CVE-2021-29464

NameCVE-2021-29464
DescriptionExiv2 is a command-line utility and C++ library for reading, writing, deleting, and modifying the metadata of image files. A heap buffer overflow was found in Exiv2 versions v0.27.3 and earlier. The heap overflow is triggered when Exiv2 is used to write metadata into a crafted image file. An attacker could potentially exploit the vulnerability to gain code execution, if they can trick the victim into running Exiv2 on a crafted image file. Note that this bug is only triggered when writing the metadata, which is a less frequently used Exiv2 operation than reading the metadata. For example, to trigger the bug in the Exiv2 command-line application, you need to add an extra command-line argument such as `insert`. The bug is fixed in version v0.27.4.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs988242

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
bullseye0.27.3-3+deb11u2fixed
bullseye (security)0.27.3-3+deb11u1vulnerable (unimportant)
sid, trixie, bookworm0.27.6-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
exiv2sourcestretch(not affected)
exiv2sourcebuster(not affected)
exiv2sourcebullseye0.27.3-3+deb11u2
exiv2source(unstable)0.27.5-1988242

Notes

[buster] - exiv2 <not-affected> (Vulnerable code introduced later)
[stretch] - exiv2 <not-affected> (Vulnerable code introduced later)
https://github.com/Exiv2/exiv2/security/advisories/GHSA-jgm9-5fw5-pw9p
https://github.com/Exiv2/exiv2/commit/f9308839198aca5e68a65194f151a1de92398f54

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