CVE-2021-3897 : Vulnerability Insights and Analysis
Learn about CVE-2021-3897, an authentication bypass vulnerability in Lenovo's FPC2 and SMM firmware allowing attackers to execute commands. Find mitigation steps and firmware upgrades.
Lenovo identified an authentication bypass vulnerability in the Fan Power Controller2 (FPC2) and System Management Module (SMM) firmware, enabling unauthorized attackers to execute commands on affected systems.
Understanding CVE-2021-3897
This CVE involves an authentication bypass vulnerability impacting certain Lenovo products, potentially leading to critical security risks.
What is CVE-2021-3897?
The CVE-2021-3897 vulnerability pertains to an authentication bypass flaw within the Lenovo Fan Power Controller2 (FPC2) and System Management Module (SMM) firmware. By exploiting this weakness, unauthenticated threat actors could execute commands on the affected devices.
The Impact of CVE-2021-3897
With a CVSS base score of 9.8 (Critical), this vulnerability poses a severe risk to confidentiality, integrity, and availability due to the potential for unauthorized command execution on impacted systems.
Technical Details of CVE-2021-3897
This section provides insights into the vulnerability's description, affected systems, and the exploitation mechanism.
Vulnerability Description
The vulnerability allows an unauthenticated attacker to bypass authentication in the Lenovo FPC2 and SMM firmware, enabling them to execute commands on the affected devices.
Affected Systems and Versions
The Fan Power Controller2 (FPC2) and Lenovo System Management Module (SMM) firmware versions are affected by this vulnerability.
Exploitation Mechanism
The vulnerability can be exploited by unauthorized individuals to execute commands on the compromised Lenovo devices.
Mitigation and Prevention
Discover the immediate steps and long-term security practices to mitigate the risks associated with CVE-2021-3897.
Immediate Steps to Take
Users should upgrade to the firmware version specified for their model in the Product Impact section provided by Lenovo.
Long-Term Security Practices
Implement robust security measures such as regular firmware updates, network segmentation, and access control to bolster system security.
Patching and Updates
Keep systems up to date with the latest firmware patches and security updates to address any known vulnerabilities.