CVE-2023-35031
📋 TL;DR
This vulnerability allows authenticated users to execute arbitrary commands on affected Atos Unify OpenScape 4000 systems through command injection. Attackers with valid credentials can potentially gain full system control. Affected products include Assistant V10 R1, Assistant V10 R0, Manager V10 R1, and Manager V10 R0.
💻 Affected Systems
- Atos Unify OpenScape 4000 Assistant
- Atos Unify OpenScape 4000 Manager
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise leading to data theft, lateral movement, ransomware deployment, or complete system takeover.
Likely Case
Privilege escalation leading to unauthorized access to sensitive data and system configuration manipulation.
If Mitigated
Limited impact if proper network segmentation, least privilege access, and monitoring are implemented.
🎯 Exploit Status
Exploitation requires authenticated access but command injection vulnerabilities are typically straightforward to exploit once access is obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Assistant V10 R1.42.0, Assistant V10 R1.34.8, Manager V10 R1.42.0, Manager V10 R1.34.8
Vendor Advisory: https://networks.unify.com/security/advisories/OBSO-2305-01.pdf
Restart Required: Yes
Instructions:
1. Download patches from Unify support portal. 2. Backup system configuration. 3. Apply patches according to vendor documentation. 4. Restart affected services. 5. Verify patch installation.
🔧 Temporary Workarounds
Restrict User Access
allLimit authenticated user access to only necessary personnel and implement strict access controls.
Network Segmentation
allIsolate OpenScape systems from critical network segments and implement firewall rules to restrict access.
🧯 If You Can't Patch
- Implement strict network access controls and segment affected systems
- Enforce least privilege access and monitor all authenticated user activity
🔍 How to Verify
Check if Vulnerable:
Check system version via web interface or CLI and compare against vulnerable versions listed in advisory.Check Version:
Check via system web interface or consult vendor documentation for version query commands.Verify Fix Applied:
Verify installed version is V10 R1.42.0 or V10 R1.34.8 or later for affected products.📡 Detection & Monitoring
Log Indicators:
- Unusual command execution patterns
- Multiple failed authentication attempts followed by successful login
- Suspicious process creation from web services
Network Indicators:
- Unusual outbound connections from OpenScape systems
- Traffic to unexpected ports or IP addresses
SIEM Query:
source="openscape*" AND (event_type="command_execution" OR process_name="cmd.exe" OR process_name="/bin/sh")🔗 References
- https://networks.unify.com/security/advisories/OBSO-2305-01.pdf
- https://www.news.de/technik/856882353/unify-openscape-4000-gefaehrdet-it-sicherheitswarnung-vom-bsi-und-bug-report-bekannte-schwachstellen-und-sicherheitsluecken/1/
- https://networks.unify.com/security/advisories/OBSO-2305-01.pdf
- https://www.news.de/technik/856882353/unify-openscape-4000-gefaehrdet-it-sicherheitswarnung-vom-bsi-und-bug-report-bekannte-schwachstellen-und-sicherheitsluecken/1/
