CVE-2021-43160 : What You Need to Know

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 switchFastDhcp function in /cgi-bin/luci/api/diagnose.

Understanding CVE-2021-43160

This CVE involves a critical RCE vulnerability in certain Ruijie Networks Routers.

What is CVE-2021-43160?

The vulnerability allows for remote attackers to execute arbitrary code through the switchFastDhcp function.

The Impact of CVE-2021-43160

The vulnerability can be exploited for unauthorized remote code execution on affected routers, potentially leading to a complete system compromise.

Technical Details of CVE-2021-43160

Details of the technical aspects and impact of the CVE.

Vulnerability Description

The vulnerability exists in the switchFastDhcp function in Ruijie RG-EW Series Routers, allowing attackers to execute malicious code remotely.

Affected Systems and Versions

Affected systems: Ruijie Networks Ruijie RG-EW Series Routers
Vulnerable versions: Up to ReyeeOS 1.55.1915 / EW_3.0(1)B11P55

Exploitation Mechanism

Attackers can exploit this vulnerability via the switchFastDhcp function in the router's diagnostic interface.

Mitigation and Prevention

Protective measures and actions to address the CVE.

Immediate Steps to Take

Disable remote access to the affected routers if not required
Implement network segmentation to limit exposure

Long-Term Security Practices

Regularly update router firmware and apply security patches
Conduct network vulnerability scans and penetration testing

Patching and Updates

Monitor vendor updates for security patches and apply them promptly to mitigate the vulnerability.