CVE-2019-6831 Explained : Impact and Mitigation
Learn about CVE-2019-6831 affecting Schneider Electric's BMXNOR0200H Ethernet/Serial RTU module. Discover the impact, technical details, and mitigation steps for this CWE-754 vulnerability.
The BMXNOR0200H Ethernet/Serial RTU module by Schneider Electric SE is affected by a CWE-754 vulnerability that can lead to disconnection of active connections under specific conditions.
Understanding CVE-2019-6831
This CVE involves a vulnerability in the BMXNOR0200H module that can result in the disconnection of active connections when a high number of IEC 60870-5-104 packets are received on port 2404/TCP.
What is CVE-2019-6831?
The CVE-2019-6831 vulnerability is classified as CWE-754, indicating an 'Improper Check for Unusual or Exceptional Conditions' within the affected Schneider Electric module.
The Impact of CVE-2019-6831
The vulnerability can be exploited to disrupt the module's functionality by causing it to disconnect active connections when an abnormal volume of specific packets is received.
Technical Details of CVE-2019-6831
The following technical details outline the specifics of the CVE-2019-6831 vulnerability.
Vulnerability Description
The BMXNOR0200H Ethernet/Serial RTU module is susceptible to disconnection of active connections upon receiving an unusually high number of IEC 60870-5-104 packets on port 2404/TCP due to the CWE-754 vulnerability.
Affected Systems and Versions
- Product: BMXNOR0200H Ethernet / Serial RTU module
- Vendor: Schneider Electric SE
- Versions: All firmware versions
Exploitation Mechanism
The vulnerability can be exploited by sending an abnormally high number of IEC 60870-5-104 packets to the module on port 2404/TCP, triggering the disconnection of active connections.
Mitigation and Prevention
To address CVE-2019-6831 and enhance system security, the following steps are recommended:
Immediate Steps to Take
- Monitor network traffic for unusual patterns that may indicate an attack exploiting this vulnerability.
- Implement network segmentation to limit the impact of potential attacks.
- Apply firewall rules to restrict access to vulnerable systems.
Long-Term Security Practices
- Regularly update firmware and software to patch known vulnerabilities.
- Conduct security assessments and penetration testing to identify and address potential weaknesses.
Patching and Updates
- Stay informed about security advisories from Schneider Electric SE and promptly apply recommended patches to mitigate the CVE-2019-6831 vulnerability.