CVE-2019-13177
📋 TL;DR
This vulnerability in django-rest-registration allows remote attackers to spoof user verification processes by exploiting a static signature string instead of secure dynamic signatures. It affects all applications using django-rest-registration for user registration/verification before version 0.5.0. Attackers can bypass email verification and potentially take over user accounts.
💻 Affected Systems
- django-rest-registration (Django REST Registration library)
📦 What is this software?
Django Rest Registration by Django Rest Registration Project
⚠️ Risk & Real-World Impact
Worst Case
Complete account takeover of any user, including administrators, leading to full system compromise and data exfiltration.
Likely Case
Unauthorized account creation and takeover of regular user accounts, enabling privilege escalation and data access.
If Mitigated
Limited impact with proper monitoring and additional authentication layers, but verification bypass remains possible.
🎯 Exploit Status
The vulnerability is in the verification mechanism itself, making exploitation straightforward once understood.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.5.0
Vendor Advisory: https://github.com/apragacz/django-rest-registration/security/advisories/GHSA-p3w6-jcg4-52xh
Restart Required: No
Instructions:
1. Update django-rest-registration to version 0.5.0 or later using pip: pip install django-rest-registration>=0.5.0
2. Verify the update with: pip show django-rest-registration
3. No Django server restart required for library updates, but restart if using cached modules.
🔧 Temporary Workarounds
Disable User Registration
allTemporarily disable user registration endpoints until patched
# In Django settings or URL configuration, remove/comment registration URLs
🧯 If You Can't Patch
- Implement additional verification layers (2FA, manual approval)
- Monitor registration logs for suspicious patterns and implement rate limiting
🔍 How to Verify
Check if Vulnerable:
Check installed version: pip show django-rest-registration | grep VersionCheck Version:
pip show django-rest-registration | grep VersionVerify Fix Applied:
Confirm version is 0.5.0 or higher: pip show django-rest-registration | grep Version📡 Detection & Monitoring
Log Indicators:
- Unusual verification patterns, multiple verification attempts from single IP, successful verifications without corresponding emails
Network Indicators:
- HTTP requests to verification endpoints with manipulated signatures
SIEM Query:
source="django" AND (url_path="/verify-registration/" OR url_path="/verify-email/") AND status=200🔗 References
- https://github.com/apragacz/django-rest-registration/releases/tag/0.5.0
- https://github.com/apragacz/django-rest-registration/security/advisories/GHSA-p3w6-jcg4-52xh
- https://github.com/apragacz/django-rest-registration/releases/tag/0.5.0
- https://github.com/apragacz/django-rest-registration/security/advisories/GHSA-p3w6-jcg4-52xh
