RHSA-2008:0192 - Security Advisory

Topic

Updated cups packages that fix multiple security issues are now available
for Red Hat Enterprise Linux 5.

This update has been rated as having moderate security impact by the Red
Hat Security Response Team.

Description

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

A heap buffer overflow flaw was found in a CUPS administration interface
CGI script. A local attacker able to connect to the IPP port (TCP port 631)
could send a malicious request causing the script to crash or, potentially,
execute arbitrary code as the "lp" user. Please note: the default CUPS
configuration in Red Hat Enterprise Linux 5 does not allow remote
connections to the IPP TCP port. (CVE-2008-0047)

Red Hat would like to thank "regenrecht" for reporting this issue.

This issue did not affect the versions of CUPS as shipped with Red Hat
Enterprise Linux 3 or 4.

Two overflows were discovered in the HP-GL/2-to-PostScript filter. An
attacker could create a malicious HP-GL/2 file that could possibly execute
arbitrary code as the "lp" user if the file is printed. (CVE-2008-0053)

A buffer overflow flaw was discovered in the GIF decoding routines used by
CUPS image converting filters "imagetops" and "imagetoraster". An attacker
could create a malicious GIF file that could possibly execute arbitrary
code as the "lp" user if the file was printed. (CVE-2008-1373)

All cups users are advised to upgrade to these updated packages, which
contain backported patches to resolve these issues.

Solution

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

This update is available via Red Hat Network. Details on how to use
the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/FAQ_58_10188

Affected Products

• Red Hat Enterprise Linux Server 5 x86_64
• Red Hat Enterprise Linux Server 5 ia64
• Red Hat Enterprise Linux Server 5 i386
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 5.1 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 5.1 ia64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 5.1 i386
• Red Hat Enterprise Linux Workstation 5 x86_64
• Red Hat Enterprise Linux Workstation 5 i386
• Red Hat Enterprise Linux Desktop 5 x86_64
• Red Hat Enterprise Linux Desktop 5 i386
• Red Hat Enterprise Linux for IBM z Systems 5 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 5.1 s390x
• Red Hat Enterprise Linux for Power, big endian 5 ppc
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 5.1 ppc
• Red Hat Enterprise Linux Server from RHUI 5 x86_64
• Red Hat Enterprise Linux Server from RHUI 5 i386

Fixes

• BZ - 436153 - CVE-2008-0047 cups: heap based buffer overflow in cgiCompileSearch()
• BZ - 438117 - CVE-2008-0053 cups: buffer overflows in HP-GL/2 filter
• BZ - 438303 - CVE-2008-1373 cups: overflow in gif image filter

CVEs

• CVE-2008-0053
• CVE-2008-1373
• CVE-2008-0047

References

• http://www.redhat.com/security/updates/classification/#moderate