pwnPromedium

stackgift

spbctf

Task: Stack canary bypass via leak. Binary dumps 128 bytes of stack memory including the canary. Solution: Extract canary from stack dump at offset 0x28, build payload with correct canary to bypass __stack_chk_fail, then ret2win.

$ ls tags/ techniques/
buffer_overflowcanary_bypassstack_canarystack_dump
canary_leak
🔒

Permission denied (requires tier.pro)

Sign in to access full writeups

Sign in with GitHub to continue. No email required.

$sign in

$ grep --similar

Similar writeups