CVE-2021-29987

Name	CVE-2021-29987
Description	After requesting multiple permissions, and closing the first permission panel, subsequent permission panels will be displayed in a different position but still record a click in the default location, making it possible to trick a user into accepting a permission they did not want to. This bug only affects Firefox on Linux. Other operating systems are unaffected.. This vulnerability affects Firefox < 91 and Thunderbird < 91.
Source	CVE (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 Package	Release	Version	Status
firefox (PTS)	sid	137.0.2-1	fixed
thunderbird (PTS)	bullseye	1:115.12.0-1~deb11u1	fixed
	bullseye (security)	1:128.9.0esr-1~deb11u1	fixed
	bookworm	1:128.8.0esr-1~deb12u1	fixed
	bookworm (security)	1:128.9.0esr-1~deb12u1	fixed
	trixie, sid	1:128.9.0esr-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
firefox	source	(unstable)	91.0-1
thunderbird	source	(unstable)	(not affected)

Notes

- thunderbird <not-affected> (Thunderbird 78.x not affected, only TB91)
https://www.mozilla.org/en-US/security/advisories/mfsa2021-33/#CVE-2021-29987
https://www.mozilla.org/en-US/security/advisories/mfsa2021-36/#CVE-2021-29987