Buffer overflows in protegrity.dll of Protegrity Secure.Data Extension Feature (SEF) before 2.2.3.9 allow attackers with SQL access to execute arbitrary code via the extended stored procedures (1) xp_pty_checkusers, (2) xp_pty_insert, or (3) xp_pty_select.
http://www.securityfocus.com/bid/7085
http://www.securityfocus.com/bid/7084
http://www.securityfocus.com/bid/7083
http://www.kb.cert.org/vuls/id/247545