CVE-2022-24239
📋 TL;DR
ACEweb Online Portal 3.5.065 contains an unrestricted file upload vulnerability in the attachments.awp component. This allows attackers to upload malicious files without proper validation, potentially leading to remote code execution. All systems running the vulnerable version are affected.
💻 Affected Systems
- ACEweb Online Portal
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise via remote code execution, data theft, and lateral movement within the network.
Likely Case
Webshell deployment leading to unauthorized access, data exfiltration, and potential ransomware deployment.
If Mitigated
File upload attempts blocked or quarantined with no successful exploitation.
🎯 Exploit Status
Unrestricted file upload vulnerabilities are typically easy to exploit with readily available tools.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.5.066 or later
Vendor Advisory: https://www.aceware.com/forum/viewtopic.php?f=7&t=481
Restart Required: Yes
Instructions:
1. Download the latest version from the vendor website. 2. Backup current installation. 3. Install the update following vendor instructions. 4. Restart the ACEweb service.
🔧 Temporary Workarounds
Web Application Firewall (WAF) Rules
allImplement WAF rules to block file uploads with dangerous extensions or suspicious patterns.
File Upload Restriction
allConfigure the web server to restrict file uploads to specific directories with execute permissions disabled.
🧯 If You Can't Patch
- Isolate the ACEweb server in a DMZ with strict network segmentation and access controls.
- Implement file integrity monitoring on the upload directory and alert on any unauthorized file changes.
🔍 How to Verify
Check if Vulnerable:
Check the ACEweb portal version in the admin interface or configuration files. If version is 3.5.065, the system is vulnerable.Check Version:
Check the admin panel or configuration files for version information.Verify Fix Applied:
After patching, verify the version shows 3.5.066 or later. Test file upload functionality with various file types to ensure proper validation.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to attachments.awp endpoint
- Files with executable extensions in upload directories
- Multiple failed upload attempts
Network Indicators:
- HTTP POST requests to attachments.awp with unusual file types
- Traffic patterns indicating file upload exploitation
SIEM Query:
source="aceweb" AND (uri="*attachments.awp*" OR method="POST") AND (file_extension="php" OR file_extension="jsp" OR file_extension="asp" OR file_extension="exe")