CVE-2019-2392 : Vulnerability Insights and Analysis

A user who has been given the necessary permission to carry out database queries has the ability to cause a denial of service by creating specific queries that utilize the $mod operator to manipulate negative values to the point of overflow. This vulnerability affects MongoDB Server versions 3.6.20 and earlier, 4.0.20 and earlier, 4.2.9 and earlier, and 4.4.1 and earlier.

Understanding CVE-2019-2392

This CVE involves a vulnerability in MongoDB Server that allows a user with query permissions to trigger a denial of service attack through crafted queries.

What is CVE-2019-2392?

The CVE-2019-2392 vulnerability in MongoDB Server enables a user to exploit the $mod operator to overflow negative values, leading to a denial of service.

The Impact of CVE-2019-2392

CVSS Base Score: 6.5 (Medium Severity)
Attack Vector: Network
Attack Complexity: Low
Privileges Required: Low
Availability Impact: High
Integrity Impact: None
Confidentiality Impact: None
Scope: Unchanged
User Interaction: None
CVE ID: CVE-2019-2392
CWE ID: CWE-190 (Integer Overflow or Wraparound)

Technical Details of CVE-2019-2392

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability allows a user to exploit the $mod operator in MongoDB Server to manipulate negative values, leading to a denial of service.

Affected Systems and Versions

The following MongoDB Server versions are impacted:

MongoDB Server 3.6 versions before 3.6.20
MongoDB Server 4.0 versions before 4.0.20
MongoDB Server 4.2 versions before 4.2.9
MongoDB Server 4.4 versions before 4.4.1

Exploitation Mechanism

The exploitation involves crafting queries that utilize the $mod operator to overflow negative values, causing a denial of service.

Mitigation and Prevention

Protect your systems from CVE-2019-2392 with the following steps:

Immediate Steps to Take

Update MongoDB Server to the patched versions (3.6.20, 4.0.20, 4.2.9, 4.4.1) or later.
Monitor and restrict user permissions to prevent unauthorized queries.

Long-Term Security Practices

Regularly update MongoDB Server to the latest versions to address security vulnerabilities.
Implement secure coding practices to prevent exploitation of database operators.

Patching and Updates

Apply security patches provided by MongoDB Inc. promptly to mitigate the CVE-2019-2392 vulnerability.