rdma: multiple vulnerabilities

A denial of service flaw was found in the way ibacm managed reference counts for multicast connections. An attacker could send specially-crafted multicast packets that would cause the ibacm daemon to crash. (CVE-2012-4517)

It was found that the ibacm daemon created some files with world-writable permissions. A local attacker could use this flaw to overwrite the contents of the ibacm.log or ibacm.port file, allowing them to mask certain actions from the log or cause ibacm to run on a non-default port. (CVE-2012-4518)