CVE-2021-38498

NameCVE-2021-38498
DescriptionDuring process shutdown, a document could have caused a use-after-free of a languages service object, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 93, Thunderbird < 91.2, and Firefox ESR < 91.2.
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)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
firefox (PTS)sid100.0.2-1fixed
firefox-esr (PTS)stretch68.10.0esr-1~deb9u1fixed
stretch (security)91.9.1esr-1~deb9u1fixed
buster78.14.0esr-1~deb10u1fixed
buster (security)91.9.1esr-1~deb10u1fixed
bullseye78.15.0esr-1~deb11u1fixed
bullseye (security)91.9.1esr-1~deb11u1fixed
bookworm91.9.0esr-1fixed
sid91.9.1esr-1fixed
thunderbird (PTS)stretch1:68.10.0-1~deb9u1fixed
stretch (security)1:91.9.0-1~deb9u1fixed
buster1:78.14.0-1~deb10u1fixed
buster (security)1:91.9.0-1~deb10u1fixed
bullseye1:78.14.0-1~deb11u1fixed
bullseye (security)1:91.9.0-1~deb11u1fixed
bookworm, sid1:91.9.0-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
firefoxsource(unstable)93.0-1
firefox-esrsource(unstable)(not affected)
thunderbirdsource(unstable)(not affected)

Notes

- firefox-esr <not-affected> (Only affect Firefox 91 not in any supported suite in vulnerable version)
- thunderbird <not-affected> (Only affects Thunderbird 91 not in any supported suite in vulnerable version)
https://www.mozilla.org/en-US/security/advisories/mfsa2021-43/#CVE-2021-38498
https://www.mozilla.org/en-US/security/advisories/mfsa2021-45/#CVE-2021-38498
https://www.mozilla.org/en-US/security/advisories/mfsa2021-47/#CVE-2021-38498

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