Moodle Improper Input Validation Vulnerability - CVE-2012-6087
repository/s3/S3.php in the Amazon S3 library in Moodle through 2.2.11 2.3.x before 2.3.9 2.4.x before 2.4.6 and 2.5.x before 2.5.2 does not verify that the server hostname matches a domain name in the subject39s Common Name (CN) or subjectAltName field of the X.509 certificate which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate related to an incorrect CURLOPT_SSL_VERIFYHOST value.