CVE-2020-7610
📋 TL;DR
CVE-2020-7610 is a deserialization vulnerability in the bson npm package that allows attackers to manipulate BSON data types. When exploited, it can lead to arbitrary code execution by tricking the parser into treating malicious data as legitimate BSON objects. This affects any application using vulnerable versions of the bson package for MongoDB data handling.
💻 Affected Systems
- bson npm package
- MongoDB Node.js drivers
- Applications using bson for BSON serialization
📦 What is this software?
Bson by Mongodb
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, and lateral movement within the network.
Likely Case
Application crashes, data corruption, or denial of service through malformed BSON objects.
If Mitigated
Limited impact if proper input validation and sandboxing are implemented, though deserialization vulnerabilities remain dangerous.
🎯 Exploit Status
Exploitation requires sending specially crafted BSON data to vulnerable applications. Public proof-of-concept code exists demonstrating the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.1.4 and later
Vendor Advisory: https://www.npmjs.com/advisories/1594
Restart Required: Yes
Instructions:
1. Update bson package: npm update bson
2. Verify version is 1.1.4 or higher
3. Restart all affected applications
4. Test BSON serialization/deserialization functionality
🔧 Temporary Workarounds
Input Validation
allImplement strict input validation for all BSON data before deserialization
Package Lock
allPin bson version to 1.1.4 or higher in package.json
npm install bson@^1.1.4
🧯 If You Can't Patch
- Implement network segmentation to isolate vulnerable systems
- Deploy web application firewall (WAF) rules to block malformed BSON payloads
🔍 How to Verify
Check if Vulnerable:
Check package.json or run: npm list bson | grep bsonCheck Version:
npm list bsonVerify Fix Applied:
Verify installed version: npm list bson | grep bson@1.1.4📡 Detection & Monitoring
Log Indicators:
- Unexpected application crashes
- Deserialization errors in logs
- Unusual BSON parsing failures
Network Indicators:
- Malformed BSON payloads in network traffic
- Unexpected data sent to MongoDB endpoints
SIEM Query:
source="application.logs" AND ("bson" OR "deserialization") AND (error OR crash OR exception)