CVE-2023-29241
📋 TL;DR
This vulnerability in Bosch Building Integration System (BIS) 5.0 involves incorrect information in cybersecurity documentation that could lead to misconfiguration, allowing local users to access data via the network. It affects organizations using Bosch BIS 5.0 with improper configurations based on flawed guidance.
💻 Affected Systems
- Bosch Building Integration System (BIS)
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Unauthorized local users gain network access to sensitive building management data, potentially enabling data theft, system manipulation, or lateral movement within the network.
Likely Case
Local users with some system access exploit misconfigurations to access data they shouldn't have permission to view, compromising data confidentiality.
If Mitigated
Proper configuration following corrected guidance prevents unauthorized data access, maintaining normal system operation with appropriate access controls.
🎯 Exploit Status
Exploitation requires local access and misconfiguration based on flawed documentation; no technical exploit code needed beyond following incorrect guidance.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Updated cybersecurity guidebook
Vendor Advisory: https://psirt.bosch.com/security-advisories/BOSCH-SA-988400-BT.html
Restart Required: No
Instructions:
1. Review the updated Bosch cybersecurity guidebook. 2. Audit current BIS 5.0 configurations. 3. Reconfigure systems according to corrected guidance. 4. Verify configurations match updated security recommendations.
🔧 Temporary Workarounds
Configuration Audit and Correction
allManually audit and correct configurations that may have been set based on the flawed guidebook guidance
🧯 If You Can't Patch
- Implement strict network segmentation to isolate BIS systems from general network access
- Enhance monitoring of local user activities and data access patterns on BIS systems
🔍 How to Verify
Check if Vulnerable:
Review current configurations against the corrected cybersecurity guidebook to identify any settings that follow the incorrect guidanceCheck Version:
Check BIS system version through administrative interface or consult system documentationVerify Fix Applied:
Confirm all configurations align with updated guidebook recommendations and test that local users cannot access unauthorized data📡 Detection & Monitoring
Log Indicators:
- Unusual data access patterns by local users
- Access attempts to network resources from BIS systems
Network Indicators:
- Unexpected network traffic from BIS systems to internal resources
SIEM Query:
source="BIS_System" AND (event_type="data_access" OR event_type="network_connection") AND user_type="local"