CVE-2021-29464: Heap buffer overflow in Exiv2::Jp2Image::encodeJp2Header

First published: Fri Apr 30 2021(Updated: )

Exiv2 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.

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
redhat/exiv2	<0.27.4	0.27.4

Remedy

https://github.com/Exiv2/exiv2/commit/f9308839198aca5e68a65194f151a1de92398f54

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