CVE-2021-29988

NameCVE-2021-29988
DescriptionFirefox incorrectly treated an inline list-item element as a block element, resulting in an out of bounds read or 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)sid124.0.1-1fixed
firefox-esr (PTS)buster91.12.0esr-1~deb10u1fixed
buster (security)115.9.1esr-1~deb10u1fixed
bullseye115.7.0esr-1~deb11u1fixed
bullseye (security)115.9.1esr-1~deb11u1fixed
bookworm115.7.0esr-1~deb12u1fixed
bookworm (security)115.9.1esr-1~deb12u1fixed
trixie115.8.0esr-1fixed
sid115.9.1esr-1fixed
thunderbird (PTS)buster1:91.12.0-1~deb10u1fixed
buster (security)1:115.9.0-1~deb10u1fixed
bullseye1:115.7.0-1~deb11u1fixed
bullseye (security)1:115.9.0-1~deb11u1fixed
bookworm1:115.7.0-1~deb12u1fixed
bookworm (security)1:115.9.0-1~deb12u1fixed
trixie1:115.7.0-1fixed
sid1:115.9.0-1fixed

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-2021-29988
https://www.mozilla.org/en-US/security/advisories/mfsa2021-34/#CVE-2021-29988
https://www.mozilla.org/en-US/security/advisories/mfsa2021-36/#CVE-2021-29988

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