(RHSA-2005:019) libtiff security update

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.