CVE-2021-37615

Name	CVE-2021-37615
Description	Exiv2 is a command-line utility and C++ library for reading, writing, deleting, and modifying the metadata of image files. A null pointer dereference was found in Exiv2 versions v0.27.4 and earlier. The null pointer dereference 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)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
exiv2 (PTS)	bullseye	0.27.3-3+deb11u2	fixed
	bullseye (security)	0.27.3-3+deb11u1	vulnerable
	bookworm	0.27.6-1	fixed
	sid, trixie	0.28.3+dfsg-2	fixed

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

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

Notes

[buster] - exiv2 <not-affected> (resolveLens0x319 added in 0.26)
https://github.com/Exiv2/exiv2/security/advisories/GHSA-h9x9-4f77-336w
https://github.com/Exiv2/exiv2/pull/1758