CVE-2024-5936
📋 TL;DR
An open redirect vulnerability in imartinez/privategpt version 0.5.0 allows attackers to redirect users to malicious websites by manipulating the 'file' parameter. This can lead to phishing attacks, malware distribution, and credential theft. Users of PrivateGPT 0.5.0 are affected.
💻 Affected Systems
- imartinez/privategpt
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Users are redirected to sophisticated phishing sites that steal credentials or install malware, leading to full account compromise or system infection.
Likely Case
Attackers use the redirect for phishing campaigns to harvest user credentials or distribute low-level malware.
If Mitigated
With proper input validation, users are protected from malicious redirects, maintaining normal application functionality.
🎯 Exploit Status
Exploitation requires user interaction (clicking a link) but is technically simple.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.5.1 or later
Vendor Advisory: https://github.com/imartinez/privategpt/security/advisories
Restart Required: Yes
Instructions:
1. Update PrivateGPT to version 0.5.1 or later. 2. Restart the application. 3. Verify the fix by testing redirect functionality.
🔧 Temporary Workarounds
Input Validation Filter
allImplement server-side validation to restrict 'file' parameter to allowed URLs or domains.
Modify source code to validate and sanitize the 'file' parameter input.
🧯 If You Can't Patch
- Implement a web application firewall (WAF) rule to block malicious redirect patterns.
- Educate users to avoid clicking on untrusted links from the application.
🔍 How to Verify
Check if Vulnerable:
Test by accessing the application with a crafted 'file' parameter containing a malicious URL and check if redirect occurs.Check Version:
Check the application version in the UI or run 'privategpt --version' if available.Verify Fix Applied:
After patching, repeat the test; the application should not redirect to external malicious URLs.📡 Detection & Monitoring
Log Indicators:
- Unusual redirect patterns in access logs, especially with external URLs in 'file' parameter.
Network Indicators:
- Outbound HTTP requests to unexpected domains following application access.
SIEM Query:
source="privategpt_logs" AND url="*file=*" AND (url="*http://*" OR url="*https://*")