CVE-2021-3149 : Exploit Details and Defense Strategies

Netshield NANO 25 10.2.18 devices are vulnerable to OS command injection in /usr/local/webmin/System/manual_ping.cgi. This CVE allows attackers to execute malicious commands on the affected system post-authentication.

Understanding CVE-2021-3149

This section delves into the details of CVE-2021-3149, shedding light on the vulnerability's nature and its impact.

What is CVE-2021-3149?

The vulnerability in Netshield NANO 25 10.2.18 devices enables threat actors to perform OS command injections using the manual_ping.cgi script after authenticating within the system.

The Impact of CVE-2021-3149

The exploitation of this vulnerability can lead to unauthorized remote code execution, potentially compromising the confidentiality, integrity, and availability of the affected devices.

Technical Details of CVE-2021-3149

Explore the technical aspects of the CVE, including the description of the vulnerability, affected systems, and the exploitation mechanism.

Vulnerability Description

The flaw arises from unsafe usage of system C library functions in /usr/local/webmin/System/manual_ping.cgi, allowing attackers to inject and execute arbitrary commands on the device.

Affected Systems and Versions

Netshield NANO 25 devices running version 10.2.18 are confirmed to be impacted by this vulnerability, potentially exposing them to exploitation.

Exploitation Mechanism

Attackers can leverage the exposed vulnerability post-authentication to inject malicious OS commands via the manual_ping.cgi script, gaining unauthorized control over the device.

Mitigation and Prevention

Discover the measures to mitigate the risks associated with CVE-2021-3149 and prevent similar security incidents in the future.

Immediate Steps to Take

It is crucial to apply security patches or updates provided by Netshield to address this vulnerability promptly and protect the affected devices from exploitation.

Long-Term Security Practices

Implementing robust access controls, network segmentation, and regular security audits can enhance the overall security posture and mitigate the risks of potential cyber threats.

Patching and Updates

Regularly monitor for security advisories from Netshield and promptly apply patches and updates to ensure that the devices remain protected against known vulnerabilities.