CVE-2023-2993 : Security Advisory and Response

This CVE record was published on June 26, 2023, by Lenovo. It addresses a vulnerability that allows a valid, authenticated user with limited privileges to execute specific commands on System Management Module (SMM) and Fan Power Controller (FPC) devices without the necessary privileges.

Understanding CVE-2023-2993

This section delves into the details of CVE-2023-2993, outlining the impact of the vulnerability and providing technical insights.

What is CVE-2023-2993?

CVE-2023-2993 allows authenticated users with limited privileges to exploit web management server API calls on SMM v1, SMM v2, and FPC devices to execute commands beyond their authorized level.

The Impact of CVE-2023-2993

The vulnerability poses a medium severity risk as it enables users with restricted permissions to carry out unauthorized actions on affected Lenovo devices, potentially leading to misuse or manipulation of system functionalities.

Technical Details of CVE-2023-2993

In this section, we will explore the specific technical aspects of the CVE-2023-2993 vulnerability.

Vulnerability Description

The vulnerability arises from the improper handling of web management server API calls on SMM v1, SMM v2, and FPC devices, allowing users with limited privileges to execute unauthorized commands.

Affected Systems and Versions

The vulnerability impacts various versions of System Management Module (SMM) and Fan Power Controller (FPC) devices manufactured by Lenovo.

Exploitation Mechanism

By crafting specific web management server API calls, authenticated users with limited privileges can circumvent access restrictions and execute commands beyond their authorized scope, posing a security risk to the affected devices.

Mitigation and Prevention

To safeguard against the CVE-2023-2993 vulnerability, immediate actions and long-term security measures can be implemented to mitigate potential risks and ensure system integrity.

Immediate Steps to Take

Users are advised to upgrade to the firmware version specified for their device model in the advisory provided by Lenovo to mitigate the vulnerability and prevent unauthorized command execution.

Long-Term Security Practices

Implementing least privilege access controls, regular security assessments, and monitoring web management server activities can enhance system security and prevent unauthorized access to critical functions.

Patching and Updates

Regularly applying firmware updates and security patches provided by Lenovo is essential to address known vulnerabilities like CVE-2023-2993 and strengthen the security posture of SMM and FPC devices.