Vulnerability CVE-2016-3949
Published: 2016-06-27

Description:
Siemens SIMATIC S7-300 Profinet-enabled CPU devices with firmware before 3.2.12 and SIMATIC S7-300 Profinet-disabled CPU devices with firmware before 3.3.12 allow remote attackers to cause a denial of service (defect-mode transition) via crafted (1) ISO-TSAP or (2) Profibus packets.

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

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.8/10
6.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Complete
Affected software
Siemens -> Simatic s7-300 with profitnet support firmware 
Siemens -> Simatic s7-300 without profitnet support firmware 

 References:
http://www.securitytracker.com/id/1036089
http://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-818183.pdf
https://ics-cert.us-cert.gov/advisories/ICSA-16-161-01
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