CVE-2020-15673

Name	CVE-2020-15673
Description	Mozilla developers reported memory safety bugs present in Firefox 80 and Firefox ESR 78.2. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. 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	133.0-1	fixed
firefox-esr (PTS)	bullseye	115.14.0esr-1~deb11u1	fixed
	bullseye (security)	128.5.0esr-1~deb11u1	fixed
	bookworm	128.3.1esr-1~deb12u1	fixed
	bookworm (security)	128.5.0esr-1~deb12u1	fixed
	sid, trixie	128.5.0esr-1	fixed
thunderbird (PTS)	bullseye	1:115.12.0-1~deb11u1	fixed
	bullseye (security)	1:128.5.0esr-1~deb11u1	fixed
	bookworm	1:115.16.0esr-1~deb12u1	fixed
	bookworm (security)	1:128.5.0esr-1~deb12u1	fixed
	sid, trixie	1:128.5.0esr-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-2020-15673
https://www.mozilla.org/en-US/security/advisories/mfsa2020-43/#CVE-2020-15673
https://www.mozilla.org/en-US/security/advisories/mfsa2020-44/#CVE-2020-15673