CVE-2023-3313
📋 TL;DR
This vulnerability allows unauthorized users to execute arbitrary system commands through improper input sanitization in the ESM certificate API. Attackers could escalate privileges or run malicious commands on affected systems. Organizations using vulnerable versions of the affected software are at risk.
💻 Affected Systems
- Trellix ESM (Enterprise Security Manager)
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with administrative privileges, data exfiltration, lateral movement across network, and persistent backdoor installation.
Likely Case
Privilege escalation leading to unauthorized access to sensitive systems and data, potentially enabling further attacks within the environment.
If Mitigated
Limited impact due to network segmentation, least privilege access controls, and proper input validation at other layers.
🎯 Exploit Status
Requires some level of access to the ESM certificate API. The vulnerability is in input sanitization, making exploitation relatively straightforward for attackers with API access.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 11.7.0 and later
Vendor Advisory: https://kcm.trellix.com/corporate/index?page=content&id=SB10403
Restart Required: Yes
Instructions:
1. Download ESM version 11.7.0 or later from Trellix support portal. 2. Backup current configuration and data. 3. Install the update following vendor documentation. 4. Restart ESM services. 5. Verify successful update and functionality.
🔧 Temporary Workarounds
Disable Certificate API
allTemporarily disable the vulnerable certificate API endpoint until patching can be completed.
# Consult Trellix documentation for specific API disablement procedures
Network Access Control
allRestrict network access to ESM certificate API endpoints using firewall rules.
# Example: iptables -A INPUT -p tcp --dport [ESM_API_PORT] -j DROP
# Windows: netsh advfirewall firewall add rule name="Block ESM API" dir=in action=block protocol=TCP localport=[ESM_API_PORT]
🧯 If You Can't Patch
- Implement strict network segmentation to isolate ESM systems from critical assets
- Apply additional input validation and sanitization at the application layer
🔍 How to Verify
Check if Vulnerable:
Check ESM version via admin console or command line. Versions below 11.7.0 are vulnerable.Check Version:
On ESM server: esm_version or check via ESM admin interfaceVerify Fix Applied:
Verify ESM version is 11.7.0 or higher and test certificate API functionality.📡 Detection & Monitoring
Log Indicators:
- Unusual certificate API requests
- Suspicious command execution patterns in system logs
- Failed authentication attempts followed by API access
Network Indicators:
- Unusual traffic to ESM certificate API ports
- Suspicious payloads in API requests
SIEM Query:
source="esm_logs" AND (api="certificate" AND (command="*" OR shell="*" OR exec="*"))