Information disclosure in Siemens SIMATIC STEP 7



| Updated: 2016-10-14
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2016-7960
CWE-ID CWE-310
Exploitation vector Local
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
 SIMATIC STEP 7
Server applications / SCADA systems

Vendor Siemens

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Information disclosure

EUVDB-ID: #VU995

Risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2016-7960

CWE-ID: CWE-310 - Cryptographic Issues

Exploit availability: No

Description

The vulnerability allows a local user to obtain potentially sensitive configuration settings on the target system.
The weakness is due to cryptographic issues that lets attacker bypass protection of the transport format of TIA Portal project files and view important files.
Successful exploitation of the vulnerability results in disclosure of potentially sensitive data on the vulnerable system.

Mitigation

Update to version 14.

Vulnerable software versions

SIMATIC STEP 7: 1.0 - 13

CPE2.3 External links

https://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-869766.pdf


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.



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