RHSA-2009:0429

Problem Description:

Updated cups packages that fix multiple security issues are now available
for Red Hat Enterprise Linux 4 and 5.

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

2. Relevant releases/architectures:

RHEL Desktop Workstation (v. 5 client) - i386, x86_64
Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64
Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, x86_64
Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64
Red Hat Enterprise Linux Desktop version 4 - i386, x86_64
Red Hat Enterprise Linux ES version 4 - i386, ia64, x86_64
Red Hat Enterprise Linux WS version 4 - i386, ia64, x86_64

3. Description:

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

Multiple integer overflow flaws were found in the CUPS JBIG2 decoder. An
attacker could create a malicious PDF file that would cause CUPS to crash
or, potentially, execute arbitrary code as the "lp" user if the file was
printed. (CVE-2009-0147, CVE-2009-1179)

Multiple buffer overflow flaws were found in the CUPS JBIG2 decoder. An
attacker could create a malicious PDF file that would cause CUPS to crash
or, potentially, execute arbitrary code as the "lp" user if the file was
printed. (CVE-2009-0146, CVE-2009-1182)

Multiple flaws were found in the CUPS JBIG2 decoder that could lead to the
freeing of arbitrary memory. An attacker could create a malicious PDF file
that would cause CUPS to crash or, potentially, execute arbitrary code
as the "lp" user if the file was printed. (CVE-2009-0166, CVE-2009-1180)

Multiple input validation flaws were found in the CUPS JBIG2 decoder. An
attacker could create a malicious PDF file that would cause CUPS to crash
or, potentially, execute arbitrary code as the "lp" user if the file was
printed. (CVE-2009-0800)

An integer overflow flaw, leading to a heap-based buffer overflow, was
discovered in the Tagged Image File Format (TIFF) decoding routines used by
the CUPS image-converting filters, "imagetops" and "imagetoraster". An
attacker could create a malicious TIFF file that could, potentially,
execute arbitrary code as the "lp" user if the file was printed.
(CVE-2009-0163)

Multiple denial of service flaws were found in the CUPS JBIG2 decoder. An
attacker could create a malicious PDF file that would cause CUPS to crash
when printed. (CVE-2009-0799, CVE-2009-1181, CVE-2009-1183)

Red Hat would like to thank Aaron Sigel, Braden Thomas and Drew Yao of
the Apple Product Security team, and Will Dormann of the CERT/CC for
responsibly reporting these flaws.

Users of cups are advised to upgrade to these updated packages, which
contain backported patches to correct these issues. After installing the
update, the cupsd daemon will be restarted automatically.

4. 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/docs/DOC-11259

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

490596 - CVE-2009-0163 cups: Integer overflow in the TIFF image filter
490612 - CVE-2009-0146 xpdf: Multiple buffer overflows in JBIG2 decoder (setBitmap, readSymbolDictSeg)
490614 - CVE-2009-0147 xpdf: Multiple integer overflows in JBIG2 decoder
490625 - CVE-2009-0166 xpdf: Freeing of potentially uninitialized memory in JBIG2 decoder
491864 - Multiple PDF flaws
495886 - CVE-2009-0799 PDF JBIG2 decoder OOB read
495887 - CVE-2009-0800 PDF JBIG2 multiple input validation flaws
495889 - CVE-2009-1179 PDF JBIG2 integer overflow
495892 - CVE-2009-1180 PDF JBIG2 invalid free()
495894 - CVE-2009-1181 PDF JBIG2 NULL dereference
495896 - CVE-2009-1182 PDF JBIG2 MMR decoder buffer overflows
495899 - CVE-2009-1183 PDF JBIG2 MMR infinite loop DoS