libtiff security update

Updated libtiff packages that fix various buffer and integer overflows are
now available.

The libtiff package contains a library of functions for manipulating TIFF
(Tagged Image File Format) image format files. TIFF is a widely used file
format for bitmapped images.

During a source code audit, Chris Evans discovered a number of integer
overflow bugs that affect libtiff. An attacker who has the ability to trick
a user into opening a malicious TIFF file could cause the application
linked to libtiff to crash or possibly execute arbitrary code. The Common
Vulnerabilities and Exposures project (cve.mitre.org) has assigned the
names CAN-2004-0886 and CAN-2004-0804 to these issues.

Additionally, a number of buffer overflow bugs that affect libtiff have
been found. An attacker who has the ability to trick a user into opening a
malicious TIFF file could cause the application linked to libtiff to crash
or possibly execute arbitrary code. The Common Vulnerabilities and
Exposures project (cve.mitre.org) has assigned the name CAN-2004-0803 to
this issue.

All users are advised to upgrade to these errata packages, which contain
fixes for these issues.

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied. Use Red Hat
Network to download and update your packages. To launch the Red Hat
Update Agent, use the following command:

up2date

For information on how to install packages manually, refer to the
following Web page for the System Administration or Customization
guide specific to your system:

http://www.redhat.com/docs/manuals/enterprise/

134847 - CAN-2004-0803 buffer overflows in libtiff
134850 - CAN-2004-0886 multiple integer overflows in libtiff

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-0803
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-0804
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-0886
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-1307