CVE-2023-45349
📋 TL;DR
This vulnerability exposes sensitive information in Atos Unify OpenScape 4000 systems that could allow attackers to move laterally to backup systems via AShbr. It affects specific versions of OpenScape 4000 Assistant and Manager software. Organizations using these vulnerable versions are at risk of unauthorized access to backup infrastructure.
💻 Affected Systems
- Atos Unify OpenScape 4000 Assistant
- Atos Unify OpenScape 4000 Manager
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain access to backup systems, potentially compromising backup data integrity, exfiltrating sensitive information, or disrupting disaster recovery capabilities.
Likely Case
Unauthorized access to backup systems leading to data exposure and potential lateral movement within the network.
If Mitigated
Limited impact with proper network segmentation and access controls preventing lateral movement to backup systems.
🎯 Exploit Status
Requires network access to vulnerable systems and knowledge of the AShbr component.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: V10 R1.34.7 or later for affected V10 R1 versions
Vendor Advisory: https://networks.unify.com/security/advisories/OBSO-2306-01.pdf
Restart Required: Yes
Instructions:
1. Download the patch from Unify support portal. 2. Apply the patch to affected OpenScape 4000 systems. 3. Restart the systems as required. 4. Verify the patch installation.
🔧 Temporary Workarounds
Network Segmentation
allIsolate OpenScape 4000 systems from backup infrastructure using firewall rules
Access Control Restrictions
allImplement strict access controls to limit who can access AShbr components
🧯 If You Can't Patch
- Implement strict network segmentation between OpenScape systems and backup infrastructure
- Monitor network traffic to/from OpenScape systems for unusual access patterns
🔍 How to Verify
Check if Vulnerable:
Check system version against affected versions list and review AShbr component configurationCheck Version:
Check system administration interface or contact Unify support for version verificationVerify Fix Applied:
Verify system version is V10 R1.34.7 or later and test backup system access controls📡 Detection & Monitoring
Log Indicators:
- Unusual access patterns to AShbr components
- Failed or successful unauthorized access attempts to backup systems
Network Indicators:
- Unexpected network traffic between OpenScape systems and backup infrastructure
- AShbr protocol traffic from unauthorized sources
SIEM Query:
source_ip IN (OpenScape_IPs) AND dest_ip IN (Backup_System_IPs) AND protocol='AShbr'🔗 References
- https://networks.unify.com/security/advisories/OBSO-2306-01.pdf
- https://www.news.de/technik/856969401/unify-openscape-4000-gefaehrdet-it-sicherheitswarnung-vom-bsi-und-bug-report-bekannte-schwachstellen-und-sicherheitsluecken/1/
- https://networks.unify.com/security/advisories/OBSO-2306-01.pdf
- https://www.news.de/technik/856969401/unify-openscape-4000-gefaehrdet-it-sicherheitswarnung-vom-bsi-und-bug-report-bekannte-schwachstellen-und-sicherheitsluecken/1/
