====================================================================                   Red Hat Security Advisory

Synopsis:          Low: cups security and bug fix update
Advisory ID:       RHSA-2011:1635-03
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2011:1635.html
Issue date:        2011-12-06
CVE Names:         CVE-2011-2896 
====================================================================
1. Summary:

Updated cups packages that fix one security issue and several bugs are now
available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having low
security impact. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available from the CVE link in
the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64
Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64
Red Hat Enterprise Linux HPC Node (v. 6) - x86_64
Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64
Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64

3. Description:

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

A heap-based buffer overflow flaw was found in the Lempel-Ziv-Welch (LZW)
decompression algorithm implementation used by the CUPS GIF image format
reader. An attacker could create a malicious GIF image file that, when
printed, could possibly cause CUPS to crash or, potentially, execute
arbitrary code with the privileges of the "lp" user. (CVE-2011-2896)

These updated cups packages also provide fixes for the following bugs:

* Previously CUPS was not correctly handling the language setting
LANG=en_US.ASCII. As a consequence lpadmin, lpstat and lpinfo binaries were
not displaying any output when the LANG=en_US.ASCII environment variable
was used. As a result of this update the problem is fixed and the expected
output is now displayed. (BZ#681836)

* Previously the scheduler did not check for empty values of several
configuration directives. As a consequence it was possible for the CUPS
daemon (cupsd) to crash when a configuration file contained certain empty
values. With this update the problem is fixed and cupsd no longer crashes
when reading such a configuration file. (BZ#706673)

* Previously when printing to a raw print queue, when using certain printer
models, CUPS was incorrectly sending SNMP queries. As a consequence there
was a noticeable 4-second delay between queueing the job and the start of
printing. With this update the problem is fixed and CUPS no longer tries to
collect SNMP supply and status information for raw print queues.
(BZ#709896)

* Previously when using the BrowsePoll directive it could happen that the
CUPS printer polling daemon (cups-polld) began polling before the network
interfaces were set up after a system boot. CUPS was then caching the
failed hostname lookup. As a consequence no printers were found and the
error, "Host name lookup failure", was logged. With this update the code
that re-initializes the resolver after failure in cups-polld is fixed and
as a result CUPS will obtain the correct network settings to use in printer
discovery. (BZ#712430)

* The MaxJobs directive controls the maximum number of print jobs that are
kept in memory. Previously, once the number of jobs reached the limit, the
CUPS system failed to automatically purge the data file associated with the
oldest completed job from the system in order to make room for a new print
job. This bug has been fixed, and the jobs beyond the set limit are now
properly purged. (BZ#735505)

* The cups init script (/etc/rc.d/init.d/cups) uses the daemon function
(from /etc/rc.d/init.d/functions) to start the cups process, but previously
it did not source a configuration file from the /etc/sysconfig/ directory.
As a consequence, it was difficult to cleanly set the nice level or cgroup
for the cups daemon by setting the NICELEVEL or CGROUP_DAEMON variables.
With this update, the init script is fixed. (BZ#744791)

All users of CUPS are advised to upgrade to these updated packages, which
contain backported patches to resolve these issues. After installing this
update, the cupsd daemon will be restarted automatically.

4. Solution:

Before applying this update, make sure all previously-released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/kb/docs/DOC-11259

5. Bugs fixed (http://bugzilla.redhat.com/):

681836 - lpstat bug with ASCII encoding, LANG=en_US.ASCII lpstat -h localhost -s
706673 - Cups config parsing segfault
712430 - printers are not found after system boot
727800 - CVE-2011-2896 David Koblas' GIF decoder LZW decoder buffer overflow
735505 - CUPS is not purging JobFiles when MaxJobs is reached in RHEL6.1
744791 - cups init script should source /etc/sysconfig/cups

6. Package List:

Red Hat Enterprise Linux Desktop (v. 6):

Source:

i386:
cups-1.4.2-44.el6.i686.rpm
cups-debuginfo-1.4.2-44.el6.i686.rpm
cups-libs-1.4.2-44.el6.i686.rpm
cups-lpd-1.4.2-44.el6.i686.rpm

x86_64:
cups-1.4.2-44.el6.x86_64.rpm
cups-debuginfo-1.4.2-44.el6.i686.rpm
cups-debuginfo-1.4.2-44.el6.x86_64.rpm
cups-libs-1.4.2-44.el6.i686.rpm
cups-libs-1.4.2-44.el6.x86_64.rpm
cups-lpd-1.4.2-44.el6.x86_64.rpm

Red Hat Enterprise Linux Desktop Optional (v. 6):

Source:

i386:
cups-debuginfo-1.4.2-44.el6.i686.rpm
cups-devel-1.4.2-44.el6.i686.rpm
cups-php-1.4.2-44.el6.i686.rpm

x86_64:
cups-debuginfo-1.4.2-44.el6.i686.rpm
cups-debuginfo-1.4.2-44.el6.x86_64.rpm
cups-devel-1.4.2-44.el6.i686.rpm
cups-devel-1.4.2-44.el6.x86_64.rpm
cups-php-1.4.2-44.el6.x86_64.rpm

