Vulnerability CVE-2011-4514
Published: 2012-02-03   Modified: 2012-02-13

Description:
The TELNET daemon in Siemens WinCC flexible 2004, 2005, 2007, and 2008; WinCC V11 (aka TIA portal); the TP, OP, MP, Comfort Panels, and Mobile Panels SIMATIC HMI panels; WinCC V11 Runtime Advanced; and WinCC flexible Runtime does not perform authentication, which makes it easier for remote attackers to obtain access via a TCP session.

CVSS2 => (AV:N/AC:L/Au:N/C:C/I:C/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
10/10
10/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Complete
Complete
Complete
Affected software
Siemens -> Simatic hmi panels 
Siemens -> Wincc 
Siemens -> Wincc flexible 
Siemens -> Wincc flexible runtime 
Siemens -> Wincc runtime advanced 

 References:
http://www.us-cert.gov/control_systems/pdf/ICSA-12-030-01.pdf
http://www.siemens.com/corporate-technology/pool/de/forschungsfelder/siemens_security_advisory_ssa-345442.pdf
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