cups security update

Updated cups packages that fix a denial of service vulnerability are now
available.

The Common UNIX Printing System (CUPS) is a print spooler.

Alvaro Martinez Echevarria reported a bug in the CUPS Internet Printing
Protocol (IPP) implementation in versions of CUPS prior to 1.1.21. An
attacker could send a carefully crafted UDP packet to the IPP port which
could cause CUPS to stop listening to the port and result in a denial of
service. In order to exploit this bug, an attacker would need to have the
ability to send a UDP packet to the IPP port (by default 631). The
Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned
the name CAN-2004-0558 to this issue.

All users of cups should upgrade to these updated packages, which contain a
backported patch as well as a fix for a non-exploitable off-by-one bug.

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied. Use Red Hat
Network to download and update your packages. To launch the Red Hat
Update Agent, use the following command:

up2date

For information on how to install packages manually, refer to the
following Web page for the System Administration or Customization
guide specific to your system:

http://www.redhat.com/docs/manuals/enterprise/

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-0558
http://www.cups.org/str.php?L863

DoS