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Vulnerability DatabaseCVE-2022-23990
CVE-2022-23990:
IBM Db2 vulnerability analysis and mitigation
Overview
Expat (aka libexpat) before 2.4.4 contains an integer overflow vulnerability in the doProlog function. The vulnerability was discovered on January 26, 2022 and affects the XML parsing library used in many software applications (CVE Details, GitHub PR).
Technical details
The vulnerability stems from an integer overflow condition in the doProlog function of Expat's XML parsing code. The issue was introduced about 20 years ago in commit cb8a4c7. The fix involved changing the variable type from 'int nameLen' to 'size_t nameLen' to prevent overflow on the 'nameLen++' operation in the code 'for (; name[nameLen++];)' (GitHub PR).
Impact
The vulnerability could result in denial of service or potentially the execution of arbitrary code if a malformed XML file is processed (Debian Advisory).
Mitigation and workarounds
The vulnerability was fixed in Expat version 2.4.4. Users and organizations should upgrade to this version or later. Multiple vendors have released patches for their products incorporating the fixed version, including Debian (versions 2.2.10-2+deb11u1 for bullseye), Ubuntu, and Fedora (Debian Advisory, Fedora Update).
Additional resources
Source: This report was generated using AI
Related IBM Db2 vulnerabilities:
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