Full Report
MongoDB security advisory (AV26-911)
Analysis Summary
# Vulnerability: Multiple Flaws in MongoDB Java and PHP Drivers
## CVE Details
- **CVE ID**: Not explicitly listed in the advisory (Referenced by internal Jira IDs: JAVA-6276 and PHPLARA-260).
- **CVSS Score**: Not provided (Estimate: High/Critical for Use-After-Free; Medium for Query Injection).
- **CWE**:
- CWE-416 (Use After Free) - Java Driver
- CWE-20 (Improper Input Validation) / Query Injection - PHP Laravel Driver
## Affected Systems
- **Products**:
- MongoDB Java Driver
- Laravel MongoDB (PHP Driver)
- **Versions**:
- Java Driver: Versions prior to 5.11.1
- Laravel MongoDB: Versions prior to 5.11.0
- **Configurations**:
- **Java**: Specifically affects systems using **reactive encryption** where KMS (Key Management Service) credential fetching is cancelled via racing conditions.
- **Laravel/PHP**: Affects systems using the **Query Builder** where a 3-argument `where` clause uses the `=` operator with an array value.
## Vulnerability Description
1. **Java Driver (JAVA-6276)**: A **Use-After-Free** vulnerability exists in the native heap management. This occurs due to a race condition during the cancellation of a KMS credential fetch process within the reactive encryption module. This could lead to memory corruption or arbitrary code execution.
2. **Laravel MongoDB (PHPLARA-260)**: A logic flaw in the Query Builder fails to force literal equality when an array is passed to a 3-argument `where` clause using the `=` operator. This could potentially allow for **NoSQL injection** or unexpected query behavior if user input is not properly sanitized before being passed to the driver.
## Exploitation
- **Status**: Not reported as exploited in the wild; PoC status undisclosed in the brief.
- **Complexity**:
- **Java**: High (Requires specific race condition timing).
- **PHP**: Low/Medium (Depends on application-level input handling).
- **Attack Vector**: Network (Remote).
## Impact
- **Confidentiality**: High (Potential unauthorized data access).
- **Integrity**: High (Potential data modification or heap corruption).
- **Availability**: High (Potential for system crashes/DoS via Use-After-Free).
## Remediation
### Patches
- **Java Driver**: Upgrade to version **5.11.1** or later.
- **Laravel MongoDB**: Upgrade to version **5.11.0** or later.
### Workarounds
- **Java**: Disable reactive encryption or ensure KMS credential fetching is not subject to abrupt cancellations if possible.
- **PHP**: Explicitly sanitize array values before passing them to the Query Builder's `where` clause.
## Detection
- **Indicators of Compromise**: Monitor for unexpected application crashes (Java) or unusual NoSQL query patterns/errors in application logs (PHP).
- **Detection methods and tools**: Standard static analysis (SAST) tools can identify vulnerable driver versions in dependency files (e.g., `pom.xml`, `composer.json`).
## References
- MongoDB Jira (PHP): hxxps[://]jira[.]mongodb[.]org/browse/PHPLARA-260
- MongoDB Jira (Java): hxxps[://]jira[.]mongodb[.]org/browse/JAVA-6276
- Cyber Centre Advisory: hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/mongodb-security-advisory-av26-911