Vulnerability in Adri van Os antiword

[ Why it matters ]Priority signals

• Public proof-of-concept exploit exists (CISA SSVC)

[ Description ]Official description

Antiword through 0.37 contains a heap out-of-bounds read vulnerability in vGet8LstInfo in prop8.c caused by an inverted bounds check on the PlcfLst record count. Attackers can supply a crafted Word 8 .doc file claiming up to 0xffff LSTF records in a tiny buffer, causing reads past the heap allocation that crash the process.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• github.com/rsdoiel/antiword/blob/fe4b579067122a2d9d62647efb1ee7cfe3ca92bb/prop8.cProduct
• hackmd.io/@haindpwn/antiword-word8-plcflst-count-and-fkp-run-oob-readExploitMitigationThird Party Advisory
• www.vulncheck.com/advisories/antiword-through-0.37-heap-out-of-bounds-read-via-vget8lst…Third Party Advisory