The agent remote upgrade interface in Symantec Enterprise Security Manager (ESM) before 20070405 does not verify the authenticity of upgrades, which allows remote attackers to execute arbitrary code via software that implements the agent upgrade protocol.
http://www.vupen.com/english/advisories/2007/1277
http://www.symantec.com/avcenter/security/Content/2007.04.05d.html
http://www.securitytracker.com/id?1017881