CVE-2025-63561
📋 TL;DR
This vulnerability allows attackers to perform a Slowloris-style Denial-of-Service attack against Summer Pearl Group Vacation Rental Management Platform by opening many slow HTTP connections, exhausting server resources and preventing legitimate access. It affects all users running versions prior to 1.0.2. The attack requires no authentication and can be performed remotely.
💻 Affected Systems
- Summer Pearl Group Vacation Rental Management Platform
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete service unavailability for extended periods, disrupting vacation rental operations, bookings, and management functions, potentially causing financial losses and customer dissatisfaction.
Likely Case
Intermittent service degradation or temporary outages affecting web interface and API availability, impacting user experience and operational efficiency.
If Mitigated
Minimal impact with proper rate limiting, connection timeouts, and DoS protection mechanisms in place.
🎯 Exploit Status
Slowloris attacks are well-documented and tools are readily available. The GitHub reference demonstrates exploitation techniques.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.0.2
Vendor Advisory: https://github.com/Stolichnayer/Summer-Pearl-Group-Slowloris-DoS
Restart Required: Yes
Instructions:
1. Download version 1.0.2 or later from official sources. 2. Backup current installation and data. 3. Stop the service. 4. Replace with patched version. 5. Restart the service. 6. Verify functionality.
🔧 Temporary Workarounds
Implement Web Application Firewall (WAF) Rules
allConfigure WAF to detect and block Slowloris attack patterns by setting connection rate limits and timeout thresholds.
Configure Reverse Proxy Timeouts
linuxSet aggressive connection and request timeouts on reverse proxies (nginx, Apache, HAProxy) to drop slow connections.
nginx: client_body_timeout 10s; client_header_timeout 10s; keepalive_timeout 5s;
Apache: Timeout 10
HAProxy: timeout client 10s
🧯 If You Can't Patch
- Deploy the application behind a reverse proxy with connection limiting and timeout settings configured to mitigate Slowloris attacks.
- Implement network-level rate limiting and DoS protection using firewalls or dedicated security appliances.
🔍 How to Verify
Check if Vulnerable:
Check the application version in admin panel or configuration files. If version is below 1.0.2, the system is vulnerable.Check Version:
Check application configuration or admin interface for version information.Verify Fix Applied:
After patching, verify version shows 1.0.2 or higher. Test with legitimate HTTP connections to ensure service remains available.📡 Detection & Monitoring
Log Indicators:
- High number of incomplete HTTP connections
- Connection timeouts exceeding normal thresholds
- Worker process exhaustion warnings
Network Indicators:
- Multiple slow HTTP connections from single IP addresses
- Incomplete HTTP requests with long delays between packets
SIEM Query:
source="web_server_logs" | stats count by src_ip | where count > 100 | table src_ip count