CVE-2019-12874 — An issue was discovered in zlib_decompress_extra in modules/demux/mkv/util

An issue was discovered in zlib_decompress_extra in modules/demux/mkv/util.cpp in VideoLAN VLC media player 3.x through 3.0.7. The Matroska demuxer, while parsing a malformed MKV file type, has a double free.

01What is this vulnerability?

An issue was discovered in zlib_decompress_extra in modules/demux/mkv/util.cpp in VideoLAN VLC media player 3.x through 3.0.7. The Matroska demuxer, while parsing a malformed MKV file type, has a double free.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

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: 2019-06-18T17:53:09.000Z
• Last modified: 2024-08-04T23:32:55.483Z

09References

• git.videolan.org — http://git.videolan.org/?p=vlc.git%3Ba=commit%3Bh=81023659c7de5ac2637b4a879195ef…
• www.securityfocus.com — http://www.securityfocus.com/bid/108882
• usn.ubuntu.com — https://usn.ubuntu.com/4074-1/
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00005.html
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00040.html
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00037.html
• security.gentoo.org — https://security.gentoo.org/glsa/201908-23
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00081.html