CVE-2021-29984

NameCVE-2021-29984
DescriptionInstruction reordering resulted in a sequence of instructions that would cause an object to be incorrectly considered during garbage collection. This led to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 78.13, Thunderbird < 91, Firefox ESR < 78.13, and Firefox < 91.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-2740-1, DLA-2745-1, DSA-4956-1, DSA-4959-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
firefox (PTS)sid126.0-1fixed
firefox-esr (PTS)jessie, jessie (lts)68.9.0esr-1~deb8u2vulnerable
stretch (security), stretch (lts), stretch91.11.0esr-1~deb9u1fixed
buster91.12.0esr-1~deb10u1fixed
buster (security)115.11.0esr-1~deb10u1fixed
bullseye115.7.0esr-1~deb11u1fixed
bullseye (security)115.11.0esr-1~deb11u1fixed
bookworm115.7.0esr-1~deb12u1fixed
bookworm (security)115.11.0esr-1~deb12u1fixed
sid, trixie115.11.0esr-1fixed
thunderbird (PTS)jessie, jessie (lts)1:68.9.0-1~deb8u2vulnerable
stretch (security), stretch (lts), stretch1:91.10.0-1~deb9u1fixed
buster1:91.12.0-1~deb10u1fixed
buster (security)1:115.11.0-1~deb10u1fixed
bullseye1:115.7.0-1~deb11u1fixed
bullseye (security)1:115.11.0-1~deb11u1fixed
bookworm1:115.7.0-1~deb12u1fixed
bookworm (security)1:115.11.0-1~deb12u1fixed
trixie1:115.10.1-1fixed
sid1:115.11.0-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
firefoxsource(unstable)91.0-1
firefox-esrsourcejessie(unfixed)end-of-life
firefox-esrsourcestretch78.13.0esr-1~deb9u1DLA-2740-1
firefox-esrsourcebuster78.13.0esr-1~deb10u1DSA-4956-1
firefox-esrsourcebullseye78.13.0esr-1~deb11u1DSA-4956-1
firefox-esrsource(unstable)78.13.0esr-1
thunderbirdsourcejessie(unfixed)end-of-life
thunderbirdsourcestretch1:78.13.0-1~deb9u1DLA-2745-1
thunderbirdsourcebuster1:78.13.0-1~deb10u1DSA-4959-1
thunderbirdsourcebullseye1:78.13.0-1~deb11u1DSA-4959-1
thunderbirdsource(unstable)1:78.13.0-1

Notes

https://www.mozilla.org/en-US/security/advisories/mfsa2021-33/#CVE-2021-29984
https://www.mozilla.org/en-US/security/advisories/mfsa2021-34/#CVE-2021-29984
https://www.mozilla.org/en-US/security/advisories/mfsa2021-36/#CVE-2021-29984

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