Amazon Linux AMI Security Advisory: ALAS-2012-61
Advisory Release Date: 2014-09-14 15:45 Pacific
Multiple flaws were found in the way RPM parsed package file headers. An attacker could create a specially-crafted RPM package that, when its package header was accessed, or during package signature verification, could cause an application using the RPM library (such as the rpm command line tool, or the yum and up2date package managers) to crash or, potentially, execute arbitrary code. (CVE-2012-0060 , CVE-2012-0061 , CVE-2012-0815 )
Run yum update rpm to update your system.