USN-2834-1: libxml2 vulnerabilities

Ubuntu Security Notice USN-2834-1

14th December, 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

libxml2 could be made to crash if it opened a specially crafted file.

Software description

  • libxml2 - GNOME XML library

Details

Kostya Serebryany discovered that libxml2 incorrectly handled certain
malformed documents. 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. (CVE-2015-5312,
CVE-2015-7497, CVE-2015-7498, CVE-2015-7499,CVE-2015-7500)

Hugh Davenport discovered that libxml2 incorrectly handled certain
malformed documents. 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. (CVE-2015-8241,
CVE-2015-8242)

Hanno Boeck discovered that libxml2 incorrectly handled certain
malformed documents. 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 applied
to Ubuntu 12.04 LTS, Ubuntu 14.04 LTS and Ubuntu 15.04. (CVE-2015-8317)

Update instructions

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

Ubuntu 15.10:
libxml2 2.9.2+zdfsg1-4ubuntu0.2
Ubuntu 15.04:
libxml2 2.9.2+dfsg1-3ubuntu0.2
Ubuntu 14.04 LTS:
libxml2 2.9.1+dfsg1-3ubuntu4.6
Ubuntu 12.04 LTS:
libxml2 2.7.8.dfsg-5.1ubuntu4.13

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

CVE-2015-5312, CVE-2015-7497, CVE-2015-7498, CVE-2015-7499, CVE-2015-7500, CVE-2015-8241, CVE-2015-8242, CVE-2015-8317