CVE-2021-37204 : Exploit Details and Defense Strategies
Discover the details of CVE-2021-37204 affecting Siemens SIMATIC products, allowing attackers to trigger a denial-of-service condition on PLCs, requiring device restart for normal operations.
A vulnerability has been identified in SIMATIC Drive Controller family, SIMATIC ET 200SP Open Controller, SIMATIC S7-1200 CPU family, SIMATIC S7-1500 CPU family, SIMATIC S7-1500 Software Controller, SIMATIC S7-PLCSIM Advanced, SIPLUS TIM 1531 IRC, and TIM 1531 IRC by Siemens. An unauthenticated attacker could cause a denial-of-service condition in a PLC by sending a specially prepared packet over port 102/tcp, requiring a restart of the affected device to restore normal operations.
Understanding CVE-2021-37204
This section provides an insight into the CVE-2021-37204 vulnerability and its implications.
What is CVE-2021-37204?
CVE-2021-37204 is a vulnerability affecting various Siemens products, allowing an unauthenticated attacker to trigger a denial-of-service condition on a PLC.
The Impact of CVE-2021-37204
The impact of this vulnerability is significant as it can disrupt normal operations by causing a denial-of-service condition, necessitating a restart of the affected device.
Technical Details of CVE-2021-37204
Explore the specific technical details related to CVE-2021-37204 for a comprehensive understanding.
Vulnerability Description
The vulnerability allows an unauthenticated attacker to trigger a denial-of-service condition in a PLC by sending a specially crafted packet over port 102/tcp.
Affected Systems and Versions
Impacted products include SIMATIC Drive Controller family, SIMATIC ET 200SP Open Controller, SIMATIC S7-1200 and S7-1500 CPU families, SIMATIC S7-1500 Software Controller, SIMATIC S7-PLCSIM Advanced, SIPLUS TIM 1531 IRC, and TIM 1531 IRC.
Exploitation Mechanism
The vulnerability can be exploited by sending a malicious packet over port 102/tcp to the targeted device, causing a denial-of-service condition.
Mitigation and Prevention
Learn about the necessary steps to mitigate and prevent the CVE-2021-37204 vulnerability.
Immediate Steps to Take
Immediate actions include applying recommended patches and implementing network segmentation to mitigate the risk of exploitation.
Long-Term Security Practices
Implementing proactive security measures, conducting regular security assessments, and educating staff on cybersecurity best practices are essential for long-term security.
Patching and Updates
Regularly update the firmware and software of affected Siemens products to ensure protection against known vulnerabilities.