USN-675-1: Pidgin vulnerabilities
24 November 2008
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 8.04 LTS
- Ubuntu 7.10
It was discovered that Pidgin did not properly handle certain malformed messages in the MSN protocol handler. A remote attacker could send a specially crafted message and possibly execute arbitrary code with user privileges. (CVE-2008-2927)
It was discovered that Pidgin did not properly handle file transfers containing a long filename and special characters in the MSN protocol handler. A remote attacker could send a specially crafted filename in a file transfer request and cause Pidgin to crash, leading to a denial of service. (CVE-2008-2955)
It was discovered that Pidgin did not impose resource limitations in the UPnP service. A remote attacker could cause Pidgin to download arbitrary files and cause a denial of service from memory or disk space exhaustion. (CVE-2008-2957)
It was discovered that Pidgin did not validate SSL certificates when using a secure connection. If a remote attacker were able to perform a man-in-the-middle attack, this flaw could be exploited to view sensitive information. This update alters Pidgin behaviour by asking users to confirm the validity of a certificate upon initial login. (CVE-2008-3532)
The problem can be corrected by updating your system to the following package versions:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system upgrade you need to restart Pidgin to effect the necessary changes.