Amazon Linux AMI Security Advisory: ALAS-2014-286
Advisory Release Date: 2014-09-16 22:30 Pacific
A flaw was found in the way Augeas handled certain umask settings when creating new configuration files. This flaw could result in configuration files being created as world writable, allowing unprivileged local users to modify their content. (CVE-2013-6412 )
Run yum update augeas to update your system.