Amazon Linux AMI Security Advisory: ALAS-2016-714
Advisory Release Date: 2016-06-15 13:30 Pacific
It was reported that +CIPHER operator in OpenSSL changes the order of a cipher. Instead of returning an error (as NSS does not support cipher ordering), it returned the result of processing up to that point, which could result in requested ciphers not being enabled.
Run yum update mod24_nss to update your system.