CVE-2021-37621: Denial of service due to infinite loop in Image::printIFDStructure

First published: Mon Aug 09 2021(Updated: )

Exiv2 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 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 image ICC profile, which is a less frequently used Exiv2 operation that requires an extra command line option (`-p C`). The bug is fixed in version v0.27.5.

Credit: security-advisories@github.com security-advisories@github.com

Affected Software	Affected Version	How to fix
Exiv2 Exiv2	<=0.27.4
Fedoraproject Fedora	=33
Fedoraproject Fedora	=34
Debian Debian Linux	=10.0

Remedy

https://github.com/Exiv2/exiv2/pull/1778

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