CVE-2023-51316
📋 TL;DR
This vulnerability allows attackers to abuse the 'Forgot Password' feature in PHPJabbers Bus Reservation System v1.1 by sending excessive password reset emails to legitimate users. This can lead to denial of service through email flooding and potential email service disruption. Organizations using the vulnerable version of this bus reservation system are affected.
💻 Affected Systems
- PHPJabbers Bus Reservation System
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete email service disruption for the organization, overwhelming email servers with thousands of reset requests, and potential blacklisting of the organization's email domain by providers.
Likely Case
Temporary email service degradation, user complaints about spam password reset emails, and potential account lockouts due to excessive reset attempts.
If Mitigated
Minimal impact with proper rate limiting in place, where only legitimate password reset requests are processed at controlled intervals.
🎯 Exploit Status
Exploitation requires no authentication and can be performed with simple HTTP requests to the password reset endpoint. The vulnerability is well-documented in security advisories.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check with vendor for updated version
Vendor Advisory: https://www.phpjabbers.com/
Restart Required: No
Instructions:
1. Contact PHPJabbers for updated version or patch. 2. Apply the vendor-provided fix. 3. Test the password reset functionality. 4. Monitor for any issues post-patch.
🔧 Temporary Workarounds
Implement Web Application Firewall (WAF) Rules
allConfigure WAF to rate limit requests to the password reset endpoint
WAF-specific configuration commands vary by vendor
Manual Rate Limiting Implementation
phpAdd custom rate limiting code to the password reset functionality
Implement PHP session-based or IP-based rate limiting in the forgot password script
🧯 If You Can't Patch
- Disable the 'Forgot Password' feature entirely if not needed
- Implement IP-based blocking for excessive password reset attempts at network perimeter
🔍 How to Verify
Check if Vulnerable:
Test the forgot password functionality by sending multiple reset requests for the same user within a short timeframe and check if rate limiting prevents excessive emails.Check Version:
Check the system version in the admin panel or review the software documentation/configuration files.Verify Fix Applied:
After applying fix, test the same scenario - multiple reset requests should be blocked or delayed with appropriate error messages.📡 Detection & Monitoring
Log Indicators:
- Multiple password reset requests for same user in short timeframe
- Excessive 'forgot password' API calls
- Email server logs showing spike in password reset emails
Network Indicators:
- High volume of POST requests to password reset endpoint
- Multiple requests from same IP to /forgot-password or similar endpoints
SIEM Query:
source="web_logs" AND (uri_path="/forgot-password" OR uri_path="/reset-password") AND count() > 10 within 1 minute