CVE-2021-3832
📋 TL;DR
CVE-2021-3832 is a critical remote code execution vulnerability in Integria IMS version 5.0.92 that allows unauthenticated attackers to upload malicious files and execute arbitrary code on affected systems. This affects all organizations running the vulnerable version of this IT service management software. The vulnerability resides in the AsyncUpload() function which lacks proper file validation.
💻 Affected Systems
- Integria IMS
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to install malware, steal sensitive data, pivot to internal networks, and establish persistent backdoors.
Likely Case
Attackers gain initial access to deploy ransomware, cryptocurrency miners, or data exfiltration tools, leading to operational disruption and data breaches.
If Mitigated
Attack attempts are blocked at network perimeter or detected early, preventing successful exploitation and limiting impact to failed attempts.
🎯 Exploit Status
The vulnerability is straightforward to exploit with publicly available proof-of-concept code. No authentication or special privileges required.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 5.0.93 and later
Vendor Advisory: https://integriaims.com/en/services/updates/
Restart Required: Yes
Instructions:
1. Backup current installation and database. 2. Download latest version from vendor website. 3. Follow vendor upgrade instructions for version 5.0.93+. 4. Restart application services. 5. Verify upgrade completed successfully.
🔧 Temporary Workarounds
Web Application Firewall Rules
allBlock file upload requests to vulnerable endpoints using WAF rules
WAF specific - configure rules to block POST requests to */async_upload* endpoints
Network Segmentation
linuxRestrict access to Integria IMS web interface to trusted networks only
firewall-cmd --permanent --add-rich-rule='rule family="ipv4" source address="TRUSTED_NETWORK" port port="80" protocol="tcp" accept'
firewall-cmd --reload
🧯 If You Can't Patch
- Implement strict network access controls to limit exposure to trusted IP addresses only
- Deploy web application firewall with rules specifically blocking file upload functionality to vulnerable endpoints
🔍 How to Verify
Check if Vulnerable:
Check Integria IMS version in admin panel or by examining application files. Version 5.0.92 is vulnerable.Check Version:
Check admin panel or examine version.txt in installation directoryVerify Fix Applied:
Verify version is 5.0.93 or higher in admin interface and test file upload functionality with malicious payloads (in safe environment).📡 Detection & Monitoring
Log Indicators:
- Multiple failed file upload attempts
- Unusual file uploads with executable extensions
- POST requests to /async_upload endpoints from unexpected sources
Network Indicators:
- Unusual outbound connections from Integria IMS server
- File upload requests with suspicious filenames or content
SIEM Query:
source="integria_ims_logs" AND (url_path="/async_upload" OR file_upload="true") AND (file_extension="php" OR file_extension="jsp" OR file_extension="asp")