CVE-2021-27925 : What You Need to Know

An issue was discovered in Couchbase Server 6.5.x and 6.6.x through 6.6.1 where a race condition with the View Engine and Auditing enabled could lead to a cleartext leak of the internal user @ns_server's credentials in the ns_server.info.log file.

Understanding CVE-2021-27925

This CVE identifies a security vulnerability in Couchbase Server versions 6.5.x and 6.6.x through 6.6.1 that could potentially expose sensitive credentials.

What is CVE-2021-27925?

This CVE pertains to a specific scenario in Couchbase Server where a crash condition caused by a race condition can result in the leakage of the internal user @ns_server's administrator credentials in cleartext in a log file.

The Impact of CVE-2021-27925

The impact of this vulnerability is significant as it could lead to the exposure of sensitive credentials, potentially putting the security and integrity of the system at risk.

Technical Details of CVE-2021-27925

This section delves deeper into the technical aspects of the CVE.

Vulnerability Description

The vulnerability occurs in Couchbase Server versions 6.5.x and 6.6.x through 6.6.1 when using the View Engine and having Auditing enabled, resulting in a crash condition that leaks @ns_server's credentials in cleartext in the ns_server.info.log file.

Affected Systems and Versions

Couchbase Server versions 6.5.x and 6.6.x through 6.6.1 are affected by this vulnerability.

Exploitation Mechanism

The vulnerability is exploited through a race condition in the View Engine with Auditing enabled, leading to the cleartext leakage of @ns_server's credentials.

Mitigation and Prevention

To address CVE-2021-27925, the following steps are recommended:

Immediate Steps to Take

Disable Auditing if it is not essential for operational needs.
Monitor the ns_server.info.log file for any suspicious activities.

Long-Term Security Practices

Regularly update to the latest version of Couchbase Server to apply security patches.
Implement strong access controls and regularly review privilege allocations.
Conduct regular security audits and penetration testing to identify vulnerabilities.

Patching and Updates

Ensure that you apply the latest patches provided by Couchbase to remediate the vulnerability.