pwnhard

Military System

tamuctf

Task: ARM64 binary with UAF in close_channel (pointer not zeroed after free). Solution: Leak heap/PIE via stale metadata, tcache poisoning with safe-linking bypass to overwrite global auth, read flag.

$ ls tags/ techniques/

heap use_after_free seccomp arm64 qemu pie_leak tcache_poisoning aarch64 safe_linking heap_leak

arbitrary_writesafe_linking_bypassuaf_tcache_poisoningstale_pointer_leakauth_bypass

Analysis

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

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