CVE-2023-6856

NameCVE-2023-6856
DescriptionThe WebGL `DrawElementsInstanced` method was susceptible to a heap buffer overflow when used on systems with the Mesa VM driver. This issue could allow an attacker to perform remote code execution and sandbox escape. This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-3697-1, DLA-3698-1, DSA-5581-1, DSA-5582-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
firefox (PTS)sid126.0-1fixed
firefox-esr (PTS)buster91.12.0esr-1~deb10u1vulnerable
buster (security)115.11.0esr-1~deb10u1fixed
bullseye115.7.0esr-1~deb11u1fixed
bullseye (security)115.11.0esr-1~deb11u1fixed
bookworm115.7.0esr-1~deb12u1fixed
bookworm (security)115.11.0esr-1~deb12u1fixed
sid, trixie115.11.0esr-1fixed
thunderbird (PTS)buster1:91.12.0-1~deb10u1vulnerable
buster (security)1:115.11.0-1~deb10u1fixed
bullseye1:115.7.0-1~deb11u1fixed
bullseye (security)1:115.11.0-1~deb11u1fixed
bookworm1:115.7.0-1~deb12u1fixed
bookworm (security)1:115.11.0-1~deb12u1fixed
trixie1:115.10.1-1fixed
sid1:115.11.0-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
firefoxsource(unstable)121.0-1
firefox-esrsourcebuster115.6.0esr-1~deb10u1DLA-3697-1
firefox-esrsourcebullseye115.6.0esr-1~deb11u1DSA-5581-1
firefox-esrsourcebookworm115.6.0esr-1~deb12u1DSA-5581-1
firefox-esrsource(unstable)115.6.0esr-1
thunderbirdsourcebuster1:115.6.0-1~deb10u1DLA-3698-1
thunderbirdsourcebullseye1:115.6.0-1~deb11u1DSA-5582-1
thunderbirdsourcebookworm1:115.6.0-1~deb12u1DSA-5582-1
thunderbirdsource(unstable)1:115.6.0-1

Notes

https://www.mozilla.org/en-US/security/advisories/mfsa2023-56/#CVE-2023-6856
https://www.mozilla.org/en-US/security/advisories/mfsa2023-55/#CVE-2023-6856
https://www.mozilla.org/en-US/security/advisories/mfsa2023-54/#CVE-2023-6856

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