Vulnerability CVE-2016-9158
Published: 2016-12-16   Modified: 2016-12-17

Description:
A vulnerability has been identified in SIMATIC S7-300 CPU family, SIMATIC S7-400 V6 and earlier CPU family, SIMATIC S7-400 V7 CPU family. Specially crafted packets sent to port 80/tcp could cause the affected devices to go into defect mode. A cold restart is required to recover the system. This vulnerability affects all SIMATIC S7-300 PN CPUs, and all SIMATIC S7-400 PN V6 and V7 CPUs.

Type:

CWE-20

 (Improper Input Validation)

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 cpu firmware 
Siemens -> Simatic s7-400 cpu firmware 

 References:
http://www.securityfocus.com/bid/94820
http://www.securitytracker.com/id/1037434
https://ics-cert.us-cert.gov/advisories/ICSA-16-348-05
https://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-731239.pdf
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