CVE-2020-7293
📋 TL;DR
This vulnerability allows authenticated users with low privileges in McAfee Web Gateway to change the system's root password due to improper access controls. Attackers with basic user access can gain full administrative control. Affects all MWG deployments with vulnerable versions.
💻 Affected Systems
- McAfee Web Gateway (MWG)
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise where attackers gain root access, can disable security controls, intercept all traffic, and establish persistent backdoors.
Likely Case
Privileged attackers or compromised low-privilege accounts escalate to root, enabling traffic manipulation, credential theft, and lateral movement.
If Mitigated
With proper access controls and monitoring, impact limited to detection of unauthorized password change attempts.
🎯 Exploit Status
Exploitation requires authenticated access but is straightforward through the web interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 9.2.1 or later
Vendor Advisory: https://kc.mcafee.com/corporate/index?page=content&id=SB10323
Restart Required: Yes
Instructions:
1. Backup current configuration. 2. Download MWG 9.2.1 or later from McAfee support portal. 3. Apply update through web interface or CLI. 4. Restart system as prompted. 5. Verify version shows 9.2.1 or higher.
🔧 Temporary Workarounds
Restrict User Access
allLimit user accounts to only trusted administrators and review all existing accounts.
Network Segmentation
allRestrict access to MWG web interface to only trusted management networks.
🧯 If You Can't Patch
- Implement strict access controls and monitor all user account activities
- Disable unnecessary user accounts and implement multi-factor authentication
🔍 How to Verify
Check if Vulnerable:
Check MWG version in web interface: System > About. If version is below 9.2.1, system is vulnerable.Check Version:
ssh admin@mwg-host 'show version' or check web interface System > AboutVerify Fix Applied:
After patching, verify version shows 9.2.1 or higher in System > About. Test that low-privilege users cannot access password change functions.📡 Detection & Monitoring
Log Indicators:
- Unauthorized password change attempts
- User privilege escalation events
- Root password modification logs
Network Indicators:
- Unusual authentication patterns to web interface
- Traffic from non-admin users to administrative endpoints
SIEM Query:
source="mwg-logs" AND (event_type="password_change" OR event_type="privilege_escalation") AND user_role!="admin"