CVE-2023-6206

NameCVE-2023-6206
DescriptionThe black fade animation when exiting fullscreen is roughly the length of the anti-clickjacking delay on permission prompts. It was possible to use this fact to surprise users by luring them to click where the permission grant button would be about to appear. This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-3661-1, DLA-3674-1, DSA-5561-1, DSA-5566-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
firefox (PTS)sid125.0.1-2fixed
firefox-esr (PTS)buster91.12.0esr-1~deb10u1vulnerable
buster (security)115.10.0esr-1~deb10u1fixed
bullseye115.7.0esr-1~deb11u1fixed
bullseye (security)115.10.0esr-1~deb11u1fixed
bookworm115.7.0esr-1~deb12u1fixed
bookworm (security)115.10.0esr-1~deb12u1fixed
trixie115.8.0esr-1fixed
sid115.10.0esr-1fixed
thunderbird (PTS)buster1:91.12.0-1~deb10u1vulnerable
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
sid1:115.9.0-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
firefoxsource(unstable)120.0-1
firefox-esrsourcebuster115.5.0esr-1~deb10u1DLA-3661-1
firefox-esrsourcebullseye115.5.0esr-1~deb11u1DSA-5561-1
firefox-esrsourcebookworm115.5.0esr-1~deb12u1DSA-5561-1
firefox-esrsource(unstable)115.5.0esr-1
thunderbirdsourcebuster1:115.5.0-1~deb10u1DLA-3674-1
thunderbirdsourcebullseye1:115.5.0-1~deb11u1DSA-5566-1
thunderbirdsourcebookworm1:115.5.0-1~deb12u1DSA-5566-1
thunderbirdsource(unstable)1:115.5.0-1

Notes

https://www.mozilla.org/en-US/security/advisories/mfsa2023-49/#CVE-2023-6206
https://www.mozilla.org/en-US/security/advisories/mfsa2023-50/#CVE-2023-6206
https://www.mozilla.org/en-US/security/advisories/mfsa2023-52/#CVE-2023-6206

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