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Debian Bullseye DSA-5271-1 Critical: Libxml2 Overflow and Corruption

debian
Calendar Grey November 5, 2022
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The latest security patch for Libxml2 tackles severe vulnerabilities in the Debian stable release, urging immediate updates to enhance protection.
Several vulnerabilities were discovered in libxml2, a library providing support to read, modify and write XML and HTML files
Topics%20covered

Topics Covered

security advisory critical integer overflow libxml2 memory error

Summary

CVE-2022-40303

Maddie Stone discovered that missing safety checks in several
functions can result in integer overflows when parsing a XML
document with the XML_PARSE_HUGE option enabled.

CVE-2022-40304

Ned Williamson and Nathan Wachholz discovered a vulnerability when
handling detection of entity reference cycles, which may result in
corrupted dictionary entries. This flaw may lead to logic errors,
including memory errors like double free flaws.

For the stable distribution (bullseye), these problems have been fixed in
version 2.9.10+dfsg-6.7+deb11u3.

We recommend that you upgrade your libxml2 packages.

For the detailed security status of libxml2 please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/source-package/libxml2

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/



Severity
critical
Lowest
Low
Medium
High
Critical

Package: libxml2
CVE ID: CVE-2022-40303 CVE-2022-40304

Topics%20covered

Topics Covered

security advisory critical integer overflow libxml2 memory error

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