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Vulnerability DatabaseCVE-2022-22824
CVE-2022-22824:
Tenable Nessus vulnerability analysis and mitigation
Overview
defineAttribute in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow vulnerability. This vulnerability was discovered in January 2022 and affects the XML parsing functionality in Expat libraries (MITRE CVE, NVD).
Technical details
The vulnerability exists in the defineAttribute function within xmlparse.c file of the Expat library. It is one of several integer overflow vulnerabilities that were discovered and fixed in version 2.4.3. The issue has been assigned a CVSS v3.1 base score of 9.8 (Critical) (Tenable).
Impact
The integer overflow vulnerability could lead to denial of service or potentially the execution of arbitrary code if a malformed XML file is processed (Debian Security).
Mitigation and workarounds
The vulnerability has been fixed in Expat version 2.4.3. Users and organizations should upgrade to this version or later. The fix was implemented through a patch that prevents integer overflows in the defineAttribute function (Github PR). Multiple distributions have released security updates, including Debian (2.2.10-2+deb11u1 for bullseye) and Gentoo (>=2.4.9) (Debian Security, Gentoo Security).
Additional resources
Source: This report was generated using AI
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