USN-2812-1: libxml2 vulnerabilities

16 November 2015

libxml2 vulnerabilities

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

  • Ubuntu 15.10
  • Ubuntu 15.04
  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS

Summary

Several security issues were fixed in libxml2.

Software Description

  • libxml2 - GNOME XML library

Details

Florian Weimer discovered that libxml2 incorrectly handled certain XML data. If a user or automated system were tricked into opening a specially crafted document, an attacker could possibly cause resource consumption, resulting in a denial of service. This issue only affected Ubuntu 12.04 LTS, Ubuntu 14.04 LTS and Ubuntu 15.04. (CVE-2015-1819)

Michal Zalewski discovered that libxml2 incorrectly handled certain XML data. If a user or automated system were tricked into opening a specially crafted document, an attacker could possibly cause libxml2 to crash, resulting in a denial of service. This issue only affected Ubuntu 12.04 LTS, Ubuntu 14.04 LTS and Ubuntu 15.04. (CVE-2015-7941)

Kostya Serebryany discovered that libxml2 incorrectly handled certain XML data. If a user or automated system were tricked into opening a specially crafted document, an attacker could possibly cause libxml2 to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2015-7942)

Gustavo Grieco discovered that libxml2 incorrectly handled certain XML data. If a user or automated system were tricked into opening a specially crafted document, an attacker could possibly cause libxml2 to crash, resulting in a denial of service. This issue only affected Ubuntu 14.04 LTS. (CVE-2015-8035)

Update instructions

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

Ubuntu 15.10
libxml2 - 2.9.2+zdfsg1-4ubuntu0.1
Ubuntu 15.04
libxml2 - 2.9.2+dfsg1-3ubuntu0.1
Ubuntu 14.04 LTS
libxml2 - 2.9.1+dfsg1-3ubuntu4.5
Ubuntu 12.04 LTS
libxml2 - 2.7.8.dfsg-5.1ubuntu4.12

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

After a standard system update you need to reboot your computer to make all the necessary changes.

References