CVE-2019-6957
📋 TL;DR
CVE-2019-6957 is a critical buffer overflow vulnerability in multiple Bosch security and video management products that allows remote attackers to execute arbitrary code via the network interface. This affects all Bosch Video Management System versions 9.0 and below, DIVAR IP systems, Access Professional Edition, and several other Bosch security products. Successful exploitation could lead to complete system compromise.
💻 Affected Systems
- Bosch Video Management System (BVMS)
- DIVAR IP 2000
- DIVAR IP 3000
- DIVAR IP 5000
- DIVAR IP 7000
- Video Recording Manager (VRM)
- Video Streaming Gateway (VSG)
- Configuration Manager
- Building Integration System (BIS) with Video Engine
- Access Professional Edition (APE)
- Access Easy Controller (AEC)
- Bosch Video Client (BVC)
- Video SDK (VSDK)
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote unauthenticated attacker gains full system control, installs malware, pivots to internal networks, and disrupts physical security systems.
Likely Case
Attacker executes arbitrary code with system privileges, potentially installing ransomware, stealing video footage, or disabling security systems.
If Mitigated
With proper network segmentation and access controls, impact limited to isolated security system segment without lateral movement.
🎯 Exploit Status
Buffer overflow via network interface suggests relatively straightforward exploitation. No public exploit code found, but CVSS 9.8 indicates weaponization is likely.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: BVMS 9.1 and above, updated firmware for hardware appliances
Vendor Advisory: https://media.boschsecurity.com/fs/media/pb/security_advisories/bosch-2019-0403bt-cve-2019-6957_security_advisory_software_buffer_overflow.pdf
Restart Required: Yes
Instructions:
1. Download latest firmware/software from Bosch Security Portal. 2. Backup current configuration. 3. Apply updates following Bosch documentation. 4. Restart systems. 5. Verify functionality.
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected systems from untrusted networks and restrict access to management interfaces.
Firewall Rules
allImplement strict firewall rules to limit network access to only authorized management stations.
🧯 If You Can't Patch
- Segment vulnerable systems on isolated VLAN with strict access controls
- Implement network-based intrusion prevention systems to detect and block exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check product version in system administration interface. If BVMS version is 9.0 or below, or using affected hardware with outdated firmware, system is vulnerable.Check Version:
Check via product administration interface: BVMS Admin Panel → System Information, or hardware appliance web interface → System StatusVerify Fix Applied:
Verify version is updated to BVMS 9.1+ or latest firmware versions as specified in Bosch advisory. Check that security patches are applied in system logs.📡 Detection & Monitoring
Log Indicators:
- Unusual network connections to management ports
- Process crashes or restarts
- Unexpected system reboots
- Failed authentication attempts followed by successful exploitation
Network Indicators:
- Unusual traffic patterns to management interfaces (typically ports 80, 443, 8080)
- Buffer overflow patterns in network traffic
- Unexpected outbound connections from security systems
SIEM Query:
source_ip IN (security_system_subnet) AND (destination_port IN (80,443,8080) AND payload_size > threshold) OR (process_name IN (bvms*, divar*) AND event_type='crash')