medium
4.3
CWE
908
Advisory Published
Updated

CVE-2021-29623: Uninitialized variable bug in Exiv2

First published: Thu May 13 2021(Updated: )

A read of uninitialized memory was found in Exiv2 versions v0.27.3 and earlier. The read of uninitialized memory is triggered when Exiv2 is used to read the metadata of a crafted image file. An attacker could potentially exploit the vulnerability to leak a few bytes of stack memory, if they can trick the victim into running Exiv2 on a crafted image file. Reference: <a href="https://github.com/Exiv2/exiv2/security/advisories/GHSA-6253-qjwm-3q4v">https://github.com/Exiv2/exiv2/security/advisories/GHSA-6253-qjwm-3q4v</a> Upstream Patch: <a href="https://github.com/Exiv2/exiv2/pull/1627">https://github.com/Exiv2/exiv2/pull/1627</a>

Credit: security-advisories@github.com

Affected SoftwareAffected VersionHow to fix
redhat/exiv2<0.27.4
0.27.4
CentOS Dos2unix<0.27.4
Fedora=33
Fedora=34

Remedy

https://github.com/Exiv2/exiv2/pull/1627

Remedy

https://github.com/Exiv2/exiv2/security/advisories/GHSA-6253-qjwm-3q4v

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2021-29623?

    CVE-2021-29623 is categorized as a medium severity vulnerability due to its potential to leak sensitive information from uninitialized memory.

  • How do I fix CVE-2021-29623?

    To fix CVE-2021-29623, upgrade Exiv2 to version 0.27.4 or later.

  • Which versions of Exiv2 are affected by CVE-2021-29623?

    Exiv2 versions v0.27.3 and earlier are affected by CVE-2021-29623.

  • Can CVE-2021-29623 be exploited by an attacker?

    Yes, CVE-2021-29623 can potentially be exploited by an attacker to leak a few bytes of stack memory.

  • What type of vulnerability is CVE-2021-29623?

    CVE-2021-29623 is classified as a memory-related vulnerability due to the read of uninitialized memory.

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