Red Hat Enterprise Linux HPC Node (v. 6):

Source:

x86_64:
cups-1.4.2-44.el6.x86_64.rpm
cups-debuginfo-1.4.2-44.el6.i686.rpm
cups-debuginfo-1.4.2-44.el6.x86_64.rpm
cups-libs-1.4.2-44.el6.i686.rpm
cups-libs-1.4.2-44.el6.x86_64.rpm
cups-lpd-1.4.2-44.el6.x86_64.rpm

Red Hat Enterprise Linux HPC Node Optional (v. 6):

Source:

x86_64:
cups-debuginfo-1.4.2-44.el6.i686.rpm
cups-debuginfo-1.4.2-44.el6.x86_64.rpm
cups-devel-1.4.2-44.el6.i686.rpm
cups-devel-1.4.2-44.el6.x86_64.rpm
cups-php-1.4.2-44.el6.x86_64.rpm

Red Hat Enterprise Linux Server (v. 6):

Source:

i386:
cups-1.4.2-44.el6.i686.rpm
cups-debuginfo-1.4.2-44.el6.i686.rpm
cups-devel-1.4.2-44.el6.i686.rpm
cups-libs-1.4.2-44.el6.i686.rpm
cups-lpd-1.4.2-44.el6.i686.rpm

ppc64:
cups-1.4.2-44.el6.ppc64.rpm
cups-debuginfo-1.4.2-44.el6.ppc.rpm
cups-debuginfo-1.4.2-44.el6.ppc64.rpm
cups-devel-1.4.2-44.el6.ppc.rpm
cups-devel-1.4.2-44.el6.ppc64.rpm
cups-libs-1.4.2-44.el6.ppc.rpm
cups-libs-1.4.2-44.el6.ppc64.rpm
cups-lpd-1.4.2-44.el6.ppc64.rpm

s390x:
cups-1.4.2-44.el6.s390x.rpm
cups-debuginfo-1.4.2-44.el6.s390.rpm
cups-debuginfo-1.4.2-44.el6.s390x.rpm
cups-devel-1.4.2-44.el6.s390.rpm
cups-devel-1.4.2-44.el6.s390x.rpm
cups-libs-1.4.2-44.el6.s390.rpm
cups-libs-1.4.2-44.el6.s390x.rpm
cups-lpd-1.4.2-44.el6.s390x.rpm

x86_64:
cups-1.4.2-44.el6.x86_64.rpm
cups-debuginfo-1.4.2-44.el6.i686.rpm
cups-debuginfo-1.4.2-44.el6.x86_64.rpm
cups-devel-1.4.2-44.el6.i686.rpm
cups-devel-1.4.2-44.el6.x86_64.rpm
cups-libs-1.4.2-44.el6.i686.rpm
cups-libs-1.4.2-44.el6.x86_64.rpm
cups-lpd-1.4.2-44.el6.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 6):

Source:

i386:
cups-debuginfo-1.4.2-44.el6.i686.rpm
cups-php-1.4.2-44.el6.i686.rpm

ppc64:
cups-debuginfo-1.4.2-44.el6.ppc64.rpm
cups-php-1.4.2-44.el6.ppc64.rpm

s390x:
cups-debuginfo-1.4.2-44.el6.s390x.rpm
cups-php-1.4.2-44.el6.s390x.rpm

x86_64:
cups-debuginfo-1.4.2-44.el6.x86_64.rpm
cups-php-1.4.2-44.el6.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:

i386:
cups-1.4.2-44.el6.i686.rpm
cups-debuginfo-1.4.2-44.el6.i686.rpm
cups-devel-1.4.2-44.el6.i686.rpm
cups-libs-1.4.2-44.el6.i686.rpm
cups-lpd-1.4.2-44.el6.i686.rpm

x86_64:
cups-1.4.2-44.el6.x86_64.rpm
cups-debuginfo-1.4.2-44.el6.i686.rpm
cups-debuginfo-1.4.2-44.el6.x86_64.rpm
cups-devel-1.4.2-44.el6.i686.rpm
cups-devel-1.4.2-44.el6.x86_64.rpm
cups-libs-1.4.2-44.el6.i686.rpm
cups-libs-1.4.2-44.el6.x86_64.rpm
cups-lpd-1.4.2-44.el6.x86_64.rpm

Red Hat Enterprise Linux Workstation Optional (v. 6):

Source:

i386:
cups-debuginfo-1.4.2-44.el6.i686.rpm
cups-php-1.4.2-44.el6.i686.rpm

x86_64:
cups-debuginfo-1.4.2-44.el6.x86_64.rpm
cups-php-1.4.2-44.el6.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2011-2896.html
https://access.redhat.com/security/updates/classification/#low

8. Contact:

The Red Hat security contact is .  More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2011 Red Hat, Inc.