CVE-2021-37623

NameCVE-2021-37623
DescriptionExiv2 is a command-line utility and C++ library for reading, writing, deleting, and modifying the metadata of image files. An infinite loop was found in Exiv2 versions v0.27.4 and earlier. The infinite loop is triggered when Exiv2 is used to modify 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 deleting the IPTC data, which is a less frequently used Exiv2 operation that requires an extra command line option (`-d I rm`). The bug is fixed in version v0.27.5.
SourceCVE (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)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
exiv2 (PTS)buster0.25-4+deb10u2fixed
buster (security)0.25-4+deb10u4fixed
bullseye (security), bullseye0.27.3-3+deb11u1vulnerable
bookworm, sid0.27.6-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
exiv2sourcebuster(not affected)
exiv2source(unstable)0.27.5-1

Notes

[bullseye] - exiv2 <ignored> (Minor issue)
[buster] - exiv2 <not-affected> (relevant IPTC parsing added in 0.26)
https://github.com/Exiv2/exiv2/security/advisories/GHSA-mvc4-g5pv-4qqq
https://github.com/Exiv2/exiv2/pull/1790

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