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, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-2170-1, DLA-2172-1, DSA-4655-1, DSA-4656-1
NVD severitymedium

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
firefox (PTS)sid78.0.2-1fixed
firefox-esr (PTS)stretch68.4.1esr-1~deb9u1vulnerable
stretch (security)68.10.0esr-1~deb9u1fixed
buster68.7.0esr-1~deb10u1fixed
buster (security)68.10.0esr-1~deb10u1fixed
bullseye, sid68.10.0esr-1fixed
thunderbird (PTS)stretch1:68.4.1-1~deb9u1vulnerable
stretch (security)1:68.10.0-1~deb9u1fixed
buster1:68.7.0-1~deb10u1fixed
buster (security)1:68.10.0-1~deb10u1fixed
bullseye, sid1:68.10.0-1fixed

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

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

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