libtiff security update

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

The libtiff package contains a library of functions for manipulating TIFF
(Tagged Image File Format) image format files.

iDEFENSE has reported an integer overflow bug that affects 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 name CAN-2004-1308 to this issue.

Dmitry V. Levin reported another integer overflow in the tiffdump
utility. An atacker who has the ability to trick a user into opening a
malicious TIFF file with tiffdump could possibly execute arbitrary code.
The Common Vulnerabilities and Exposures project (cve.mitre.org) has
assigned the name CAN-2004-1183 to this issue.

All users are advised to upgrade to these updated packages, which contain
backported 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/

143505 - CAN-2004-1308 LibTIFF Directory Entry Count Integer Overflow Vulnerability
143577 - libtiff integer overflow.

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-1183
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-1308