cups security update

CentOS Errata and Security Advisory CESA-2007:1020

The Common UNIX Printing System (CUPS) provides a portable printing layer
for UNIX® operating systems.

A flaw was found in the way CUPS handles certain Internet Printing Protocol
(IPP) tags. A remote attacker who is able to connect to the IPP TCP port
could send a malicious request causing the CUPS daemon to crash, or
potentially execute arbitrary code. Please note that the default CUPS
configuration does not allow remote hosts to connect to the IPP TCP port.
(CVE-2007-4351)

Red Hat would like to thank Alin Rad Pop for reporting this issue.

All CUPS users are advised to upgrade to these updated packages, which
contain a backported patch to resolve this issue.

In addition, the following bugs were fixed:

• the CUPS service has been changed to start after sshd, to avoid causing
  delays when logging in when the system is booted.

• the logrotate settings have been adjusted so they do not cause CUPS to
  reload its configuration. This is to avoid re-printing the current job,
  which could occur when it was a long-running job.

• a bug has been fixed in the handling of the If-Modified-Since: HTTP
  header.

• in the LSPP configuration, labels for labeled jobs did not line-wrap.
  This has been fixed.

• an access check in the LSPP configuration has been made more secure.

• the cups-lpd service no longer ignores the “-odocument-format=…”
  option.

• a memory allocation bug has been fixed in cupsd.

• support for UNIX domain sockets authentication without passwords has been
  added.

• in the LSPP configuration, a problem that could lead to cupsd crashing
  has been fixed.

• the error handling in the initscript has been improved.

• The job-originating-host-name attribute was not correctly set for jobs
  submitted via the cups-lpd service. This has been fixed.

• a problem with parsing IPv6 addresses in the configuration file has been
  fixed.

• a problem that could lead to cupsd crashing when it failed to open a
  “file:” URI has been fixed.

Merged security bulletin from advisories:
https://lists.centos.org/pipermail/centos-announce/2007-November/076518.html
https://lists.centos.org/pipermail/centos-announce/2007-November/076519.html

Affected packages:
cups
cups-devel
cups-libs
cups-lpd

Upstream details at:
https://access.redhat.com/errata/RHSA-2007:1020