CVE-2020-15676

Name	CVE-2020-15676
Description	Firefox sometimes ran the onload handler for SVG elements that the DOM sanitizer decided to remove, resulting in JavaScript being executed after pasting attacker-controlled data into a contenteditable element. This vulnerability affects Firefox < 81, Thunderbird < 78.3, and Firefox ESR < 78.3.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-2387-1, DLA-2408-1, DSA-4768-1, DSA-4770-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
firefox (PTS)	sid	132.0.2-1	fixed
firefox-esr (PTS)	bullseye	115.14.0esr-1~deb11u1	fixed
	bullseye (security)	128.4.0esr-1~deb11u1	fixed
	bookworm	128.3.1esr-1~deb12u1	fixed
	bookworm (security)	128.4.0esr-1~deb12u1	fixed
	trixie	128.3.1esr-2	fixed
	sid	128.4.0esr-1	fixed
thunderbird (PTS)	bullseye	1:115.12.0-1~deb11u1	fixed
	bullseye (security)	1:128.4.0esr-1~deb11u1	fixed
	bookworm	1:115.16.0esr-1~deb12u1	fixed
	bookworm (security)	1:128.4.0esr-1~deb12u1	fixed
	trixie	1:128.4.2esr-1	fixed
	sid	1:128.4.3esr-1	fixed

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

Package	Type	Release	Fixed Version	Origin
firefox	source	(unstable)	81.0-1
firefox-esr	source	stretch	78.3.0esr-1~deb9u1	DLA-2387-1
firefox-esr	source	buster	78.3.0esr-1~deb10u1	DSA-4768-1
firefox-esr	source	(unstable)	78.3.0esr-1
thunderbird	source	stretch	1:78.3.1-2~deb9u1	DLA-2408-1
thunderbird	source	buster	1:78.3.1-2~deb10u2	DSA-4770-1
thunderbird	source	(unstable)	1:78.3.1-1

Notes

https://www.mozilla.org/en-US/security/advisories/mfsa2020-42/#CVE-2020-15676
https://www.mozilla.org/en-US/security/advisories/mfsa2020-43/#CVE-2020-15676
https://www.mozilla.org/en-US/security/advisories/mfsa2020-44/#CVE-2020-15676