CVE-2021-29473

NameCVE-2021-29473
DescriptionExiv2 is a C++ library and a command-line utility to read, write, delete and modify Exif, IPTC, XMP and ICC image metadata. An out-of-bounds read was found in Exiv2 versions v0.27.3 and earlier. Exiv2 is a command-line utility and C++ library for reading, writing, deleting, and modifying the metadata of image files. The out-of-bounds read is triggered when Exiv2 is used to write metadata into a crafted image file. An attacker could potentially exploit the vulnerability to cause a denial of service by crashing Exiv2, 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. Please see our security policy for information about Exiv2 security.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitylow
Debian Bugs987736

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
exiv2 (PTS)stretch0.25-3.1+deb9u2fixed
stretch (security)0.25-3.1+deb9u1fixed
buster0.25-4+deb10u1fixed
bullseye, sid0.27.3-3vulnerable

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
exiv2sourcestretch(not affected)
exiv2sourcebuster(not affected)
exiv2source(unstable)(unfixed)987736

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-7569-phvm-vwc2
https://github.com/Exiv2/exiv2/pull/1587
https://github.com/Exiv2/exiv2/commit/e6a0982f7cd9282052b6e3485a458d60629ffa0b
https://github.com/Exiv2/exiv2/commit/f0ff11f044b2c8ddf4792415beb91fd815c633a1

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