Amazon Linux AMI Security Advisory: ALAS-2011-29
Advisory Release Date: 2014-09-14 15:07 Pacific
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.
Run yum update jasper to update your system.