CVE-2021-31890 : What You Need to Know
Discover the impact of CVE-2021-31890 on Siemens products like APOGEE MBC, MEC, PXC, Nucleus NET, and more. Learn about the security risk posed by unchecked TCP payload lengths and the necessary mitigation steps.
A vulnerability has been identified in several Siemens products, including APOGEE MBC, APOGEE MEC, APOGEE PXC, Desigo PXC, Capital VSTAR, Nucleus NET, SIMOTICS CONNECT, TALON TC, and more. The issue arises due to the unchecked total length of a TCP payload, potentially leading to Information Leak and Denial-of-Service conditions.
Understanding CVE-2021-31890
This CVE highlights a security flaw in Siemens products that could have serious consequences if exploited.
What is CVE-2021-31890?
The unchecked total length of a TCP payload in Siemens products can result in Information Leak and Denial-of-Service conditions, creating a significant security risk.
The Impact of CVE-2021-31890
The vulnerability could be exploited by threat actors to leak sensitive information or disrupt services, posing a threat to the security and availability of affected systems.
Technical Details of CVE-2021-31890
The vulnerability (FSMD-2021-0017) is categorized under CWE-240: Improper Handling of Inconsistent Structural Elements.
Vulnerability Description
The total length of a TCP payload is unchecked, which may have severe consequences like Information Leak and Denial-of-Service conditions.
Affected Systems and Versions
Multiple Siemens products across various versions are affected, including APOGEE MBC, MEC, PXC, Desigo, Capital VSTAR, Nucleus NET, and SIMOTICS CONNECT.
Exploitation Mechanism
The issue arises due to the lack of proper validation of TCP payload lengths, potentially allowing threat actors to exploit this flaw.
Mitigation and Prevention
Taking immediate steps and adopting long-term security practices are crucial to mitigate the risks associated with CVE-2021-31890.
Immediate Steps to Take
Affected users should apply security patches provided by Siemens promptly and implement necessary security measures to prevent exploitation.
Long-Term Security Practices
Regularly update and patch affected systems, monitor network traffic for any anomalies, and follow cybersecurity best practices to enhance overall security posture.
Patching and Updates
Refer to Siemens product security advisories (SSAs) for specific patch and update information to address CVE-2021-31890.