USN-1273-1: Pidgin vulnerabilities

21 November 2011

pidgin vulnerabilities

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

  • Ubuntu 11.04
  • Ubuntu 10.10
  • Ubuntu 10.04 LTS

Summary

Pidgin could be made to crash if it received specially crafted network traffic.

Software Description

  • pidgin - multi-protocol instant messaging client

Details

Marius Wachtler discovered that Pidgin incorrectly handled malformed YMSG messages in the Yahoo! protocol handler. A remote attacker could send a specially crafted message and cause Pidgin to crash, leading to a denial of service. This issue only affected Ubuntu 10.04 LTS and 10.10. (CVE-2011-1091)

Marius Wachtler discovered that Pidgin incorrectly handled HTTP 100 responses in the MSN protocol handler. A remote attacker could send a specially crafted message and cause Pidgin to crash, leading to a denial of service. (CVE-2011-3184)

Diego Bauche Madero discovered that Pidgin incorrectly handled UTF-8 sequences in the SILC protocol handler. A remote attacker could send a specially crafted message and cause Pidgin to crash, leading to a denial of service. (CVE-2011-3594)

Update instructions

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

Ubuntu 11.04
pidgin - 1:2.7.11-1ubuntu2.1
Ubuntu 10.10
pidgin - 1:2.7.3-1ubuntu3.3
Ubuntu 10.04 LTS
pidgin - 1:2.6.6-1ubuntu4.4

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

After a standard system update you need to restart Pidgin to make all the necessary changes.

References