CVE-2019-2393 : Security Advisory and Response
Learn about CVE-2019-2393, a MongoDB Server vulnerability allowing denial of service attacks. Find out affected versions, impact, and mitigation steps.
A user with the authorization to execute database queries can potentially cause a denial of service by exploiting the $lookup and collations features in MongoDB Server versions prior to 4.2.1 for v4.2, prior to 4.0.13 for v4.0, and prior to 3.6.15 for v3.6.
Understanding CVE-2019-2393
This CVE involves a vulnerability in MongoDB Server that allows a user to execute specially crafted queries leading to a denial of service.
What is CVE-2019-2393?
CVE-2019-2393 is a vulnerability in MongoDB Server versions prior to 4.2.1, 4.0.13, and 3.6.15 that can be exploited by a user with query execution authorization.
The Impact of CVE-2019-2393
- CVSS Base Score: 6.5 (Medium Severity)
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: Low
- Availability Impact: High
- Scope: Unchanged
- Vulnerability Type: CWE-416 Use After Free
Technical Details of CVE-2019-2393
This section provides detailed technical information about the vulnerability.
Vulnerability Description
A user with query execution authorization can trigger a denial of service by executing specially crafted queries that exploit the $lookup and collations features in MongoDB Server.
Affected Systems and Versions
The vulnerability impacts the following versions of MongoDB Server:
- MongoDB Server v3.6 versions prior to 3.6.15
- MongoDB Server v4.0 versions prior to 4.0.13
- MongoDB Server v4.2 versions prior to 4.2.1
Exploitation Mechanism
The vulnerability is exploited by executing specifically constructed queries that utilize the $lookup and collations features.
Mitigation and Prevention
Protecting systems from CVE-2019-2393 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Update MongoDB Server to versions 3.6.15, 4.0.13, or 4.2.1 to mitigate the vulnerability.
- Monitor and restrict user permissions to minimize the risk of exploitation.
Long-Term Security Practices
- Regularly review and update database security configurations.
- Educate users on secure query practices to prevent exploitation.
Patching and Updates
- Apply security patches provided by MongoDB Inc. promptly to address known vulnerabilities.