CVE-2021-36560
📋 TL;DR
CVE-2021-36560 is an authentication bypass vulnerability in Phone Shop Sales Management System 1.0 that allows attackers to gain admin access without valid credentials. This affects any organization using this specific PHP-based sales management software. Attackers can completely compromise the system and access sensitive sales data.
💻 Affected Systems
- Phone Shop Sales Management System
📦 What is this software?
Phone Shop Sales Management System by Phone Shop Sales Management System Project
View all CVEs affecting Phone Shop Sales Management System →
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with admin account takeover, allowing data theft, system manipulation, and potential lateral movement to connected systems.
Likely Case
Unauthorized admin access leading to data exfiltration, system configuration changes, and potential installation of backdoors.
If Mitigated
Limited impact if proper network segmentation, monitoring, and access controls prevent exploitation or contain damage.
🎯 Exploit Status
Authentication bypass vulnerabilities typically have simple exploitation paths; public disclosure increases weaponization likelihood.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.sourcecodester.com/
Restart Required: No
Instructions:
No official patch available. Consider replacing with alternative software or implementing custom security fixes.
🔧 Temporary Workarounds
Network Access Restriction
linuxRestrict access to the application using firewall rules or network segmentation
iptables -A INPUT -p tcp --dport 80 -s trusted_network -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
Web Application Firewall
allImplement WAF rules to detect and block authentication bypass attempts
🧯 If You Can't Patch
- Implement strong network segmentation to isolate the vulnerable system
- Enable detailed logging and monitoring for authentication attempts and admin access patterns
🔍 How to Verify
Check if Vulnerable:
Check if running Phone Shop Sales Management System version 1.0. Attempt to access admin functionality without proper authentication.Check Version:
Check source code files or documentation for version information; typically in config files or footer.Verify Fix Applied:
Test authentication mechanisms thoroughly. Verify admin access requires valid credentials.📡 Detection & Monitoring
Log Indicators:
- Failed authentication attempts followed by successful admin access
- Admin login from unusual IP addresses or user agents
- Multiple rapid authentication attempts
Network Indicators:
- HTTP requests to admin endpoints without proper session cookies
- Unusual traffic patterns to authentication endpoints
SIEM Query:
source="web_logs" (url="*/admin*" OR url="*/login*") AND (status=200 OR status=302) AND NOT (user_agent="*bot*" OR user_agent="*crawl*")