Schneider Electric OPC Factory Server (OFS) < 3.5 SP1 ActiveX Object Multiple Buffer Overflows DoS

This script is Copyright (C) 2015-2017 Tenable Network Security, Inc.


Synopsis :

The remote host is affected by a denial of service vulnerability.

Description :

The 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.

See also :

http://www.nessus.org/u?a0f7b5db
https://ics-cert.us-cert.gov/advisories/ICSA-14-093-01

Solution :

Upgrade to Schneider Electric OPC Factory Server (OFS) version 3.5
SP1 or later.

Risk factor :

High / CVSS Base Score : 7.8
(CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C)

Family: SCADA

Nessus Plugin ID: 83187 ()

Bugtraq ID: 66510

CVE ID: CVE-2014-0789

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