CVE-2020-15669

Name	CVE-2020-15669
Description	When aborting an operation, such as a fetch, an abort signal may be deleted while alerting the objects to be notified. This results in a use-after-free and we presume that with enough effort it could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 68.12 and Thunderbird < 68.12.
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-2346-1, DLA-2360-1, DSA-4749-1, DSA-4754-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
firefox-esr (PTS)	buster	91.12.0esr-1~deb10u1	fixed
	buster (security)	115.10.0esr-1~deb10u1	fixed
	bullseye	115.7.0esr-1~deb11u1	fixed
	bullseye (security)	115.10.0esr-1~deb11u1	fixed
	bookworm	115.7.0esr-1~deb12u1	fixed
	bookworm (security)	115.10.0esr-1~deb12u1	fixed
	trixie	115.8.0esr-1	fixed
	sid	115.10.0esr-1	fixed
thunderbird (PTS)	buster	1:91.12.0-1~deb10u1	fixed
	buster (security)	1:115.10.1-1~deb10u1	fixed
	bullseye	1:115.7.0-1~deb11u1	fixed
	bullseye (security)	1:115.10.1-1~deb11u1	fixed
	bookworm	1:115.7.0-1~deb12u1	fixed
	bookworm (security)	1:115.10.1-1~deb12u1	fixed
	sid	1:115.10.1-1	fixed

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

Package	Type	Release	Fixed Version	Origin
firefox-esr	source	stretch	68.12.0esr-1~deb9u1	DLA-2346-1
firefox-esr	source	buster	68.12.0esr-1~deb10u1	DSA-4749-1
firefox-esr	source	(unstable)	68.12.0esr-1
thunderbird	source	stretch	1:68.12.0-1~deb9u1	DLA-2360-1
thunderbird	source	buster	1:68.12.0-1~deb10u1	DSA-4754-1
thunderbird	source	(unstable)	1:68.12.0-1

Notes

https://www.mozilla.org/en-US/security/advisories/mfsa2020-37/#CVE-2020-15669
https://www.mozilla.org/en-US/security/advisories/mfsa2020-40/#CVE-2020-15669