CVE-2022-3744 : Exploit Details and Defense Strategies
Discover the impact and mitigation of CVE-2022-3744, a vulnerability in Lenovo notebook LCFC BIOS allowing local attackers to manipulate UEFI variables with elevated privileges. Learn about the fix.
A potential vulnerability was discovered in LCFC BIOS for some Lenovo consumer notebook models that could allow a local attacker with elevated privileges to unlock UEFI variables due to a hard-coded SMI handler credential.
Understanding CVE-2022-3744
This section provides insights into the impact, technical details, and mitigation strategies related to CVE-2022-3744.
What is CVE-2022-3744?
The vulnerability exists in the LCFC BIOS of certain Lenovo consumer notebook models, enabling a local attacker with elevated privileges to manipulate UEFI variables using a hard-coded SMI handler credential.
The Impact of CVE-2022-3744
With a CVSS v3.1 base score of 6.7 and a medium severity level, this vulnerability poses a high risk to system availability, confidentiality, and integrity. It requires high privileges and no user interaction for exploitation.
Technical Details of CVE-2022-3744
Explore the specifics of the vulnerability, affected systems, and the exploitation mechanism.
Vulnerability Description
The vulnerability stems from the hardcoded SMI handler credential in LCFC BIOS, enabling unauthorized access to UEFI variables on impacted Lenovo notebook models.
Affected Systems and Versions
Lenovo consumer notebook models with LCFC BIOS are affected. Ensure to check the vendor's security advisory for a list of impacted versions.
Exploitation Mechanism
Local attackers with elevated privileges can exploit this vulnerability to unlock UEFI variables, potentially leading to unauthorized system modifications.
Mitigation and Prevention
Learn about the immediate steps and long-term practices to safeguard systems and apply necessary patches.
Immediate Steps to Take
Update the system firmware to the recommended version specified in the Lenovo product security advisory LEN-103710 to mitigate the vulnerability.
Long-Term Security Practices
Regularly check for firmware updates and security advisories from Lenovo to address similar vulnerabilities and enhance overall system security.
Patching and Updates
Keep systems up to date with the latest firmware versions provided by Lenovo to ensure protection against known security flaws.