CVE-2021-34335

Name	CVE-2021-34335
Description	Exiv2 is a command-line utility and C++ library for reading, writing, deleting, and modifying the metadata of image files. A floating point exception (FPE) due to an integer divide by zero was found in Exiv2 versions v0.27.4 and earlier. The FPE is triggered when Exiv2 is used to print the metadata of a crafted image file. An attacker could potentially exploit the vulnerability to cause a denial of service, if they can trick the victim into running Exiv2 on a crafted image file. Note that this bug is only triggered when printing the interpreted (translated) data, which is a less frequently used Exiv2 operation that requires an extra command line option (`-p t` or `-P t`). The bug is fixed in version v0.27.5.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	992707

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
exiv2 (PTS)	buster	0.25-4+deb10u2	fixed
	buster (security)	0.25-4+deb10u4	fixed
	bullseye	0.27.3-3+deb11u2	fixed
	bullseye (security)	0.27.3-3+deb11u1	vulnerable
	sid, trixie, bookworm	0.27.6-1	fixed

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

Package	Type	Release	Fixed Version	Debian Bugs
exiv2	source	buster	(not affected)
exiv2	source	bullseye	0.27.3-3+deb11u2
exiv2	source	(unstable)	0.27.5-1	992707

Notes

[buster] - exiv2 <not-affected> (resolveLens0xffff added in 0.26)
https://github.com/Exiv2/exiv2/security/advisories/GHSA-pvjp-m4f6-q984
https://github.com/Exiv2/exiv2/pull/1750