CVE-2021-31882 : Vulnerability Insights and Analysis
Discover the details of CVE-2021-31882 affecting Siemens products like APOGEE MBC, APOGEE MEC, Desigo PXC series. Learn about the impact, technical details, affected systems, and mitigation steps.
A vulnerability has been identified in multiple Siemens products including APOGEE MBC, APOGEE MEC, APOGEE PXC Compact, Capital VSTAR, Desigo PXC series, Nucleus NET, Nucleus ReadyStart, and TALON TC series. The vulnerability arises due to the DHCP client application's failure to validate the length of the Domain Name Server IP option when processing DHCP ACK packets, leading to potential Denial-of-Service conditions (FSMD-2021-0011).
Understanding CVE-2021-31882
This section provides an in-depth understanding of the CVE-2021-31882 vulnerability.
What is CVE-2021-31882?
The CVE-2021-31882 vulnerability affects various Siemens products, potentially causing Denial-of-Service conditions due to improper validation by the DHCP client application.
The Impact of CVE-2021-31882
The impact of this vulnerability includes the risk of Denial-of-Service conditions in the affected Siemens products, potentially disrupting their normal operation.
Technical Details of CVE-2021-31882
This section covers the technical details of the CVE-2021-31882 vulnerability.
Vulnerability Description
The vulnerability originates from the DHCP client application's lack of validation for the length of the Domain Name Server IP option in DHCP ACK packets.
Affected Systems and Versions
Multiple Siemens products across different versions are affected, including APOGEE MBC, APOGEE MEC, Desigo PXC series, Nucleus NET, Nucleus ReadyStart, and TALON TC series.
Exploitation Mechanism
The vulnerability can be exploited by attackers to trigger Denial-of-Service conditions by manipulating DHCP ACK packets.
Mitigation and Prevention
This section discusses the mitigation and prevention strategies for CVE-2021-31882.
Immediate Steps to Take
Immediately update the affected Siemens products to the latest patched versions to mitigate the risk of potential Denial-of-Service attacks.
Long-Term Security Practices
Implement robust network security measures and regular vulnerability assessments to ensure the overall security of the systems.
Patching and Updates
Regularly check for security updates from Siemens and apply patches promptly to address known vulnerabilities and enhance product security.