CVE-2021-3941

Name	CVE-2021-3941
Description	In ImfChromaticities.cpp routine RGBtoXYZ(), there are some division operations such as `float Z = (1 - chroma.white.x - chroma.white.y) * Y / chroma.white.y;` and `chroma.green.y * (X + Z))) / d;` but the divisor is not checked for a 0 value. A specially crafted file could trigger a divide-by-zero condition which could affect the availability of programs linked with OpenEXR.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
Debian Bugs	1014828

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
openexr (PTS)	buster, buster (security)	2.2.1-4.1+deb10u1	vulnerable
	bullseye	2.5.4-2	vulnerable
	bookworm, sid	3.1.5-4	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
openexr	source	experimental	3.1.3-1
openexr	source	(unstable)	3.1.5-2			1014828

Notes

[bullseye] - openexr <no-dsa> (Minor issue)
[stretch] - openexr <no-dsa> (Minor issue)
https://bugzilla.redhat.com/show_bug.cgi?id=2019789
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=39084
https://github.com/AcademySoftwareFoundation/openexr/pull/1153
Fixed by: https://github.com/AcademySoftwareFoundation/openexr/commit/a0cfa81153b2464b864c5fe39a53cb03339092ed