CVE-2025-55128
📋 TL;DR
An uncontrolled resource consumption vulnerability in userlog-index.php allows authenticated admin users to request arbitrarily large page sizes, potentially causing denial of service through excessive resource consumption. This affects systems running vulnerable versions of the software with admin interface access.
💻 Affected Systems
- Software containing userlog-index.php (specific product name not provided in CVE)
📦 What is this software?
Revive Adserver by Aquaplatform
⚠️ Risk & Real-World Impact
Worst Case
Complete system unavailability due to resource exhaustion (CPU, memory, or disk I/O) from repeated large requests, potentially affecting all users and services on the same host.
Likely Case
Performance degradation or temporary service interruption for the affected application, with recovery possible after attack stops or system restart.
If Mitigated
Minimal impact with proper rate limiting, input validation, and resource quotas in place.
🎯 Exploit Status
Exploitation requires admin credentials but is technically simple - just sending requests with large 'items per page' values.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown - check vendor advisory
Vendor Advisory: https://hackerone.com/reports/3413890
Restart Required: No
Instructions:
1. Review the HackerOne report for vendor response. 2. Check for official patches from the software vendor. 3. Apply patches following vendor instructions. 4. Test in non-production environment first.
🔧 Temporary Workarounds
Implement Input Validation
allAdd server-side validation to limit the maximum items per page parameter
Modify userlog-index.php to validate and limit the 'items_per_page' parameter to a reasonable maximum (e.g., 1000)
Rate Limiting
allImplement rate limiting on admin endpoints to prevent rapid repeated requests
Configure web server or application rate limiting for admin paths
🧯 If You Can't Patch
- Restrict admin interface access to trusted IP addresses only
- Implement web application firewall rules to block requests with excessive page size parameters
🔍 How to Verify
Check if Vulnerable:
Test by accessing userlog-index.php with admin credentials and attempting to request an extremely large number of items per page (e.g., 1000000). Monitor system resources during test.Check Version:
Check software version through admin interface or configuration files specific to the applicationVerify Fix Applied:
After applying fixes, repeat the test and verify that large page size requests are rejected or limited, and system resources remain stable.📡 Detection & Monitoring
Log Indicators:
- Unusually large 'items_per_page' values in access logs
- Repeated requests to userlog-index.php from same admin user
- Error logs showing resource exhaustion warnings
Network Indicators:
- High volume of requests to admin endpoints
- Unusual traffic patterns to userlog-index.php
SIEM Query:
source="web_logs" AND uri="*userlog-index.php*" AND (items_per_page>1000 OR parameter_value>1000)