CVE-2019-6171 Explained : Impact and Mitigation
Learn about CVE-2019-6171, a vulnerability in Lenovo BIOS versions of older ThinkPad systems allowing unauthorized firmware updates. Find mitigation steps and long-term security practices here.
A security flaw in multiple BIOS versions of older ThinkPad systems allows unauthorized firmware updates to the Embedded Controller.
Understanding CVE-2019-6171
What is CVE-2019-6171?
A vulnerability in various BIOS versions of older ThinkPad systems enables users with administrative privileges or physical access to install unsigned firmware updates to the Embedded Controller.
The Impact of CVE-2019-6171
The vulnerability has a CVSS base score of 6.4, with high impacts on confidentiality, integrity, and availability. It requires no user interaction and has a high attack complexity.
Technical Details of CVE-2019-6171
Vulnerability Description
The flaw allows unauthorized firmware updates to the Embedded Controller in multiple BIOS versions of older ThinkPad systems.
Affected Systems and Versions
- Product: BIOS
- Vendor: Lenovo
- Versions: Various
Exploitation Mechanism
The vulnerability can be exploited by users with administrative privileges or physical access to the system.
Mitigation and Prevention
Immediate Steps to Take
- Update to the specified BIOS version or later as detailed in the Product Impact section of LEN-27764.
Long-Term Security Practices
- Regularly update BIOS and firmware to the latest versions.
- Implement strict access controls to prevent unauthorized physical access.
Patching and Updates
- Apply security patches and updates provided by Lenovo to address the vulnerability.