CVE-2021-38493

NameCVE-2021-38493
DescriptionMozilla developers reported memory safety bugs present in Firefox 91 and Firefox ESR 78.13. 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 Firefox ESR < 78.14, Thunderbird < 78.14, and Firefox < 92.
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-2756-1, DLA-2757-1, DSA-4969-1, DSA-4973-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
firefox (PTS)sid107.0-1fixed
firefox-esr (PTS)buster91.12.0esr-1~deb10u1fixed
buster (security)102.5.0esr-1~deb10u1fixed
bullseye91.13.0esr-1~deb11u1fixed
bullseye (security)102.5.0esr-1~deb11u1fixed
bookworm, sid102.5.0esr-1fixed
thunderbird (PTS)buster1:91.12.0-1~deb10u1fixed
buster (security)1:102.5.0-1~deb10u1fixed
bullseye1:91.13.0-1~deb11u1fixed
bullseye (security)1:102.5.0-1~deb11u1fixed
bookworm, sid1:102.5.0-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
firefoxsource(unstable)92.0-1
firefox-esrsourcestretch78.14.0esr-1~deb9u1DLA-2756-1
firefox-esrsourcebuster78.14.0esr-1~deb10u1DSA-4969-1
firefox-esrsourcebullseye78.14.0esr-1~deb11u1DSA-4969-1
firefox-esrsource(unstable)78.14.0esr-1
thunderbirdsourcestretch1:78.14.0-1~deb9u1DLA-2757-1
thunderbirdsourcebuster1:78.14.0-1~deb10u1DSA-4973-1
thunderbirdsourcebullseye1:78.14.0-1~deb11u1DSA-4973-1
thunderbirdsource(unstable)1:78.14.0-1

Notes

https://www.mozilla.org/en-US/security/advisories/mfsa2021-42/#CVE-2021-38493
https://www.mozilla.org/en-US/security/advisories/mfsa2021-39/#CVE-2021-38493
https://www.mozilla.org/en-US/security/advisories/mfsa2021-38/#CVE-2021-38493

Search for package or bug name: Reporting problems