CVE-2022-30937 : Vulnerability Insights and Analysis
Learn about CVE-2022-30937, a memory corruption vulnerability in Siemens' EN100 Ethernet modules such as DNP3 IP, IEC 104, and more. Find out the impact, affected versions, and mitigation steps.
A vulnerability has been identified in multiple variants of Siemens' EN100 Ethernet module, including DNP3 IP, IEC 104, IEC 61850, Modbus TCP, and PROFINET IO. The vulnerability could allow an attacker to crash the affected application by sending specially crafted HTTP packets.
Understanding CVE-2022-30937
This CVE involves a memory corruption vulnerability in Siemens' EN100 Ethernet modules, impacting various protocols.
What is CVE-2022-30937?
The vulnerability in Siemens' EN100 Ethernet modules could be exploited by an attacker to crash the affected application, resulting in a denial of service (DoS) condition.
The Impact of CVE-2022-30937
The vulnerability allows attackers to exploit memory corruption in the affected modules, leading to potential DoS attacks on critical infrastructure systems.
Technical Details of CVE-2022-30937
The vulnerability arises from a memory corruption issue when handling specific HTTP packets.
Vulnerability Description
The flaw exists in the modules' processing of HTTP packets to the /txtrace endpoint, enabling a potential crash of the application.
Affected Systems and Versions
All versions of the EN100 Ethernet modules DNP3 IP, IEC 104, Modbus TCP, and PROFINET IO are affected. The IEC 61850 variant is vulnerable to versions below V4.37.
Exploitation Mechanism
By sending specially crafted HTTP packets, an attacker can trigger the memory corruption vulnerability, causing a crash and a DoS scenario.
Mitigation and Prevention
To secure systems against CVE-2022-30937, immediate actions and long-term security measures are recommended.
Immediate Steps to Take
Organizations should consider implementing network-level protections, monitoring for suspicious activity, and applying vendor-recommended patches promptly.
Long-Term Security Practices
Regular security training, network segmentation, and access control policies can help mitigate risks associated with vulnerabilities in critical industrial systems.
Patching and Updates
It is crucial for organizations to stay informed about security updates from Siemens and apply patches as soon as they become available.