CVE-2020-8158
📋 TL;DR
CVE-2020-8158 is a prototype pollution vulnerability in TypeORM that allows attackers to modify JavaScript object prototypes, potentially leading to SQL injection or denial of service. This affects applications using TypeORM versions below 0.2.25 for database operations.
💻 Affected Systems
- TypeORM
📦 What is this software?
Typeorm by Typeorm
⚠️ Risk & Real-World Impact
Worst Case
Full application compromise via SQL injection leading to data theft, data manipulation, or complete system takeover.
Likely Case
Denial of service through application crashes or SQL injection leading to data exposure.
If Mitigated
Limited impact if input validation and proper sanitization are implemented.
🎯 Exploit Status
Exploitation requires understanding of prototype pollution and TypeORM's internal structure.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.2.25
Vendor Advisory: https://github.com/typeorm/typeorm/security/advisories/GHSA-4qrc-9jrw-vq9v
Restart Required: Yes
Instructions:
1. Update package.json to specify TypeORM >= 0.2.25
2. Run 'npm update typeorm' or 'yarn upgrade typeorm'
3. Restart your application
4. Test database operations thoroughly
🔧 Temporary Workarounds
Input Validation Sanitization
allImplement strict input validation and sanitization for all user-controlled data passed to TypeORM.
🧯 If You Can't Patch
- Implement WAF rules to block suspicious SQL patterns and prototype pollution attempts
- Isolate database access to minimal required permissions and implement network segmentation
🔍 How to Verify
Check if Vulnerable:
Check package.json or run 'npm list typeorm' to see installed versionCheck Version:
npm list typeorm | grep typeormVerify Fix Applied:
Verify installed version is >= 0.2.25 and test database operations📡 Detection & Monitoring
Log Indicators:
- Unusual SQL query patterns
- Application crashes related to database operations
- Error logs mentioning prototype pollution
Network Indicators:
- Unusual database connection patterns
- SQL injection attempts in HTTP requests
SIEM Query:
source="application.logs" AND ("prototype pollution" OR "TypeORM error" OR "SQL injection")