CVE-2021-29964

NameCVE-2021-29964
DescriptionA locally-installed hostile program could send `WM_COPYDATA` messages that Firefox would process incorrectly, leading to an out-of-bounds read. *This bug only affects Firefox on Windows. Other operating systems are unaffected.*. This vulnerability affects Thunderbird < 78.11, Firefox < 89, and Firefox ESR < 78.11.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

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~deb8u2fixed
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~deb8u2fixed
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
sid, trixie1:115.11.0-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
firefoxsource(unstable)(not affected)
firefox-esrsource(unstable)(not affected)
thunderbirdsource(unstable)(not affected)

Notes

- firefox-esr <not-affected> (Only affects Windows)
- firefox <not-affected> (Only affects Windows)
- thunderbird <not-affected> (Only affects Windows)
https://www.mozilla.org/en-US/security/advisories/mfsa2021-26/#CVE-2021-29964
https://www.mozilla.org/en-US/security/advisories/mfsa2021-24/#CVE-2021-29964
https://www.mozilla.org/en-US/security/advisories/mfsa2021-23/#CVE-2021-29964

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