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Debian LTS Advisory DLA-3172-1 debian-lts@lists.debian.org
https://www.debian.org/lts/security/ Markus Koschany
October 30, 2022 https://wiki.debian.org/LTS
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Package : libxml2
Version : 2.9.4+dfsg1-7+deb10u5
CVE ID : CVE-2022-40303 CVE-2022-40304
Debian Bug : 1022224 1022225
It was discovered that libxml2, the GNOME XML library, was vulnerable to
integer overflows and memory corruption.
CVE-2022-40303
Parsing a XML document with the XML_PARSE_HUGE option enabled can result
in an integer overflow because safety checks were missing in some
functions. Also, the xmlParseEntityValue function did not have any length
limitation.
CVE-2022-40304
When a reference cycle is detected in the XML entity cleanup function the
XML entity data can be stored in a dictionary. In this case, the
dictionary becomes corrupted resulting in logic errors, including memory
errors like double free.
For Debian 10 buster, these problems have been fixed in version
2.9.4+dfsg1-7+deb10u5.
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/libxml2
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
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