CVE-2016-5270

Name	CVE-2016-5270
Description	Heap-based buffer overflow in the nsCaseTransformTextRunFactory::TransformString function in Mozilla Firefox before 49.0, Firefox ESR 45.x before 45.4, and Thunderbird < 45.4 allows remote attackers to cause a denial of service (boolean out-of-bounds write) or possibly have unspecified other impact via Unicode characters that are mishandled during text conversion.
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-636-1, DSA-3674-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
firefox (PTS)	sid	133.0.3-1	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
	trixie	128.5.0esr-1	fixed
	sid	128.5.1esr-1	fixed

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

Package	Type	Release	Fixed Version	Origin
firefox	source	(unstable)	49.0-1
firefox-esr	source	wheezy	45.4.0esr-1~deb7u1	DLA-636-1
firefox-esr	source	jessie	45.4.0esr-1~deb8u2	DSA-3674-1
firefox-esr	source	(unstable)	45.4.0esr-1

https://www.mozilla.org/en-US/security/advisories/mfsa2016-86/
https://www.mozilla.org/en-US/security/advisories/mfsa2016-87/