CVE-2019-19944 : Exploit Details and Defense Strategies
Learn about CVE-2019-19944, an out-of-bounds read vulnerability in libIEC61850 1.4.0 impacting intLen and bufPos variables. Find mitigation steps and affected systems here.
This CVE-2019-19944 article provides insights into an out-of-bounds read vulnerability in libIEC61850 1.4.0, specifically in the BerDecoder_decodeUint32 function.
Understanding CVE-2019-19944
What is CVE-2019-19944?
The vulnerability exists in the BerDecoder_decodeUint32 function within the mms/asn1/ber_decode.c file of libIEC61850 1.4.0, impacting the variables intLen and bufPos.
The Impact of CVE-2019-19944
The vulnerability could potentially lead to an out-of-bounds read, which may be exploited by attackers to access sensitive information or execute arbitrary code.
Technical Details of CVE-2019-19944
Vulnerability Description
The issue arises from an out-of-bounds read in the BerDecoder_decodeUint32 function within the mms/asn1/ber_decode.c file of libIEC61850 1.4.0, specifically related to intLen and bufPos variables.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Version: Not applicable
Exploitation Mechanism
The vulnerability can be exploited by malicious actors to read beyond the allocated memory space, potentially leading to information disclosure or code execution.
Mitigation and Prevention
Immediate Steps to Take
- Apply patches or updates provided by the software vendor.
- Monitor security advisories for any new information or patches related to this vulnerability.
Long-Term Security Practices
- Regularly update software and libraries to mitigate known vulnerabilities.
- Implement proper input validation and boundary checks in software development.
Patching and Updates
It is crucial to apply the latest patches or updates released by the libIEC61850 software maintainers to address this vulnerability.