CVE-2017-6867 : Vulnerability Insights and Analysis

Siemens SIMATIC WinCC software versions V7.3 (prior to Upd 11) and V7.4 (prior to SP1), SIMATIC WinCC Runtime Professional versions V13 (prior to SP2) and V14 (prior to SP1), and SIMATIC WinCC (TIA Portal) Professional versions V13 (prior to SP2) and V14 (prior to SP1) are affected by a security flaw that could allow an authenticated attacker to disrupt services.

Understanding CVE-2017-6867

A vulnerability in Siemens SIMATIC WinCC software versions that could enable an authenticated attacker to disrupt services.

What is CVE-2017-6867?

Siemens SIMATIC WinCC software versions V7.3, V7.4, SIMATIC WinCC Runtime Professional V13, V14, and SIMATIC WinCC (TIA Portal) Professional V13, V14 are vulnerable to a flaw that could be exploited by an authenticated attacker.

The Impact of CVE-2017-6867

The vulnerability could allow an authenticated attacker, part of the "administrators" group, to disrupt services by sending crafted messages to the DCOM interface.

Technical Details of CVE-2017-6867

Siemens SIMATIC WinCC software vulnerability details.

Vulnerability Description

The flaw allows an authenticated attacker to disrupt services by sending specific messages to the DCOM interface.

Affected Systems and Versions

Siemens SIMATIC WinCC V7.3 (prior to Upd 11) and V7.4 (prior to SP1)
SIMATIC WinCC Runtime Professional V13 (prior to SP2) and V14 (prior to SP1)
SIMATIC WinCC (TIA Portal) Professional V13 (prior to SP2) and V14 (prior to SP1)

Exploitation Mechanism

The vulnerability can be exploited by an authenticated attacker with membership in the "administrators" group.

Mitigation and Prevention

Steps to mitigate and prevent the CVE-2017-6867 vulnerability.

Immediate Steps to Take

Apply the necessary security updates provided by Siemens.
Restrict network access to affected systems.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update and patch all software and systems.
Implement the principle of least privilege to limit user access.
Conduct regular security training for employees.

Patching and Updates

Ensure all affected systems are updated with the latest patches from Siemens.