CVE-2019-9720

NameCVE-2019-9720
DescriptionA stack-based buffer overflow in the subtitle decoder in Libav 12.3 allows attackers to corrupt the stack via a crafted video file in Matroska format, because srt_to_ass in libavcodec/srtdec.c misuses snprintf.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
libav (PTS)jessie, jessie (lts)6:11.12-1~deb8u9vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
libavsourcewheezy(unfixed)end-of-life
libavsource(unstable)(unfixed)unimportant

Notes

Actual vulnerability description is (https://lgtm.com/security/):
"Denial of service due to quadratic call to strstr in srtdec.c"
Using strstr is not an actual DoS

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