Amazon Linux AMI Security Advisory: ALAS-2014-301
Advisory Release Date: 2014-09-17 22:49 Pacific
It was discovered that GnuTLS did not correctly handle certain errors that could occur during the verification of an X.509 certificate, causing it to incorrectly report a successful verification. An attacker could use this flaw to create a specially crafted certificate that could be accepted by GnuTLS as valid for a site chosen by the attacker. (CVE-2014-0092 )
Run yum update gnutls to update your system.