Vulnerability CVE-2011-4879
Published: 2012-02-03   Modified: 2012-02-13

Description:
miniweb.exe in the HMI web server in Siemens WinCC flexible 2004, 2005, 2007, and 2008 before SP3; WinCC V11 (aka TIA portal) before SP2 Update 1; the TP, OP, MP, Comfort Panels, and Mobile Panels SIMATIC HMI panels; WinCC V11 Runtime Advanced; and WinCC flexible Runtime does not properly handle URIs beginning with a 0xfa character, which allows remote attackers to read data from arbitrary memory locations or cause a denial of service (application crash) via a crafted POST request.

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

CVSS Base Score
Impact Subscore
Exploitability Subscore
8.5/10
7.8/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
None
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://xforce.iss.net/xforce/xfdb/71453
http://www.us-cert.gov/control_systems/pdf/ICS-ALERT-11-332-02A.pdf
http://www.us-cert.gov/control_systems/pdf/ICS-ALERT-11-332-02.pdf
http://www.siemens.com/corporate-technology/pool/de/forschungsfelder/siemens_security_advisory_ssa-345442.pdf
http://www.osvdb.org/77384
http://www.exploit-db.com/exploits/18166
http://aluigi.org/adv/winccflex_1-adv.txt
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