CVE-2018-6406

Name	CVE-2018-6406
Description	The function ParseVP9SuperFrameIndex in common/libwebm_util.cc in libwebm through 2018-01-30 does not validate the child_frame_length data obtained from a .webm file, which allows remote attackers to cause an information leak or a denial of service (heap-based buffer over-read and later out-of-bounds write), or possibly have unspecified other impact.
Source	CVE (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 Package	Release	Version	Status
chromium-browser (PTS)	jessie, jessie (lts)	57.0.2987.98-1~deb8u1	vulnerable
	stretch (security), stretch (lts), stretch	71.0.3578.80-1~deb9u1	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
chromium-browser	source	(unstable)	(unfixed)	unimportant

Notes

Chromium is built with support for VP9 disabled in Debian
https://bugs.chromium.org/p/webm/issues/detail?id=1492
https://github.com/dwfault/PoCs/blob/master/libwebm%20ParseVP9SuperFrameIndex%20memory%20corruption/libwebm%20ParseVP9SuperFrameIndex%20OOB%20read.md