Debian LTS: DLA-3172-1: libxml2 security update | LinuxSecurity.com
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Debian LTS Advisory DLA-3172-1                [email protected]
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

Debian LTS: DLA-3172-1: libxml2 security update

October 30, 2022
It was discovered that libxml2, the GNOME XML library, was vulnerable to integer overflows and memory corruption

Summary


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

Severity
Package : libxml2
Version : 2.9.4+dfsg1-7+deb10u5
CVE ID : CVE-2022-40303 CVE-2022-40304
Debian Bug : 1022224 1022225

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