CVE-2021-23862
📋 TL;DR
This vulnerability allows authenticated administrative users to send specially crafted configuration packets that execute arbitrary commands with system-level privileges. It affects Bosch security and video management systems including VRM, DIVAR IP, BVMS with VRM, and VIDEOJET decoders. Attackers with administrative access can achieve remote code execution on affected devices.
💻 Affected Systems
- VRM
- DIVAR IP
- BVMS with VRM installed
- VIDEOJET decoder VJD-7513
- VIDEOJET decoder VJD-8000
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to execute arbitrary commands as root/system, potentially leading to data theft, system destruction, or lateral movement within networks.
Likely Case
Authenticated attackers gaining full control of affected systems to install malware, exfiltrate sensitive video/security data, or disrupt security operations.
If Mitigated
Limited impact if proper network segmentation, least privilege access controls, and monitoring are implemented to detect anomalous administrative activity.
🎯 Exploit Status
Exploitation requires administrative credentials but is straightforward once authenticated. No public exploit code is known.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific product versions
Vendor Advisory: https://psirt.bosch.com/security-advisories/bosch-sa-043434-bt.html
Restart Required: Yes
Instructions:
1. Review Bosch security advisory SA-043434-BT. 2. Identify affected products and versions. 3. Apply vendor-provided patches or firmware updates. 4. Restart affected systems. 5. Verify patch installation.
🔧 Temporary Workarounds
Network Segmentation
allRestrict administrative interface access to trusted networks only
Access Control Hardening
allImplement strict administrative access controls and multi-factor authentication
🧯 If You Can't Patch
- Isolate affected systems in dedicated VLANs with strict firewall rules
- Implement network monitoring for anomalous configuration packet traffic
🔍 How to Verify
Check if Vulnerable:
Check system version against vendor advisory and verify if running vulnerable firmwareCheck Version:
Check via product web interface or CLI (product-specific commands vary)Verify Fix Applied:
Verify installed firmware version matches patched versions listed in vendor advisory📡 Detection & Monitoring
Log Indicators:
- Unusual configuration changes
- Multiple failed authentication attempts followed by successful login
- Unexpected command execution logs
Network Indicators:
- Anomalous configuration packet traffic to administrative interfaces
- Unexpected outbound connections from security systems
SIEM Query:
source="bosch_security_system" AND (event_type="configuration_change" OR event_type="command_execution")