mischard

chsys

0ops_ctf

Task: FreeBSD chroot escape via env_manager binary. Solution: Directory confusion attack - create directory with same name as expected file, causing execv() to fail and trigger fallback code that reads /flag.

$ ls tags/ techniques/

binary_analysis reverse_engineering freebsd chroot jail directory_confusion execv_failure fallback_exploitation elf64 cp_behavior

Directory confusion attack (file vs directory)execv() failure exploitationFallback code path triggeringFreeBSD jail escape via logic flaw

Analysis

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$ python3 exploit.py --target 192.168.1.1 --port 8080
[*] Connecting to target...
[+] Shell obtained!

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