Amazon Linux AMI Security Advisory: ALAS-2012-58
Advisory Release Date: 2014-09-14 15:44 Pacific
The ExecShield feature does not properly handle use of many shared libraries by a 32-bit executable file, which makes it easier for context-dependent attackers to bypass the ASLR protection mechanism by leveraging a predictable base address for one of these libraries.
Run yum update kernel to update your system. You will need to reboot your system in order for the new kernel to be running.