How the CVE Works
The vulnerability in Easy Appointments v1.5.1 arises from improper handling of user-supplied input, leading to resource exhaustion. Attackers exploit this flaw by sending crafted requests that trigger excessive processing or memory consumption, crashing the application. The lack of rate-limiting or input validation allows repeated malicious requests, degrading service availability. The issue stems from insufficient checks in appointment booking logic, where an attacker can overwhelm the system with invalid or oversized payloads.
DailyCVE Form
Platform: Easy Appointments
Version: 1.5.1
Vulnerability: DoS via resource exhaustion
Severity: Moderate
Date: May 7, 2025
What Undercode Say:
Exploitation:
1. Craft Malicious Payload:
curl -X POST http://target.com/api/book -d '{"repeat_booking": 1000}'
2. Flood Endpoints:
import requests
while True:
requests.post("http://target.com/api/check", data={"data": "A" 10000})
Protection:
1. Input Validation:
if (strlen($input) > 1000) { reject_request(); }
2. Rate Limiting (Apache):
<Location /api/> SetEnvIf Request_URI "^/api/book" DOS_URI LimitRequestBody 10240 </Location>
3. Patch Upgrade:
composer update easy-appointments
Detection:
- Log Analysis:
grep -E 'POST /api/book.HTTP/1.1" 500' access.log
- Monitoring:
netstat -an | grep ESTABLISHED | wc -l
Mitigation:
- Disable unused API endpoints.
- Implement WAF rules to block oversized payloads.
- Use cloud-based DDoS protection (e.g., Cloudflare).
No additional commentary beyond the specified rules.
Sources:
Reported By: github.com
Extra Source Hub:
Undercode
