USN-675-1: Pidgin vulnerabilities

Ubuntu Security Notice USN-675-1

24th November, 2008

pidgin vulnerabilities

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

  • Ubuntu 8.04 LTS
  • Ubuntu 7.10

Software description

  • pidgin

Details

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)

Update instructions

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

Ubuntu 8.04 LTS:
pidgin 1:2.4.1-1ubuntu2.2
Ubuntu 7.10:
pidgin 1:2.2.1-1ubuntu4.3

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.

References

CVE-2008-2927, CVE-2008-2955, CVE-2008-2957, CVE-2008-3532