0x0 App - System

dimanche 13 mai 2018, 03:37  #1
ELF x86 - Stack buffer overflow basic 1
coconuthead
  • 7 posts

Is anyone having issues with the shell in this challenge ? I crafted the overflow, but system("/bin/dash") returns immediately with EAX=0. Or is this part of the challenge and I am missing something ? I’ve tried adding extra data to the input to be read by the shell, but that does not work. The shell should wait for input anyway. Also tried appending a newline due to line buffering, but this also did not help.

dimanche 13 mai 2018, 04:05  #2
ELF x86 - Stack buffer overflow basic 1
coconuthead
  • 7 posts

Nevermind. Hint : use strace to see what is really happening.

jeudi 14 juin 2018, 13:11  #3
ELF x86 - Stack buffer overflow basic 1
wulfgarpro
  • 1 posts

Even though your strace approach is valid, I found this an interesting question and answer if you’d like to use another approach or you’re confused as to why your strace solution actully works.