GHSA-xxh6-gw5r-86fmMediumCVSS 3.7
libmspack through 0.11alpha contains an uninitialized memory disclosure vulnerability in the MS...
🔗 CVE IDs covered (1)
📋 Description
libmspack through 0.11alpha contains an uninitialized memory disclosure vulnerability in the MS-ZIP decompressor that allows attackers to leak heap data via unchecked back-reference distances. Attackers can supply a crafted MS-ZIP CAB file whose first block begins with a back-reference, causing cabd->extract() to write up to 32 KiB of stale heap memory into extracted output.
🔗 References (7)
- https://nvd.nist.gov/vuln/detail/CVE-2026-119602
- https://github.com/kyz/libmspack/issues/60
- https://github.com/kyz/libmspack
- https://github.com/kyz/libmspack/blob/v0.11alpha/libmspack/mspack/mszipd.c#L264-L276
- https://hackmd.io/@haindpwn/libmspack-mszip-uninit-window-info-leak
- https://www.vulncheck.com/advisories/libmspack-through-0-11alpha-uninitialized-memory-disclosure-via-ms-zip-decompressor-window
- https://github.com/advisories/GHSA-xxh6-gw5r-86fm