CVE-2023-44824
📋 TL;DR
This vulnerability in Expense Management System v1.0 allows a local attacker to upload a malicious file to the sign-up.php component, leading to arbitrary code execution. The attacker must have local access to the system to exploit this flaw. Organizations using this specific version of the software are affected.
💻 Affected Systems
- Expense Management System
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining complete control over the server, potentially leading to data theft, ransomware deployment, or lateral movement within the network.
Likely Case
Local privilege escalation leading to unauthorized access to sensitive financial data within the expense management system and potential system disruption.
If Mitigated
Limited impact with proper file upload restrictions and input validation preventing malicious file execution.
🎯 Exploit Status
Exploitation requires local access to the system. The vulnerability is in a sign-up component, suggesting some level of access is needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: No official vendor advisory found in provided references
Restart Required: No
Instructions:
1. Check vendor website for security updates
2. Apply any available patches for Expense Management System
3. Verify the fix by testing file upload functionality
🔧 Temporary Workarounds
Disable File Upload in sign-up.php
allRemove or disable file upload functionality in the vulnerable sign-up.php component
# Edit sign-up.php to remove file upload code
# Or disable the component entirely
Implement File Upload Restrictions
allAdd server-side validation to restrict file types and sanitize uploads
# Add PHP code to validate file extensions
# Implement file type checking
# Set upload directory permissions to prevent execution
🧯 If You Can't Patch
- Implement network segmentation to isolate the expense management system
- Deploy web application firewall with file upload protection rules
🔍 How to Verify
Check if Vulnerable:
Check if you're running Expense Management System v1.0 and examine the sign-up.php component for unrestricted file upload functionalityCheck Version:
# Check application version in admin panel or configuration files
# Look for version information in source code or documentationVerify Fix Applied:
Test file upload functionality with various file types to ensure only allowed extensions are accepted and files cannot be executed📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to sign-up.php
- Execution of unexpected file types in upload directories
- Multiple failed upload attempts with suspicious extensions
Network Indicators:
- Unusual traffic patterns to sign-up.php endpoint
- File uploads with executable extensions
SIEM Query:
source="web_server" AND uri="/sign-up.php" AND (file_upload="true" OR file_extension IN ("php", "exe", "sh", "py"))🔗 References
- https://abstracted-howler-727.notion.site/CVE-2023-44824-ab76909b4a0e477b87aa8d0ca4aa4ca7
- https://abstracted-howler-727.notion.site/Vulnerability-Description-ccc2e6489a0d43859c61a7982e649da1
- https://gist.github.com/Muscial/e46c4e4031d25a3684cda124dfc45d96
- https://abstracted-howler-727.notion.site/CVE-2023-44824-ab76909b4a0e477b87aa8d0ca4aa4ca7
- https://abstracted-howler-727.notion.site/Vulnerability-Description-ccc2e6489a0d43859c61a7982e649da1
- https://gist.github.com/Muscial/e46c4e4031d25a3684cda124dfc45d96
