CVE-2020-6821

NameCVE-2020-6821
DescriptionWhen reading from areas partially or fully outside the source resource with WebGL's <code>copyTexSubImage</code> method, the specification requires the returned values be zero. Previously, this memory was uninitialized, leading to potentially sensitive data disclosure. This vulnerability affects Thunderbird < 68.7.0, Firefox ESR < 68.7, and Firefox < 75.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-2170-1, DLA-2172-1, DSA-4655-1, DSA-4656-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
firefox (PTS)sid133.0-1fixed
firefox-esr (PTS)bullseye115.14.0esr-1~deb11u1fixed
bullseye (security)128.5.0esr-1~deb11u1fixed
bookworm128.3.1esr-1~deb12u1fixed
bookworm (security)128.5.0esr-1~deb12u1fixed
trixie, sid128.5.0esr-1fixed
thunderbird (PTS)bullseye1:115.12.0-1~deb11u1fixed
bullseye (security)1:128.5.0esr-1~deb11u1fixed
bookworm1:115.16.0esr-1~deb12u1fixed
bookworm (security)1:128.5.0esr-1~deb12u1fixed
trixie, sid1:128.5.0esr-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
firefoxsource(unstable)75.0-1
firefox-esrsourcejessie68.7.0esr-1~deb8u1DLA-2170-1
firefox-esrsourcestretch68.7.0esr-1~deb9u1DSA-4655-1
firefox-esrsourcebuster68.7.0esr-1~deb10u1DSA-4655-1
firefox-esrsource(unstable)68.7.0esr-1
thunderbirdsourcejessie1:68.7.0-1~deb8u1DLA-2172-1
thunderbirdsourcestretch1:68.7.0-1~deb9u1DSA-4656-1
thunderbirdsourcebuster1:68.7.0-1~deb10u1DSA-4656-1
thunderbirdsource(unstable)1:68.7.0-1

Notes

https://www.mozilla.org/en-US/security/advisories/mfsa2020-14/#CVE-2020-6821
https://www.mozilla.org/en-US/security/advisories/mfsa2020-13/#CVE-2020-6821
https://www.mozilla.org/en-US/security/advisories/mfsa2020-12/#CVE-2020-6821

Search for package or bug name: Reporting problems