Updated cups packages that fix a security issue are now available for Red
Hat Enterprise Linux 3, Red Hat Enterprise Linux 4, and Red Hat Enterprise
This update has been rated as having moderate security impact by the Red
Hat Security Response Team.
The Common UNIX Printing System (CUPS) provides a portable printing layer
for UNIX operating systems.
An integer overflow flaw leading to a heap buffer overflow was discovered
in the Portable Network Graphics (PNG) decoding routines used by the CUPS
image converting filters "imagetops" and "imagetoraster". An attacker could
create a malicious PNG file that could possibly execute arbitrary code as
the "lp" user if the file was printed. (CVE-2008-1722)
All CUPS users are advised to upgrade to these updated packages, which
contain backported patch to resolve this issue.