CVE-2024-1240
📋 TL;DR
An open redirection vulnerability in pyload/pyload version 0.5.0 allows attackers to redirect users to malicious websites by manipulating the 'next' parameter during login. This affects all users of vulnerable pyload installations and can lead to phishing attacks or malware distribution. The vulnerability is fixed in pyload-ng 0.5.0b3.dev79.
💻 Affected Systems
- pyload
📦 What is this software?
Pyload by Pyload
⚠️ Risk & Real-World Impact
Worst Case
Users are redirected to sophisticated phishing sites that steal credentials or install malware, leading to account compromise or system infection.
Likely Case
Users are redirected to phishing pages attempting to steal login credentials or personal information.
If Mitigated
Users might see unexpected redirects but modern browsers may warn about suspicious URLs.
🎯 Exploit Status
Exploitation requires user interaction (clicking a crafted link) but is technically simple to implement.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: pyload-ng 0.5.0b3.dev79
Vendor Advisory: https://github.com/pyload/pyload/commit/fe94451dcc2be90b3889e2fd9d07b483c8a6dccd
Restart Required: Yes
Instructions:
1. Backup your pyload configuration and data. 2. Update to pyload-ng 0.5.0b3.dev79 or later. 3. Restart the pyload service. 4. Verify the fix by testing the login functionality.
🔧 Temporary Workarounds
Input Validation Workaround
allManually validate or sanitize the 'next' parameter in the login handler to only allow relative URLs or trusted domains.
# Modify the login handler code to validate the 'next' parameter
Web Application Firewall Rule
allConfigure WAF to block requests containing external URLs in the 'next' parameter.
# WAF-specific configuration to block patterns like 'next=http://external.com'
🧯 If You Can't Patch
- Restrict access to pyload web interface using network segmentation or VPN.
- Implement browser security policies or extensions that warn about open redirects.
🔍 How to Verify
Check if Vulnerable:
Check if your pyload version is 0.5.0 by examining the version in the web interface or configuration files.Check Version:
Check the pyload web interface or configuration file for version information.Verify Fix Applied:
After updating, test by attempting to redirect using a crafted 'next' parameter with an external URL; it should be blocked or sanitized.📡 Detection & Monitoring
Log Indicators:
- Log entries showing redirects to external domains from login requests
- Unusual 'next' parameter values in access logs
Network Indicators:
- HTTP 302 redirects to unexpected external domains from the login endpoint
SIEM Query:
source="pyload.log" AND (url="*next=*" AND url="*http*" AND NOT url="*localhost*" AND NOT url="*127.0.0.1*")