CVE-2023-48266
📋 TL;DR
This CVE describes a stack-based buffer overflow vulnerability in Bosch products that allows unauthenticated remote attackers to cause denial-of-service or potentially execute arbitrary code via specially crafted network requests. The vulnerability affects specific Bosch building automation products running vulnerable firmware versions. Organizations using affected Bosch devices are at risk.
💻 Affected Systems
- Bosch Building Automation Controllers
📦 What is this software?
Nexo Os by Bosch
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data exfiltration, and lateral movement within the network.
Likely Case
Denial-of-service causing service disruption and system instability.
If Mitigated
Limited impact with proper network segmentation and access controls in place.
🎯 Exploit Status
CWE-121 indicates stack-based buffer overflow, which typically requires specific knowledge of memory layout but is exploitable by skilled attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to Bosch advisory BOSCH-SA-711465 for specific patched versions
Vendor Advisory: https://psirt.bosch.com/security-advisories/BOSCH-SA-711465.html
Restart Required: Yes
Instructions:
1. Review Bosch advisory BOSCH-SA-711465 2. Identify affected products 3. Download and apply firmware updates from Bosch 4. Restart affected devices 5. Verify patch installation
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected devices from untrusted networks and limit access to trusted sources only.
Access Control Lists
allImplement strict firewall rules to restrict network access to affected devices.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate affected devices
- Deploy intrusion detection/prevention systems to monitor for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against vulnerable versions listed in Bosch advisory BOSCH-SA-711465Check Version:
Device-specific command - consult product documentation for firmware version checkVerify Fix Applied:
Verify firmware version has been updated to patched version specified in Bosch advisory📡 Detection & Monitoring
Log Indicators:
- Unusual network traffic patterns
- Multiple failed connection attempts
- System crash or restart logs
Network Indicators:
- Unusual traffic to affected device ports
- Malformed network packets targeting vulnerable services
SIEM Query:
Search for network traffic to affected devices with unusual patterns or from untrusted sources