CVE-2019-19957 : Vulnerability Insights and Analysis

In the libIEC61850 1.4.0 version, an out-of-bounds read vulnerability exists in the "getNumberOfElements" function, located in the "mms_access_result.c" file in the "mms/iso_mms/server" directory. This vulnerability is associated with the variables "bufPos" and "elementLength".

Understanding CVE-2019-19957

This CVE involves an out-of-bounds read vulnerability in a specific function within the libIEC61850 1.4.0 version.

What is CVE-2019-19957?

The vulnerability in the "getNumberOfElements" function in the libIEC61850 1.4.0 version allows for an out-of-bounds read, posing a security risk.

The Impact of CVE-2019-19957

The vulnerability could potentially be exploited by attackers to read sensitive information or cause a denial of service by crashing the application.

Technical Details of CVE-2019-19957

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability is specifically related to an out-of-bounds read in the "getNumberOfElements" function in the mentioned file and directory.

Affected Systems and Versions

Affected Version: libIEC61850 1.4.0
Systems: Any system using the vulnerable version of libIEC61850

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating the variables "bufPos" and "elementLength" to read beyond the allocated memory space.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent the exploitation of this vulnerability.

Immediate Steps to Take

Update to a patched version of libIEC61850 that addresses the out-of-bounds read vulnerability.
Monitor network traffic for any suspicious activity that could indicate exploitation.

Long-Term Security Practices

Regularly update software and libraries to patch known vulnerabilities.
Implement secure coding practices to prevent buffer overflows and out-of-bounds read vulnerabilities.

Patching and Updates

Ensure that all systems using libIEC61850 are updated to a version that includes a fix for the out-of-bounds read vulnerability.