Advantech / BroadWin WebAccess webvrpcs.exe Service Remote Code Execution (uncredentialed check)

This script is Copyright (C) 2011-2014 Tenable Network Security, Inc.


Synopsis :

The remote host is running a service affected by remote code
execution and information disclosure vulnerabilities.

Description :

The Advantech / BroadWin WebAccess software installed on the remote
Windows host includes an RPC service (webvrpcs.exe) that listens
remotely on TCP port 4592 and reportedly is affected by two
vulnerabilities :

- It suffers from a remote code execution vulnerability.

- It leaks the security code that protects the SCADA node.

Note that these vulnerabilities can reportedly be exploited by an
unauthenticated, remote attacker.

See also :

http://www.nessus.org/u?d44f6112
http://archives.neohapsis.com/archives/bugtraq/2011-03/0215.html
http://broadwin.com/Manual/InstallGuide/InstallGuide.htm

Solution :

Advantech has released WebAccess 7.1 2013.05.30 to mitigate this
vulnerability.

Risk factor :

Critical / CVSS Base Score : 10.0
(CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 10.0
(CVSS2#E:ND/RL:U/RC:ND)
Public Exploit Available : true

Family: SCADA

Nessus Plugin ID: 56995 ()

Bugtraq ID: 47008

CVE ID: CVE-2011-4041