UBUNTU-CVE-2021-29457

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UBUNTU-CVE-2021-29457

Summary:

Details: 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.

References: https://ubuntu.com/security/CVE-2021-29457, https://github.com/Exiv2/exiv2/security/advisories/GHSA-v74w-h496-cgqm, https://github.com/Exiv2/exiv2/issues/1529, https://github.com/Exiv2/exiv2/pull/1534, https://ubuntu.com/security/notices/USN-4941-1, https://www.cve.org/CVERecord?id=CVE-2021-29457