CVE-2019-9039 : Exploit Details and Defense Strategies
Learn about CVE-2019-9039, a vulnerability in Couchbase Sync Gateway 2.1.2 allowing unauthorized access to execute N1QL statements, potentially leading to data extraction and denial of service attacks. Find out how to mitigate and prevent this security issue.
Couchbase Sync Gateway 2.1.2 allows unauthorized access to execute N1QL statements, potentially leading to data extraction and denial of service attacks.
Understanding CVE-2019-9039
Couchbase Sync Gateway 2.1.2 vulnerability allows attackers to execute additional N1QL statements through the public REST API.
What is CVE-2019-9039?
An unauthorized individual with access to the public REST API of Couchbase Sync Gateway 2.1.2 could execute additional N1QL statements, potentially retrieving sensitive information or executing arbitrary N1QL functions using specific parameters.
The Impact of CVE-2019-9039
- Attackers could cause a denial of service by executing nested queries with CPU-intensive operations, leading to increased resource consumption.
- The vulnerability could allow unauthorized access to sensitive data and arbitrary function execution.
Technical Details of CVE-2019-9039
Couchbase Sync Gateway 2.1.2 vulnerability details.
Vulnerability Description
The vulnerability in Couchbase Sync Gateway 2.1.2 allows unauthorized access to the public REST API to execute additional N1QL statements, potentially leading to data extraction and denial of service attacks.
Affected Systems and Versions
- Affected Version: 2.1.2
- Resolved Versions: 2.5.0 and 2.1.3
Exploitation Mechanism
Attackers exploit the vulnerability by issuing additional N1QL statements through specific parameters on the "_all_docs" endpoint, potentially causing denial of service conditions.
Mitigation and Prevention
Steps to mitigate and prevent the CVE-2019-9039 vulnerability.
Immediate Steps to Take
- Upgrade to versions 2.5.0 or 2.1.3 to address the vulnerability.
- Restrict access to the _all_docs endpoint to authorized users only.
Long-Term Security Practices
- Regularly monitor and audit API access for unauthorized activities.
- Implement least privilege access controls to limit potential attack surfaces.
- Educate users on secure API usage practices.
Patching and Updates
- Apply patches and updates provided by Couchbase to ensure the security of the Sync Gateway software.