OpenVAS Administrator 1.2 before 1.2.2 and 1.3 before 1.3.2 allows remote attackers to bypass the OAP authentication restrictions and execute OAP commands via a crafted OAP request for version information, which causes the state to be set to CLIENT_AUTHENTIC.
http://www.openwall.com/lists/oss-security/2013/11/10/2
http://www.openvas.org/OVSA20131108.html
http://lists.wald.intevation.org/pipermail/openvas-announce/2013-November/000157.html