Debian Security Advisory
DLA-3172-1 libxml2 -- LTS security update
- Date Reported:
- 30 Oct 2022
- Affected Packages:
- Security database references:
- In the Debian bugtracking system: Bug 1022224, Bug 1022225.
In Mitre's CVE dictionary: CVE-2022-40303, CVE-2022-40304.
- More information:
It was discovered that libxml2, the GNOME XML library, was vulnerable to integer overflows and memory corruption.
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.
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