High risk vulnerability in Symantec Messaging Gateway 18 September 2012 Ben Williams of NCC Group has discovered a high risk vulnerability in Symantec Messaging Gateway Impact: Addition of a backdoor administrator via CSRF Versions affected: Symantec Messaging Gateway 9.5.3-3 An updated version of the software has been released to address the vulnerability: http://www.symantec.com/security_response/securityupdates/detail.jsp?fid=security_advisory&pvid=security_advisory&year=2012&suid=20120827_00 NCC Group is going to withhold details of this flaw for three months. This three month window will allow users the time needed to apply the patch before the details are released to the general public. This reflects the NCC Group approach to responsible disclosure. NCC Group Research http://www.nccgroup.com