CVE-2020-15158 : Security Advisory and Response
CVE-2020-15158 is a high severity vulnerability in libIEC61850 before version 1.4.3, allowing for a heap buffer overflow. Learn about the impact, affected systems, exploitation, and mitigation steps.
In libIEC61850 before version 1.4.3, a heap buffer overflow vulnerability exists due to an integer underflow when processing specific messages. This flaw can lead to application crashes or potentially remote code execution.
Understanding CVE-2020-15158
What is CVE-2020-15158?
CVE-2020-15158 is a vulnerability in libIEC61850 that allows for a heap buffer overflow, potentially leading to application crashes or remote code execution.
The Impact of CVE-2020-15158
The vulnerability has a CVSS base score of 7.7, indicating a high severity issue with a significant impact on availability.
Technical Details of CVE-2020-15158
Vulnerability Description
- An integer underflow in libIEC61850 before version 1.4.3 leads to a heap buffer overflow.
Affected Systems and Versions
- Product: libiec61850
- Vendor: mz-automation
- Versions Affected: < 1.4.3
Exploitation Mechanism
- Attack Complexity: High
- Attack Vector: Network
- Privileges Required: Low
- Scope: Changed
- User Interaction: None
- Confidentiality Impact: Low
- Integrity Impact: Low
- Availability Impact: High
Mitigation and Prevention
Immediate Steps to Take
- Apply the patch provided with commit 033ab5b.
- Upgrade to version 1.4.3 if using version 1.4.x.
- Implement changes from commit 033ab5b as a workaround for older versions.
Long-Term Security Practices
- Regularly update software to the latest versions.
- Monitor security advisories and apply patches promptly.
Patching and Updates
- Users of libIEC61850 should upgrade to version 1.4.3 to mitigate the vulnerability.