CVE-2022-48189 : Exploit Details and Defense Strategies
Learn about CVE-2022-48189, a critical SMM driver input validation flaw in Lenovo ThinkPad BIOS. Find out the impact, affected systems, and mitigation steps.
A critical SMM driver input validation vulnerability in the BIOS of certain Lenovo ThinkPad models has been identified, potentially enabling a local attacker with elevated privileges to execute arbitrary code.
Understanding CVE-2022-48189
In this section, we will delve into the details of CVE-2022-48189.
What is CVE-2022-48189?
CVE-2022-48189 refers to an SMM driver input validation vulnerability present in the BIOS of select Lenovo ThinkPad models. The flaw allows an attacker with local access and escalated privileges to run arbitrary code.
The Impact of CVE-2022-48189
The vulnerability's impact includes high availability, confidentiality, and integrity impacts. The CVSS base score is 6.7, indicating a medium severity issue with the potential for severe consequences.
Technical Details of CVE-2022-48189
This section provides a deeper look into the technical aspects of CVE-2022-48189.
Vulnerability Description
The vulnerability arises from improper input validation in the SMM driver within the BIOS of certain Lenovo ThinkPad models, paving the way for arbitrary code execution by a local attacker with elevated privileges.
Affected Systems and Versions
The impacted systems include various versions of the ThinkPad BIOS from Lenovo.
Exploitation Mechanism
To exploit this vulnerability, an attacker needs local access to the targeted system and elevated privileges, enabling the execution of arbitrary code.
Mitigation and Prevention
Outlined below are the steps to mitigate and prevent exploitation of CVE-2022-48189.
Immediate Steps to Take
It is crucial to update the system firmware to the version specified for your model in the Product Impact section of Lenovo's security advisory LEN-106014.
Long-Term Security Practices
In the long run, regular security updates and patches must be applied to ensure system integrity and mitigate potential vulnerabilities.
Patching and Updates
Stay informed about security updates and patches released by Lenovo to address CVE-2022-48189 and other potential threats.