(RHSA-2011:1807) Important: jasper security update

JasPer is an implementation of Part 1 of the JPEG 2000 image compression
standard.

Two heap-based buffer overflow flaws were found in the way JasPer decoded
JPEG 2000 compressed image files. An attacker could create a malicious JPEG
2000 compressed image file that, when opened, would cause applications that
use JasPer (such as Nautilus) to crash or, potentially, execute arbitrary
code. (CVE-2011-4516, CVE-2011-4517)

Red Hat would like to thank Jonathan Foote of the CERT Coordination Center
for reporting these issues.

Users are advised to upgrade to these updated packages, which contain a
backported patch to correct these issues. All applications using the JasPer
libraries (such as Nautilus) must be restarted for the update to take
effect.