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Llamafile ZIP Parser Crash PoC

CRASH-VULN-01: Local File Header Offset Overflow → SIGBUS

A crafted .llamafile ZIP container with inflated namesize and extrasize fields in the local file header causes an unchecked offset overflow in llamafile_open_zip(), leading to an immediate SIGBUS crash.

Reproduce

llamafile --cli -m poc_lfile_offset.llamafile --prompt "test"
# Exit code 138 (SIGBUS)

Files

poc_lfile_offset.llamafile — PoC file (132 bytes), crashes llamafile v0.10.0
poc_lfile_offset.py — Generator script
poc_size_overflow.llamafile — Secondary PoC (integer sign confusion)
poc_size_overflow.py — Generator script

Affected

llamafile v0.10.0 and all prior versions.

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