=========================================================================Ubuntu Security Notice USN-5760-1
December 05, 2022

libxml2 vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.10
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in libxml2.

Software Description:
- libxml2: GNOME XML library

Details:

It was discovered that libxml2 incorrectly handled certain XML files.
An attacker could possibly use this issue to cause a crash.
(CVE-2022-2309)

It was discovered that libxml2 incorrectly handled certain XML files.
An attacker could possibly use this issue to expose sensitive information
or cause a crash. (CVE-2022-40303)

It was discovered that libxml2 incorrectly handled certain XML files.
An attacker could possibly use this issue to execute arbitrary code.
(CVE-2022-40304)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 22.10:
  libxml2                         2.9.14+dfsg-1ubuntu0.1
  libxml2-utils                   2.9.14+dfsg-1ubuntu0.1

Ubuntu 22.04 LTS:
  libxml2                         2.9.13+dfsg-1ubuntu0.2
  libxml2-utils                   2.9.13+dfsg-1ubuntu0.2

Ubuntu 20.04 LTS:
  libxml2                         2.9.10+dfsg-5ubuntu0.20.04.5
  libxml2-utils                   2.9.10+dfsg-5ubuntu0.20.04.5

Ubuntu 18.04 LTS:
  libxml2                         2.9.4+dfsg1-6.1ubuntu1.8
  libxml2-utils                   2.9.4+dfsg1-6.1ubuntu1.8

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-5760-1
  CVE-2022-2309, CVE-2022-40303, CVE-2022-40304

Package Information:
  https://launchpad.net/ubuntu/+source/libxml2/2.9.14+dfsg-1ubuntu0.1
  https://launchpad.net/ubuntu/+source/libxml2/2.9.13+dfsg-1ubuntu0.2
  https://launchpad.net/ubuntu/+source/libxml2/2.9.10+dfsg-5ubuntu0.20.04.5
  https://launchpad.net/ubuntu/+source/libxml2/2.9.4+dfsg1-6.1ubuntu1.8