CVE-2022-23100
📋 TL;DR
CVE-2022-23100 is a critical OS command injection vulnerability in OX App Suite's Documentconverter component that allows attackers to execute arbitrary operating system commands on the server. This affects OX App Suite installations up to version 7.10.6 when processing email attachments or other documents. Organizations using vulnerable versions of OX App Suite for email and collaboration are at risk.
💻 Affected Systems
- OX App Suite
📦 What is this software?
Ox App Suite by Open Xchange
⚠️ Risk & Real-World Impact
Worst Case
Full server compromise allowing complete control over the affected system, data exfiltration, lateral movement to other systems, and persistent backdoor installation.
Likely Case
Remote code execution leading to data theft, service disruption, and potential ransomware deployment on vulnerable servers.
If Mitigated
Limited impact with proper network segmentation, minimal privileges, and security controls preventing command execution.
🎯 Exploit Status
Exploitation requires user interaction (opening/sending email with malicious attachment) but the technical complexity is low once the attack vector is accessed. Public exploit details are available in security advisories.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 7.10.7 and later
Vendor Advisory: https://open-xchange.com
Restart Required: Yes
Instructions:
1. Backup your OX App Suite configuration and data. 2. Download and install OX App Suite version 7.10.7 or later from the official vendor. 3. Apply the update following vendor documentation. 4. Restart all OX App Suite services. 5. Verify the update was successful.
🔧 Temporary Workarounds
Disable Documentconverter component
linuxTemporarily disable the vulnerable Documentconverter feature to prevent exploitation while planning patching.
# Edit OX App Suite configuration to disable document conversion
# Consult vendor documentation for specific configuration changes
Attachment filtering
allImplement email attachment filtering to block potentially malicious document types from reaching the Documentconverter.
# Configure email gateway or OX App Suite to filter attachments
# Block or quarantine suspicious attachment types
🧯 If You Can't Patch
- Implement strict network segmentation to isolate OX App Suite servers from critical infrastructure
- Deploy application-level firewalls or WAF rules to detect and block command injection attempts
🔍 How to Verify
Check if Vulnerable:
Check OX App Suite version via admin interface or command line. Versions 7.10.6 and earlier are vulnerable.Check Version:
oxinstaller --version or check OX App Suite admin interfaceVerify Fix Applied:
Verify OX App Suite version is 7.10.7 or later and test document conversion functionality works without security issues.📡 Detection & Monitoring
Log Indicators:
- Unusual command execution in system logs
- Documentconverter process spawning unexpected child processes
- Failed document conversion attempts with suspicious parameters
Network Indicators:
- Unusual outbound connections from OX App Suite server
- Command and control traffic patterns
SIEM Query:
source="ox-app-suite" AND (process_execution OR command_injection OR documentconverter_error)