Amazon Linux AMI Security Advisory: ALAS-2014-351
Advisory Release Date: 2014-09-19 10:19 Pacific
It was found that OpenSSL clients and servers could be forced, via a specially crafted handshake packet, to use weak keying material for communication. A man-in-the-middle attacker could use this flaw to decrypt and modify traffic between a client and a server. (CVE-2014-0224 )
Run yum update openssl097a to update your system.