RHSA-2008:0848 - Security Advisory

Topic

Updated libtiff packages that fix various security issues and a bug are now
available for Red Hat Enterprise Linux 4.

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

Description

The libtiff packages contain a library of functions for manipulating Tagged
Image File Format (TIFF) files.

Multiple uses of uninitialized values were discovered in libtiff's
Lempel-Ziv-Welch (LZW) compression algorithm decoder. An attacker could
create a carefully crafted LZW-encoded TIFF file that would cause an
application linked with libtiff to crash or, possibly, execute arbitrary
code. (CVE-2008-2327)

Red Hat would like to thank Drew Yao of the Apple Product Security team for
reporting this issue.

A buffer overflow flaw was discovered in the tiff2pdf conversion program
distributed with libtiff. An attacker could create a TIFF file containing
UTF-8 characters that would, when converted to PDF format, cause tiff2pdf
to crash, or, possibly, execute arbitrary code. (CVE-2006-2193)

Additionally, these updated packages fix the following bug:

• the libtiff packages included manual pages for the sgi2tiff and tiffsv

commands, which are not included in these packages. These extraneous manual
pages were removed.

All libtiff 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 4 x86_64
• Red Hat Enterprise Linux Server 4 ia64
• Red Hat Enterprise Linux Server 4 i386
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 4.7 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 4.7 ia64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 4.7 i386
• Red Hat Enterprise Linux Workstation 4 x86_64
• Red Hat Enterprise Linux Workstation 4 ia64
• Red Hat Enterprise Linux Workstation 4 i386
• Red Hat Enterprise Linux Desktop 4 x86_64
• Red Hat Enterprise Linux Desktop 4 i386
• Red Hat Enterprise Linux for IBM z Systems 4 s390x
• Red Hat Enterprise Linux for IBM z Systems 4 s390
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 4.7 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 4.7 s390
• Red Hat Enterprise Linux for Power, big endian 4 ppc
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 4.7 ppc

Fixes

• BZ - 194362 - CVE-2006-2193 tiff2pdf buffer overflow
• BZ - 458674 - CVE-2008-2327 libtiff: use of uninitialized memory in LZW decoder
• BZ - 459404 - [RHEL4] libtiff has unnecessary man pages.

CVEs

• CVE-2008-2327
• CVE-2006-2193

References

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