CVE-2020-26971

NameCVE-2020-26971
DescriptionCertain blit values provided by the user were not properly constrained leading to a heap buffer overflow on some video drivers. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-2496-1, DLA-2497-1, DSA-4813-1, DSA-4815-1
NVD severitymedium

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
firefox (PTS)sid86.0-1fixed
firefox-esr (PTS)stretch68.10.0esr-1~deb9u1vulnerable
stretch (security)78.8.0esr-1~deb9u1fixed
buster78.7.0esr-1~deb10u1fixed
buster (security)78.8.0esr-1~deb10u1fixed
bullseye, sid78.8.0esr-1fixed
thunderbird (PTS)stretch1:68.10.0-1~deb9u1vulnerable
stretch (security)1:78.8.0-1~deb9u1fixed
buster1:78.6.0-1~deb10u1fixed
buster (security)1:78.8.0-1~deb10u1fixed
bullseye, sid1:78.8.0-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
firefoxsource(unstable)84.0-1
firefox-esrsourcestretch78.6.0esr-1~deb9u1DLA-2496-1
firefox-esrsourcebuster78.6.0esr-1~deb10u1DSA-4813-1
firefox-esrsource(unstable)78.6.0esr-1
thunderbirdsourcestretch1:78.6.0-1~deb9u1DLA-2497-1
thunderbirdsourcebuster1:78.6.0-1~deb10u1DSA-4815-1
thunderbirdsource(unstable)1:78.6.0-1

Notes

https://www.mozilla.org/en-US/security/advisories/mfsa2020-54/#CVE-2020-26971
https://www.mozilla.org/en-US/security/advisories/mfsa2020-55/#CVE-2020-26971
https://www.mozilla.org/en-US/security/advisories/mfsa2020-56/#CVE-2020-26971

Search for package or bug name: Reporting problems