=========================================================================Ubuntu Security Notice USN-1338-1
January 23, 2012

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

- Ubuntu 11.04

Summary:

Rsyslog could be made to crash if it processed a specially crafted log
message.

Software Description:
- rsyslog: Enhanced syslogd

Details:

Peter Eisentraut discovered that Rsyslog would not properly perform input
validation when configured to use imfile. If an attacker were able to
craft messages in a file that Rsyslog monitored, an attacker could cause a
denial of service. The imfile module is disabled by default in Ubuntu.

Update instructions:

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

Ubuntu 11.04:
  rsyslog                         4.6.4-2ubuntu4.2

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-1338-1
  CVE-2011-4623

Package Information:
  https://launchpad.net/ubuntu/+source/rsyslog/4.6.4-2ubuntu4.2