CVE-2021-38500

NameCVE-2021-38500
DescriptionMozilla developers reported memory safety bugs present in Firefox 92 and Firefox ESR 91.1. 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. This vulnerability affects Thunderbird < 78.15, Thunderbird < 91.2, Firefox ESR < 91.2, Firefox ESR < 78.15, and Firefox < 93.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
ReferencesDLA-2782-1, DLA-2874-1, DSA-4981-1, DSA-5034-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
firefox (PTS)sid105.0-1fixed
firefox-esr (PTS)buster91.12.0esr-1~deb10u1fixed
buster (security)102.3.0esr-1~deb10u1fixed
bullseye91.13.0esr-1~deb11u1fixed
bullseye (security)102.3.0esr-1~deb11u1fixed
bookworm102.2.0esr-1fixed
sid102.3.0esr-1fixed
thunderbird (PTS)buster1:91.12.0-1~deb10u1fixed
buster (security)1:91.13.0-1~deb10u1fixed
bullseye (security), bullseye1:91.13.0-1~deb11u1fixed
bookworm1:102.2.2-1fixed
sid1:102.3.0-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
firefoxsource(unstable)93.0-1
firefox-esrsourcestretch78.15.0esr-1~deb9u1DLA-2782-1
firefox-esrsourcebuster78.15.0esr-1~deb10u1DSA-4981-1
firefox-esrsourcebullseye78.15.0esr-1~deb11u1DSA-4981-1
firefox-esrsource(unstable)91.2.0esr-1
thunderbirdsourceexperimental1:91.2.0-1
thunderbirdsourcestretch1:91.4.1-1~deb9u1DLA-2874-1
thunderbirdsourcebuster1:91.4.1-1~deb10u1DSA-5034-1
thunderbirdsourcebullseye1:91.4.1-1~deb11u1DSA-5034-1
thunderbirdsource(unstable)1:91.2.1-1

Notes

https://www.mozilla.org/en-US/security/advisories/mfsa2021-43/#CVE-2021-38500
https://www.mozilla.org/en-US/security/advisories/mfsa2021-44/#CVE-2021-38500
https://www.mozilla.org/en-US/security/advisories/mfsa2021-45/#CVE-2021-38500
https://www.mozilla.org/en-US/security/advisories/mfsa2021-46/#CVE-2021-38500
https://www.mozilla.org/en-US/security/advisories/mfsa2021-47/#CVE-2021-38500

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