CVE-2019-6136 Explained : Impact and Mitigation

A problem has been identified in libIEC61850 v1.3.1 where a SEGV error occurs in Ethernet_setProtocolFilter, located in hal/ethernet/linux/ethernet_linux.c. This issue has been demonstrated in sv_subscriber_example.c and sv_subscriber.c.

Understanding CVE-2019-6136

This CVE entry highlights a vulnerability in libIEC61850 v1.3.1 that can lead to a SEGV error in specific code segments.

What is CVE-2019-6136?

CVE-2019-6136 is a vulnerability in libIEC61850 v1.3.1 that triggers a SEGV error in Ethernet_setProtocolFilter within ethernet_linux.c.

The Impact of CVE-2019-6136

The vulnerability can potentially lead to crashes or denial of service if exploited by attackers.

Technical Details of CVE-2019-6136

This section delves into the technical aspects of the CVE.

Vulnerability Description

The issue arises in libIEC61850 v1.3.1 due to a SEGV error in Ethernet_setProtocolFilter in ethernet_linux.c, as demonstrated in sv_subscriber_example.c and sv_subscriber.c.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Version: Not applicable

Exploitation Mechanism

The vulnerability can be exploited by manipulating the Ethernet_setProtocolFilter function in the specified code files.

Mitigation and Prevention

Protecting systems from CVE-2019-6136 is crucial to maintain security.

Immediate Steps to Take

Monitor for security advisories related to libIEC61850 and apply patches promptly.
Restrict network access to vulnerable components.
Implement network segmentation to contain potential attacks.

Long-Term Security Practices

Regularly update and patch software to address known vulnerabilities.
Conduct security assessments and penetration testing to identify and mitigate weaknesses.

Patching and Updates

Stay informed about security updates from the libIEC61850 project.
Apply patches provided by the vendor to address the CVE-2019-6136 vulnerability.