Schneider Electric OPC Factory Server (OFS) < 3.5 SP1 ActiveX Object Multiple Buffer Overflows DoS
High Nessus Plugin ID 83187
SynopsisThe remote host is affected by a denial of service vulnerability.
DescriptionThe Schneider Electric OPC Factory Server installed on the remote host is prior to version 3.5 SP1. It is, therefore, affected by a denial of service vulnerability due to multiple buffer overflow errors in the 'opcautosa2.dll' ActiveX control. The buffer overflows are due to improper validation of user-supplied input when handling long arguments in the Connect() and GetOPCServers() functions. A remote attacker can exploit this, via a specially crafted web page, to reboot the server, resulting in a denial of service.
SolutionUpgrade to Schneider Electric OPC Factory Server (OFS) version 3.5 SP1 or later.