CVE-2021-27924 : Exploit Details and Defense Strategies

An issue was discovered in Couchbase Server 6.x through 6.6.1 where the Couchbase Server UI insecurely logs session cookies in the logs, allowing impersonation of a user if obtained by an attacker.

Understanding CVE-2021-27924

This section provides an overview of the vulnerability, its impact, technical details, and mitigation strategies.

What is CVE-2021-27924?

CVE-2021-27924 relates to an insecure logging issue in Couchbase Server 6.x through 6.6.1 that exposes user session cookies in the logs, facilitating user impersonation.

The Impact of CVE-2021-27924

This vulnerability could be exploited by attackers to access sensitive user sessions, leading to unauthorized access and potential data breaches.

Technical Details of CVE-2021-27924

This section delves into the specifics of the vulnerability, affected systems, and the exploitation mechanism.

Vulnerability Description

The vulnerability allows session cookies to be insecurely logged in Couchbase Server UI logs, enabling attackers to impersonate users.

Affected Systems and Versions

Couchbase Server versions 6.x through 6.6.1 are impacted by this vulnerability.

Exploitation Mechanism

Attackers can exploit this issue by obtaining the log files containing session cookies and using them for unauthorized access.

Mitigation and Prevention

Here, we discuss immediate steps to enhance security and long-term practices to safeguard against such vulnerabilities.

Immediate Steps to Take

Organizations should review log configurations, restrict log access, and monitor for unauthorized log access.

Long-Term Security Practices

Implement proper log sanitization, regularly review logging mechanisms, and educate users on secure practices to mitigate risks.

Patching and Updates

Ensure timely installation of security patches and updates provided by Couchbase to address the logging vulnerability.