CVE-2021-22749 : Exploit Details and Defense Strategies
Get insights into CVE-2021-22749 affecting Modicon X80 BMXNOR0200H RTU SV1.70 IR22 and prior versions. Learn about the impact, technical details, and mitigation strategies for this CWE-200 vulnerability.
A CWE-200 vulnerability has been identified in Modicon X80 BMXNOR0200H RTU SV1.70 IR22 and prior versions. This vulnerability could lead to the exposure of sensitive information to unauthorized actors through a specially crafted HTTP request.
Understanding CVE-2021-22749
This section will cover what CVE-2021-22749 is, the impact it carries, its technical details, and mitigation strategies.
What is CVE-2021-22749?
The vulnerability in Modicon X80 BMXNOR0200H RTU SV1.70 IR22 and earlier versions allows unauthorized access to sensitive information related to the RTU configuration, including communication parameters dedicated to telemetry.
The Impact of CVE-2021-22749
The impact of this vulnerability is the potential leakage of critical information to malicious actors, compromising the confidentiality and integrity of the RTU configuration data.
Technical Details of CVE-2021-22749
Here, we dive into the specifics of the vulnerability, affected systems and versions, as well as the exploitation mechanism.
Vulnerability Description
The flaw enables an attacker to extract sensitive information about the RTU configuration by manipulating HTTP requests sent to the module's web server.
Affected Systems and Versions
The affected product is Modicon X80 BMXNOR0200H RTU SV1.70 IR22 and earlier versions.
Exploitation Mechanism
By sending a maliciously crafted HTTP request to the web server of the module, threat actors can exploit this vulnerability to access confidential configuration details.
Mitigation and Prevention
In this section, we discuss immediate steps to take, long-term security practices, and the importance of timely patching and updates.
Immediate Steps to Take
It is recommended to restrict network access to the affected device and monitor incoming HTTP requests for any suspicious activity.
Long-Term Security Practices
Implementing network segmentation, keeping systems updated, and conducting regular security audits can enhance overall cybersecurity posture.
Patching and Updates
Schneider Electric may release patches or updates to address this vulnerability. Ensure that you apply these fixes promptly to mitigate the risk of exploitation.