CVE-2021-4156

Name	CVE-2021-4156
Description	An out-of-bounds read flaw was found in libsndfile's FLAC codec functionality. An attacker who is able to submit a specially crafted file (via tricking a user to open or otherwise) to an application linked with libsndfile and using the FLAC codec, could trigger an out-of-bounds read that would most likely cause a crash but could potentially leak memory information that could be used in further exploitation of other flaws.
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-3058-1, DLA-3126-1
Debian Bugs	1014713

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libsndfile (PTS)	buster	1.0.28-6+deb10u1	vulnerable
	buster (security)	1.0.28-6+deb10u2	fixed
	bullseye	1.0.31-2	vulnerable
	bookworm	1.2.0-1	fixed
	sid, trixie	1.2.2-1	fixed

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

Package	Type	Release	Fixed Version	Origin	Debian Bugs
libsndfile	source	stretch	1.0.27-3+deb9u3	DLA-3058-1
libsndfile	source	buster	1.0.28-6+deb10u2	DLA-3126-1
libsndfile	source	(unstable)	1.1.0-1		1014713

Notes

[bullseye] - libsndfile <no-dsa> (Minor issue)
https://github.com/libsndfile/libsndfile/issues/731
https://github.com/libsndfile/libsndfile/commit/ced91d7b971be6173b604154c39279ce90ad87cc (1.1.0beta1)