CVE-2021-29985

NameCVE-2021-29985
DescriptionA use-after-free vulnerability in media channels could have 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, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-2740-1, DLA-2745-1, DSA-4956-1, DSA-4959-1
NVD severitymedium

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
firefox (PTS)sid92.0-1fixed
firefox-esr (PTS)stretch68.10.0esr-1~deb9u1vulnerable
stretch (security)78.14.0esr-1~deb9u1fixed
buster78.11.0esr-1~deb10u1vulnerable
buster (security)78.14.0esr-1~deb10u1fixed
bullseye78.12.0esr-1vulnerable
bullseye (security)78.14.0esr-1~deb11u1fixed
bookworm, sid78.14.0esr-1fixed
thunderbird (PTS)stretch1:68.10.0-1~deb9u1vulnerable
stretch (security)1:78.14.0-1~deb9u1fixed
buster1:78.6.0-1~deb10u1vulnerable
buster (security)1:78.14.0-1~deb10u1fixed
bullseye1:78.12.0-1vulnerable
bullseye (security)1:78.14.0-1~deb11u1fixed
bookworm, sid1:78.14.0-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
firefoxsource(unstable)91.0-1
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
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-2021-29985
https://www.mozilla.org/en-US/security/advisories/mfsa2021-34/#CVE-2021-29985
https://www.mozilla.org/en-US/security/advisories/mfsa2021-36/#CVE-2021-29985

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