CVE-2017-6419 — mspack/lzxd
mspack/lzxd.c in libmspack 0.5alpha, as used in ClamAV 0.99.2, allows remote attackers to cause a denial of service (heap-based buffer overflow and application crash) or possibly have unspecified other impact via a crafted CHM file.
Published
2017-08-07T03:29:00.277
Last modified
2026-05-13T00:24:29.033
CVSS vector
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
01What is this vulnerability?
mspack/lzxd.c in libmspack 0.5alpha, as used in ClamAV 0.99.2, allows remote attackers to cause a denial of service (heap-based buffer overflow and application crash) or possibly have unspecified other impact via a crafted CHM file.
02Affected products
No structured affected-product list available — see references below for vendor advisories.
03Active exploitation status
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
04Recommended remediation
- Patch to a fixed version listed in the vendor advisory (see references below).
- Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
- Hunt historical logs for exploitation indicators — see Detection signatures below.
05Technical details
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
06Detection signatures
Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.
07Related CVEs
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.
08Timeline
- Published: 2017-08-07T03:29:00.277
- Last modified: 2026-05-13T00:24:29.033
09References
- www.debian.org — http://www.debian.org/security/2017/dsa-3946
- bugzilla.clamav.net — https://bugzilla.clamav.net/show_bug.cgi?id=11701
- github.com — https://github.com/varsleak/varsleak-vul/blob/master/clamav-vul/heap-overflow/cl…
- github.com — https://github.com/vrtadmin/clamav-devel/commit/a83773682e856ad6529ba6db8d1792e6…
- lists.debian.org — https://lists.debian.org/debian-lts-announce/2018/02/msg00014.html
- security.gentoo.org — https://security.gentoo.org/glsa/201804-16
- www.debian.org — http://www.debian.org/security/2017/dsa-3946
- bugzilla.clamav.net — https://bugzilla.clamav.net/show_bug.cgi?id=11701
- github.com — https://github.com/varsleak/varsleak-vul/blob/master/clamav-vul/heap-overflow/cl…
- github.com — https://github.com/vrtadmin/clamav-devel/commit/a83773682e856ad6529ba6db8d1792e6…
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