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Kaushik Narayan R 2024-09-03 19:41:46 -07:00
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Dojo Notes.md
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@ -11,8 +11,8 @@
### .06 - find and exec ### .06 - find and exec
- "Optional Exercise: Why do they think it worked with `-exec` parameter of the `find` command, but we get permission denied using standalone `cat` command? Hint: SUID bit was set for the `find` command." - "Optional Exercise: Why do they think it worked with `-exec` parameter of the `find` command, but we get permission denied using standalone `cat` command? Hint: SUID bit was set for the `find` command."
- indeed, we see that `/usr/bin/find` has its *setuid* bit set: - indeed, we see that `/usr/bin/find` has its _setuid_ bit set:
![-rwsr-xr-x 1 root root 320160 Feb 18 2020 /usr/bin/find*](ss1.png) ![-rwsr-xr-x 1 root root 320160 Feb 18 2020 /usr/bin/find*](ss1.png)
- [see here](https://unix.stackexchange.com/a/389706/595039) for find stuff - [see here](https://unix.stackexchange.com/a/389706/595039) for find stuff
- `find / -name random_cant_flag -exec cat {} ';'` worked - `find / -name random_cant_flag -exec cat {} ';'` worked
@ -82,7 +82,7 @@
### .05 - extra verification ### .05 - extra verification
- angr just straight up hangs lol - angr just straight up hangs lol
- holy sh*t so many if statements - holy sh\*t so many if statements
- boils down to byte by byte, check 1 or 0, check +ve or -ve (MSB) - boils down to byte by byte, check 1 or 0, check +ve or -ve (MSB)
- 00 - 00110111 - 00 - 00110111
- 01 - 01000111 - 01 - 01000111
@ -113,3 +113,30 @@
- so for each if statement, check which of 0/1 makes it false (find and replace ftw) - so for each if statement, check which of 0/1 makes it false (find and replace ftw)
- ascii string is 67kW6YnKvTpaqoBX1F8l - ascii string is 67kW6YnKvTpaqoBX1F8l
- really should have automated this - really should have automated this
### .07 - binary labyrinth
- omg it's literally labyrinth navigation, using wasd keys LMFAO
```c
int M[12][12]={
{ 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1},
{ 1, 0, 1, 0, 0, 1, 0, 1, 0, 0, 0, 0},
{ 1, 0, 0, 0, 1, 1, 0, 1, 0, 1, 0, 1},
{ 1, 0, 1, 0, 1, 1, 0, 1, 0, 0, 0, 1},
{ 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 1},
{ 1, 1, 0, 1, 1, 0, 0, 0, 0, 0, 1, 1},
{ 1, 1, 0, 1, 1, 0, 1, 1, 1, 0, 0, 1},
{ 1, 1, 0, 0, 0, 1, 1, 0, 0, 0, 1, 1},
{ 1, 1, 0, 1, 0, 1, 0, 0, 1, 1, 1, 1},
{ 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 1, 1},
{ 1, 1, 0, 1, 0, 0, 0, 0, 1, 1, 1, 1},
{ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1}
};
```
- 1s are landmines
- start from row 1, column 2 (x=1, y=0)
- goal is row 2, column 12 (x=0xb, y=1)
- ssssdsssddsssdddwwwddwwwwdwwd
- lol