CVE-2024-8463
📋 TL;DR
This vulnerability allows authenticated users to bypass file upload restrictions in PHPGurukul Job Portal 1.0, potentially uploading malicious files that could lead to remote code execution via webshell. Organizations using this specific version of the job portal software are affected.
💻 Affected Systems
- PHPGurukul Job Portal
📦 What is this software?
Job Portal by Phpgurukul
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to execute arbitrary code, steal sensitive data, pivot to other systems, and maintain persistent access.
Likely Case
Attackers upload webshells to gain unauthorized access, execute commands, and potentially compromise the entire web server and connected systems.
If Mitigated
Limited impact with proper file upload validation, web application firewalls, and restricted file permissions preventing execution.
🎯 Exploit Status
Exploitation requires authenticated access but the bypass technique is straightforward once authenticated.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Consider upgrading to a newer version if available, or implement workarounds and monitoring.
🔧 Temporary Workarounds
Implement strict file upload validation
allAdd server-side validation for file types, extensions, and content checking before allowing uploads.
Restrict upload directory permissions
linuxConfigure upload directories to prevent execution of uploaded files.
chmod 644 /path/to/upload/directory/*
chown www-data:www-data /path/to/upload/directory
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block suspicious file upload patterns
- Disable file upload functionality entirely if not required
🔍 How to Verify
Check if Vulnerable:
Check if running PHPGurukul Job Portal version 1.0 and test file upload functionality with restricted file types.Check Version:
Check application files for version information or review installation documentation.Verify Fix Applied:
Test file upload with previously blocked file types to ensure proper validation is in place.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads with suspicious extensions (.php, .jsp, .asp)
- Multiple failed upload attempts followed by successful upload
- Webshell access patterns in access logs
Network Indicators:
- POST requests to upload endpoints with unusual file types
- Subsequent requests to uploaded files with command parameters
SIEM Query:
source="web_server" (method="POST" uri="*upload*" AND (file_extension="php" OR file_extension="jsp" OR file_extension="asp"))