CVE-2020-6800

NameCVE-2020-6800
DescriptionMozilla developers and community members reported memory safety bugs present in Firefox 72 and Firefox ESR 68.4. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. In general, these flaws cannot be exploited through email in the Thunderbird product because scripting is disabled when reading mail, but are potentially risks in browser or browser-like contexts. This vulnerability affects Thunderbird < 68.5, Firefox < 73, and Firefox < ESR68.5.
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-2102-1, DLA-2104-1, DSA-4620-1, DSA-4625-1
NVD severitymedium

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
firefox (PTS)sid82.0-1fixed
firefox-esr (PTS)stretch68.10.0esr-1~deb9u1fixed
stretch (security)78.4.0esr-1~deb9u1fixed
buster68.12.0esr-1~deb10u1fixed
buster (security)78.4.0esr-1~deb10u2fixed
bullseye78.3.0esr-2fixed
sid78.4.0esr-2fixed
thunderbird (PTS)stretch1:68.10.0-1~deb9u1fixed
stretch (security)1:78.3.1-2~deb9u1fixed
buster1:68.12.0-1~deb10u1fixed
buster (security)1:78.3.1-2~deb10u2fixed
bullseye1:68.12.0-1fixed
sid1:78.4.0-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
firefoxsource(unstable)73.0-1
firefox-esrsourcejessie68.5.0esr-1~deb8u1DLA-2102-1
firefox-esrsourcestretch68.5.0esr-1~deb9u1DSA-4620-1
firefox-esrsourcebuster68.5.0esr-1~deb10u1DSA-4620-1
firefox-esrsource(unstable)68.5.0esr-1
thunderbirdsourcejessie1:68.5.0-1~deb8u1DLA-2104-1
thunderbirdsourcestretch1:68.5.0-1~deb9u1DSA-4625-1
thunderbirdsourcebuster1:68.5.0-1~deb10u1DSA-4625-1
thunderbirdsource(unstable)1:68.5.0-1

Notes

https://www.mozilla.org/en-US/security/advisories/mfsa2020-05/#CVE-2020-6800
https://www.mozilla.org/en-US/security/advisories/mfsa2020-06/#CVE-2020-6800
https://www.mozilla.org/en-US/security/advisories/mfsa2020-07/#CVE-2020-6800

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