CVE-2016-9568
📋 TL;DR
CVE-2016-9568 is a security design flaw in Carbon Black Sensor that allows unprivileged users to interact with the sensor and perform unauthorized actions. This vulnerability enables local attackers to bypass intended security controls and potentially manipulate sensor functionality. Organizations using affected Carbon Black Sensor versions are at risk.
💻 Affected Systems
- Carbon Black Sensor
📦 What is this software?
Carbon Black by Carbonblack
⚠️ Risk & Real-World Impact
Worst Case
An attacker could disable or manipulate the Carbon Black Sensor, allowing malware to execute undetected, bypass endpoint protection, and potentially gain persistence on the system.
Likely Case
Local users could tamper with sensor settings, disable monitoring capabilities, or interfere with threat detection, compromising endpoint security visibility.
If Mitigated
With proper access controls and network segmentation, impact is limited to isolated systems, though sensor functionality could still be locally disrupted.
🎯 Exploit Status
Exploitation requires local access but is straightforward once access is obtained. Public details and proof-of-concept are available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Carbon Black Sensor 6.1.1 and later
Vendor Advisory: https://www.vmware.com/security/advisories/VMSA-2017-0001.html
Restart Required: Yes
Instructions:
1. Download Carbon Black Sensor version 6.1.1 or later from the Carbon Black portal. 2. Deploy the updated sensor to all endpoints. 3. Restart endpoints or sensor services to apply changes.
🔧 Temporary Workarounds
Restrict Local Access
allLimit local user access to systems running Carbon Black Sensor to only authorized administrators.
Enhanced Monitoring
allImplement additional monitoring for sensor process manipulation and unexpected sensor restarts.
🧯 If You Can't Patch
- Implement strict least-privilege access controls to limit who can log into systems with Carbon Black Sensor
- Deploy network segmentation to isolate systems with vulnerable sensors from critical assets
🔍 How to Verify
Check if Vulnerable:
Check Carbon Black Sensor version: On Windows, check installed programs list; on Linux/macOS, check sensor version via command line or management console.Check Version:
Windows: Check Programs and Features; Linux: Check /opt/cb/version.txt or similar; macOS: Check installed version via system profilerVerify Fix Applied:
Verify sensor version is 6.1.1 or higher and confirm sensor is functioning normally through the Carbon Black management console.📡 Detection & Monitoring
Log Indicators:
- Unexpected sensor service stops/restarts
- Unauthorized user attempts to interact with sensor processes
- Changes to sensor configuration files by non-admin users
Network Indicators:
- Unusual gaps in sensor heartbeat communications
- Sudden changes in endpoint reporting patterns
SIEM Query:
source="carbon_black" AND (event_type="service_stop" OR event_type="config_change") AND user!="SYSTEM" AND user!="Administrator"