Ubuntu Security Notice USN-1273-1
21st 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 - graphical multi-protocol instant messaging client for X
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 version:
- 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.