CVE-2025-12119
📋 TL;DR
This vulnerability in MongoDB C driver allows reading invalid memory when large options are passed to mongoc_bulk_operation_t functions. This affects applications using MongoDB C driver, PHP driver, or related bindings. The issue could lead to crashes or information disclosure.
💻 Affected Systems
- MongoDB C Driver
- MongoDB PHP Driver
- Applications using these drivers
📦 What is this software?
C Driver by Mongodb
C Driver by Mongodb
Php Driver by Mongodb
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise if combined with other vulnerabilities, or sensitive memory disclosure.
Likely Case
Application crashes leading to denial of service, or limited memory disclosure.
If Mitigated
No impact if proper input validation and size limits are enforced.
🎯 Exploit Status
Exploitation requires ability to pass large options to bulk operations, typically requiring application-level access.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: C Driver: 1.30.6 or 2.1.2; PHP Driver: 1.21.2
Vendor Advisory: https://github.com/mongodb/mongo-c-driver/releases/tag/1.30.6
Restart Required: Yes
Instructions:
1. Identify affected MongoDB driver versions. 2. Update to patched versions: mongo-c-driver >=1.30.6 or >=2.1.2, mongo-php-driver >=1.21.2. 3. Restart applications using the drivers.
🔧 Temporary Workarounds
Input validation for bulk operation options
allImplement application-level validation to limit size of options passed to mongoc_bulk_operation_t functions.
🧯 If You Can't Patch
- Implement strict input validation to reject large options in bulk operations.
- Isolate affected systems from untrusted networks and monitor for crashes.
🔍 How to Verify
Check if Vulnerable:
Check installed driver versions: libmongoc version for C driver, php -m | grep mongodb for PHP driver.Check Version:
C Driver: pkg-config --modversion libmongoc-1.0; PHP: php -i | grep mongodbVerify Fix Applied:
Verify updated versions: libmongoc >=1.30.6 or >=2.1.2, PHP mongodb extension >=1.21.2.📡 Detection & Monitoring
Log Indicators:
- Application crashes related to MongoDB bulk operations
- Memory access violation errors in logs
Network Indicators:
- Unusual MongoDB query patterns with large payloads
SIEM Query:
source="application_logs" AND ("segmentation fault" OR "memory violation" OR "mongoc_bulk")