CVE-2021-43161 Explained : Impact and Mitigation

A Remote Code Execution (RCE) vulnerability exists in Ruijie Networks Ruijie RG-EW Series Routers up to ReyeeOS 1.55.1915 / EW_3.0(1)B11P55 via the doSwitchApi function in /cgi-bin/luci/api/switch.

Understanding CVE-2021-43161

This CVE-2021-43161 vulnerability involves a Remote Code Execution issue in Ruijie Networks Ruijie RG-EW Series Routers.

What is CVE-2021-43161?

It is an RCE vulnerability present in Ruijie RG-EW Series Routers through the doSwitchApi function in /cgi-bin/luci/api/switch.

The Impact of CVE-2021-43161

Allows attackers to remotely execute malicious code on affected devices
Can lead to unauthorized access, data theft, and further exploitation of the compromised systems

Technical Details of CVE-2021-43161

This section delves into the specifics of the vulnerability.

Vulnerability Description

The vulnerability stems from improper input validation in the doSwitchApi function, enabling attackers to execute arbitrary code remotely.

Affected Systems and Versions

Ruijie Networks Ruijie RG-EW Series Routers up to ReyeeOS 1.55.1915 / EW_3.0(1)B11P55
Specific product versions susceptible to exploitation

Exploitation Mechanism

Attackers exploit the vulnerable doSwitchApi function in /cgi-bin/luci/api/switch to run malicious commands remotely.

Mitigation and Prevention

Taking steps to mitigate the risks associated with CVE-2021-43161 is crucial.

Immediate Steps to Take

Apply vendor-provided patches promptly
Implement network segmentation to limit the impact of potential exploits
Monitor network traffic for any suspicious activities

Long-Term Security Practices

Regularly update and patch all network devices
Conduct security audits and penetration testing to identify vulnerabilities
Educate users and administrators about safe computing practices

Patching and Updates

Ensure timely installation of security patches and firmware updates to address and prevent vulnerabilities like CVE-2021-43161.