CVE-2023-29625
📋 TL;DR
Employee Performance Evaluation System v1.0 contains an arbitrary file upload vulnerability that allows attackers to upload malicious files to the server. This can lead to remote code execution, potentially compromising the entire system. Organizations using this specific software version are affected.
💻 Affected Systems
- Employee Performance Evaluation System
📦 What is this software?
Employee Performance Evaluation System by Employee Performance Evaluation System Project
View all CVEs affecting Employee Performance Evaluation System →
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining full control over the server, data exfiltration, ransomware deployment, or use as a pivot point for further network attacks.
Likely Case
Webshell deployment leading to persistent access, data theft, and potential lateral movement within the network.
If Mitigated
File uploads are properly validated and restricted, preventing malicious file execution while maintaining legitimate functionality.
🎯 Exploit Status
Exploitation requires uploading a crafted malicious file to the vulnerable endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Consider workarounds or replacing the software.
🔧 Temporary Workarounds
Implement File Upload Restrictions
allConfigure web server to restrict file uploads to specific extensions and implement server-side validation
# Configure web server (e.g., Apache/Nginx) to block upload of executable files
# Implement server-side file type validation in application code
Web Application Firewall Rules
allDeploy WAF rules to block malicious file uploads and suspicious patterns
# Example ModSecurity rule: SecRule FILES_TMPNAMES "@rx \.(php|asp|jsp|exe)$" "id:1001,phase:2,deny"
🧯 If You Can't Patch
- Isolate the vulnerable system in a restricted network segment
- Implement strict access controls and monitor all file upload activities
🔍 How to Verify
Check if Vulnerable:
Test file upload functionality by attempting to upload files with executable extensions (e.g., .php, .asp, .jsp) and check if they're accepted without validation.Check Version:
Check application version in admin panel or configuration filesVerify Fix Applied:
Attempt to upload malicious files and verify they are rejected with proper error messages and logging.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads with executable extensions
- Multiple failed upload attempts
- Successful uploads of non-standard file types
Network Indicators:
- HTTP POST requests to upload endpoints with suspicious file names
- Traffic patterns indicating file upload exploitation
SIEM Query:
source="web_server" AND (method="POST" AND uri="*upload*" AND (file_extension="php" OR file_extension="asp" OR file_extension="jsp"))