CVE-2023-48257
📋 TL;DR
This vulnerability in Bosch security systems allows attackers to access sensitive data or achieve remote code execution with root privileges. It affects authenticated users directly via HTTP requests and unauthenticated users indirectly through backup package manipulation. The vulnerability impacts multiple Bosch security products.
💻 Affected Systems
- Bosch BIS, Bosch DIVAR IP, Bosch BVMS
📦 What is this software?
Nexo Os by Bosch
⚠️ Risk & Real-World Impact
Worst Case
Remote attacker gains root-level remote code execution, potentially taking full control of affected security devices and accessing all data.
Likely Case
Unauthenticated attackers access sensitive data from exported backup packages or craft malicious import packages to compromise authenticated users.
If Mitigated
With proper network segmentation and access controls, impact limited to isolated security systems without lateral movement.
🎯 Exploit Status
Exploitation requires understanding of backup/restore mechanisms and HTTP request crafting
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to Bosch security advisory for specific product versions
Vendor Advisory: https://psirt.bosch.com/security-advisories/BOSCH-SA-711465.html
Restart Required: Yes
Instructions:
1. Review Bosch security advisory BOSCH-SA-711465. 2. Identify affected products and versions. 3. Apply vendor-provided patches. 4. Restart affected systems. 5. Verify patch installation.
🔧 Temporary Workarounds
Disable backup/restore functionality
allTemporarily disable backup creation and import features if not critically needed
Network segmentation
allIsolate Bosch security systems from untrusted networks and limit access to management interfaces
🧯 If You Can't Patch
- Implement strict network access controls to limit who can access backup/restore functionality
- Monitor for unusual backup creation or import activities and investigate anomalies
🔍 How to Verify
Check if Vulnerable:
Check system version against affected versions listed in Bosch advisory BOSCH-SA-711465Check Version:
Check product-specific version commands via device web interface or CLIVerify Fix Applied:
Verify installed version matches or exceeds patched versions specified in vendor advisory📡 Detection & Monitoring
Log Indicators:
- Unusual backup creation or import activities
- HTTP requests to backup/restore endpoints from unexpected sources
- Failed authentication attempts followed by backup operations
Network Indicators:
- HTTP traffic to backup/restore endpoints from unauthorized IPs
- Large data transfers during backup operations to unexpected destinations
SIEM Query:
source_ip NOT IN (allowed_management_ips) AND (uri CONTAINS 'backup' OR uri CONTAINS 'restore' OR uri CONTAINS 'import')