Updated CUPS packages that fixes a security issue are now available.
The Common UNIX Printing System provides a portable printing layer for UNIX(R) operating systems. A buffer overflow flaw was found in the Decrypt::makeFileKey2 function of Xpdf which also affects the CUPS pdftops filter due to a shared codebase. An attacker who has the ability to send a malicious PDF file to a printer could possibly execute arbitrary code as the "lp" user. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2005-0064 to this issue. CentOS believes that the Exec-Shield technology (enabled by default since Update 3) will block attempts to remotely exploit these buffer overflow vulnerabilities on x86 architectures. All users of cups should upgrade to these updated packages, which resolve these issues.