CVE-2021-23968

NameCVE-2021-23968
DescriptionIf Content Security Policy blocked frame navigation, the full destination of a redirect served in the frame was reported in the violation report; as opposed to the original frame URI. This could be used to leak sensitive information contained in such URIs. This vulnerability affects Firefox < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-2575-1, DLA-2578-1, DSA-4862-1, DSA-4866-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
firefox (PTS)sid128.0-1fixed
firefox-esr (PTS)bullseye115.12.0esr-1~deb11u1fixed
bullseye (security)115.13.0esr-1~deb11u1fixed
bookworm115.12.0esr-1~deb12u1fixed
bookworm (security)115.13.0esr-1~deb12u1fixed
trixie115.12.0esr-1fixed
sid115.13.0esr-1fixed
thunderbird (PTS)bullseye1:115.12.0-1~deb11u1fixed
bullseye (security)1:115.13.0-1~deb11u1fixed
bookworm1:115.12.0-1~deb12u1fixed
bookworm (security)1:115.13.0-1~deb12u1fixed
sid, trixie1:115.13.0-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
firefoxsource(unstable)86.0-1
firefox-esrsourcestretch78.8.0esr-1~deb9u1DLA-2575-1
firefox-esrsourcebuster78.8.0esr-1~deb10u1DSA-4862-1
firefox-esrsource(unstable)78.8.0esr-1
thunderbirdsourcestretch1:78.8.0-1~deb9u1DLA-2578-1
thunderbirdsourcebuster1:78.8.0-1~deb10u1DSA-4866-1
thunderbirdsource(unstable)1:78.8.0-1

Notes

https://www.mozilla.org/en-US/security/advisories/mfsa2021-07/#CVE-2021-23968
https://www.mozilla.org/en-US/security/advisories/mfsa2021-08/#CVE-2021-23968
https://www.mozilla.org/en-US/security/advisories/mfsa2021-09/#CVE-2021-23968

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