CVE-2023-45079 : Exploit Details and Defense Strategies
Learn about CVE-2023-45079, a memory leakage vulnerability in Lenovo BIOS systems allowing local attackers to write to NVRAM variables. Follow Lenovo's advisory for system firmware updates.
A memory leakage vulnerability was reported in the NvmramSmm SMM driver that may allow a local attacker with elevated privileges to write to NVRAM variables.
Understanding CVE-2023-45079
This CVE-2023-45079 affects Lenovo BIOS systems, with the vulnerability reported by Souhardya Sardar of Cyberstanc.
What is CVE-2023-45079?
CVE-2023-45079 is a memory leakage vulnerability in the NvmramSmm SMM driver that enables a local attacker with elevated privileges to write to NVRAM variables.
The Impact of CVE-2023-45079
The vulnerability has a CVSS base score of 6.7, with high impact on availability, confidentiality, and integrity. Attack complexity is low, and privileges required are high.
Technical Details of CVE-2023-45079
Vulnerability Description
The vulnerability allows a local attacker to write to NVRAM variables by exploiting the memory leakage in the NvmramSmm SMM driver.
Affected Systems and Versions
Lenovo BIOS systems are affected, with various versions being vulnerable to this memory leakage issue.
Exploitation Mechanism
The attacker needs local access and elevated privileges to exploit this vulnerability, enabling them to manipulate NVRAM variables.
Mitigation and Prevention
Immediate Steps to Take
Users should update their system firmware to the recommended version or newer provided by Lenovo in the advisory.
Long-Term Security Practices
Regularly check for firmware updates and security advisories from Lenovo to stay protected against vulnerabilities.
Patching and Updates
Update system firmware to the version indicated for your model in the security advisory released by Lenovo.