CVE-2021-23999

NameCVE-2021-23999
DescriptionIf a Blob URL was loaded through some unusual user interaction, it could have been loaded by the System Principal and granted additional privileges that should not be granted to web content. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-2632-1, DLA-2633-1, DSA-4895-1, DSA-4897-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
firefox (PTS)sid120.0.1-1fixed
firefox-esr (PTS)buster91.12.0esr-1~deb10u1fixed
buster (security)115.5.0esr-1~deb10u1fixed
bullseye102.15.0esr-1~deb11u1fixed
bullseye (security)115.5.0esr-1~deb11u1fixed
bookworm102.15.1esr-1~deb12u1fixed
bookworm (security)115.5.0esr-1~deb12u1fixed
sid, trixie115.5.0esr-1fixed
thunderbird (PTS)buster1:91.12.0-1~deb10u1fixed
buster (security)1:115.5.0-1~deb10u1fixed
bullseye1:102.13.1-1~deb11u1fixed
bullseye (security)1:115.5.0-1~deb11u1fixed
bookworm1:102.15.1-1~deb12u1fixed
bookworm (security)1:115.5.0-1~deb12u1fixed
sid, trixie1:115.5.1-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
firefoxsource(unstable)88.0-1
firefox-esrsourcestretch78.10.0esr-1~deb9u1DLA-2633-1
firefox-esrsourcebuster78.10.0esr-1~deb10u1DSA-4895-1
firefox-esrsource(unstable)78.10.0esr-1
thunderbirdsourcestretch1:78.10.0-1~deb9u1DLA-2632-1
thunderbirdsourcebuster1:78.10.0-1~deb10u1DSA-4897-1
thunderbirdsource(unstable)1:78.10.0-1

Notes

https://www.mozilla.org/en-US/security/advisories/mfsa2021-14/#CVE-2021-23999
https://www.mozilla.org/en-US/security/advisories/mfsa2021-15/#CVE-2021-23999
https://www.mozilla.org/en-US/security/advisories/mfsa2021-16/#CVE-2021-23999

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