CVE-2021-43116 Explained : Impact and Mitigation

An Access Control vulnerability exists in Nacos 2.0.3 in the access prompt page, allowing a malicious user to login.

Understanding CVE-2021-43116

This CVE encompasses an access control vulnerability in Nacos 2.0.3, potentially enabling unauthorized access.

What is CVE-2021-43116?

CVE-2021-43116 is a security flaw in Nacos 2.0.3's access prompt page, where manipulation of captured packets allows malicious users to gain unauthorized entry.

The Impact of CVE-2021-43116

Malicious users can exploit this vulnerability to bypass access controls and gain unauthorized login access.

Technical Details of CVE-2021-43116

This section dives into specific technical aspects of the CVE.

Vulnerability Description

The vulnerability in Nacos 2.0.3 enables attackers to intercept packets, modify them, and gain unauthorized login access.

Affected Systems and Versions

Vendor: Nacos
Product: Nacos 2.0.3
Versions: All versions are affected

Exploitation Mechanism

Users input username and password on the access prompt page.
Clicking 'login' triggers packet capture.
Manipulation of the captured packet allows unauthorized access.

Mitigation and Prevention

Protect your system from CVE-2021-43116 using the following strategies.

Immediate Steps to Take

Disable access prompt pages until a patch is released.
Monitor access logs for unusual login patterns.
Implement network segmentation to limit unauthorized access.

Long-Term Security Practices

Conduct regular security audits and penetration testing.
Educate users on secure login practices and potential phishing attempts.

Patching and Updates

Apply patches and updates released by Nacos promptly to address this vulnerability.