CVE-2023-26801 Explained : Impact and Mitigation

This CVE-2023-26801 was published on March 26, 2023, and it pertains to LB-LINK BL-AC1900_2.0 v1.0.1, LB-LINK BL-WR9000 v2.4.9, LB-LINK BL-X26 v1.2.5, and LB-LINK BL-LTE300 v1.0.8 routers. These routers were found to have a command injection vulnerability via specific parameters.

Understanding CVE-2023-26801

This section will provide an overview of what CVE-2023-26801 entails, including its impact and technical details.

What is CVE-2023-26801?

CVE-2023-26801 refers to a command injection vulnerability present in LB-LINK routers. This vulnerability allows threat actors to execute arbitrary commands through specific parameters, posing a significant risk to the security of the affected devices.

The Impact of CVE-2023-26801

The impact of this vulnerability is severe as it enables malicious actors to take unauthorized control over the affected routers. They could potentially disrupt network operations, steal sensitive information, or launch further attacks within the network.

Technical Details of CVE-2023-26801

In this section, we delve into the technical aspects of the vulnerability, including its description, affected systems, and the exploitation mechanism.

Vulnerability Description

The vulnerability in LB-LINK routers stems from improper input validation of the 'mac', 'time1', and 'time2' parameters in the '/goform/set_LimitClient_cfg' endpoint. This oversight allows attackers to inject and execute malicious commands within the router's environment.

Affected Systems and Versions

The affected LB-LINK router models include BL-AC1900_2.0 v1.0.1, BL-WR9000 v2.4.9, BL-X26 v1.2.5, and BL-LTE300 v1.0.8. Users utilizing these specific versions are at risk of exploitation unless mitigation measures are implemented promptly.

Exploitation Mechanism

To exploit CVE-2023-26801, threat actors can craft malicious input containing arbitrary commands and inject them through the vulnerable parameters. Once successful, they can remotely execute these commands, compromising the integrity and security of the affected routers.

Mitigation and Prevention

This section outlines the steps that users and administrators can take to mitigate the risks associated with CVE-2023-26801 and prevent potential exploitation.

Immediate Steps to Take

Users are advised to immediately update their LB-LINK routers to the latest firmware or apply patches released by the vendor to address the command injection vulnerability. Additionally, network segmentation and access controls can help restrict unauthorized access to the vulnerable routers.

Long-Term Security Practices

In the long term, it is crucial for organizations to implement robust security practices, such as regular security assessments, network monitoring, and employee training on cybersecurity best practices. These measures can enhance overall security posture and help mitigate the impact of future vulnerabilities.

Patching and Updates

Regularly checking for firmware updates and security advisories from LB-LINK is essential. Promptly applying patches and updates to address known vulnerabilities can help safeguard the routers from exploitation and enhance their resilience against evolving cyber threats.