CVE-2019-10923 : Security Advisory and Response

A vulnerability has been discovered in various Siemens products, potentially leading to denial of service attacks.

Understanding CVE-2019-10923

This CVE affects a wide range of Siemens products, including SIMATIC S7-400 CPUs, SCALANCE X-200IRT switch family, and SINAMICS control units.

What is CVE-2019-10923?

The vulnerability allows an attacker with network access to disrupt real-time synchronization in affected Siemens products, leading to denial of service.

The Impact of CVE-2019-10923

The vulnerability poses a high severity risk (CVSS base score: 7.5) as it can result in a denial of service attack on the affected systems.

Technical Details of CVE-2019-10923

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability allows attackers to disrupt real-time synchronization in various Siemens products, potentially causing a denial of service.

Affected Systems and Versions

SIMATIC S7-400 CPUs (multiple models)
SCALANCE X-200IRT switch family
Various SINAMICS control units

Exploitation Mechanism

Attackers with network access to affected products can exploit the vulnerability to disrupt real-time synchronization, leading to a denial of service.

Mitigation and Prevention

Protecting systems from CVE-2019-10923 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply patches or updates provided by Siemens.
Implement network segmentation to limit access to vulnerable systems.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update and patch all Siemens products.
Conduct security assessments and audits to identify vulnerabilities.
Train employees on cybersecurity best practices.

Patching and Updates

Siemens may release patches or updates to address the vulnerability. Stay informed through Siemens' official channels.