CVE-2021-30166 Explained : Impact and Mitigation

A command injection vulnerability (CWE-78) in the NTP server configuration function of MERIT LILIN ENT.CO.,LTD. P2/Z2/P3/Z3 IP camera firmware allows remote attackers to execute arbitrary commands with privileged permissions.

Understanding CVE-2021-30166

This CVE relates to a command injection flaw in the IP camera firmware that can be exploited remotely.

What is CVE-2021-30166?

The NTP Server configuration function of the IP camera device is not verified with special parameters, allowing remote attackers to execute arbitrary commands post-login.

The Impact of CVE-2021-30166

The vulnerability has a CVSS base score of 7.2 (High severity), with a high impact on confidentiality, integrity, and availability. Attack complexity is low and privileges are required for exploitation.

Technical Details of CVE-2021-30166

This section covers the vulnerability description, affected systems, and exploitation mechanism.

Vulnerability Description

The vulnerability arises due to the lack of parameter verification in the NTP server configuration function, enabling attackers to perform command injections.

Affected Systems and Versions

MERIT LILIN ENT.CO.,LTD. P2/Z2/P3/Z3 IP camera firmware versions up to 7.1.94.8908 are affected by this vulnerability.

Exploitation Mechanism

Remote attackers can exploit this vulnerability by injecting arbitrary commands after gaining privileged access.

Mitigation and Prevention

Here we provide immediate steps to take and long-term security practices to mitigate the risk.

Immediate Steps to Take

Update the P2/Z2/P3/Z3 IP camera firmware to SVN9695 to address the vulnerability.

Long-Term Security Practices

Regularly update firmware, restrict network access to the camera, and follow security best practices to prevent future incidents.

Patching and Updates

Keep abreast of security advisories from MERIT LILIN ENT.CO.,LTD. and apply patches promptly to secure the IP cameras.