CVE-2021-31848
📋 TL;DR
This is a cross-site scripting (XSS) vulnerability in McAfee Data Loss Prevention ePO extension that allows remote attackers to hijack active administrator sessions. Attackers can execute arbitrary JavaScript in the context of a logged-in administrator by tricking them into clicking a malicious link in the case management interface. This affects organizations using McAfee DLP ePO extension prior to version 11.7.100.
💻 Affected Systems
- McAfee Data Loss Prevention ePO extension
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of DLP ePO administrator account leading to data exfiltration, policy manipulation, and lateral movement within the network.
Likely Case
Session hijacking allowing unauthorized access to sensitive DLP data and administrative functions.
If Mitigated
Limited impact with proper session management and user awareness training.
🎯 Exploit Status
Exploitation requires social engineering to get administrator to click malicious link, but XSS payloads are simple to craft.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 11.7.100
Vendor Advisory: https://kc.mcafee.com/corporate/index?page=content&id=SB10371
Restart Required: Yes
Instructions:
1. Download McAfee DLP ePO extension version 11.7.100 or later from official McAfee portal. 2. Deploy through ePO console to affected systems. 3. Restart ePO services after deployment.
🔧 Temporary Workarounds
Input Validation Enhancement
allImplement additional input validation for case management fields
Customize DLP ePO extension to sanitize all user inputs in case management
Content Security Policy
allImplement strict CSP headers to prevent XSS execution
Add 'Content-Security-Policy' header with script-src restrictions
🧯 If You Can't Patch
- Restrict access to DLP ePO console to trusted networks only
- Implement user awareness training about phishing and suspicious links in administrative interfaces
🔍 How to Verify
Check if Vulnerable:
Check DLP ePO extension version in ePO console under System Tree > Product DetailsCheck Version:
Check ePO console or run: Get-ItemProperty -Path 'HKLM:\SOFTWARE\McAfee\DLPePO' -Name 'Version' (Windows)Verify Fix Applied:
Verify version shows 11.7.100 or higher in ePO console📡 Detection & Monitoring
Log Indicators:
- Unusual administrator login patterns
- Multiple failed login attempts followed by successful login from different IP
Network Indicators:
- Suspicious outbound connections from DLP server
- Unusual traffic patterns to/from DLP console
SIEM Query:
source="DLP_ePO_logs" AND (event_type="admin_login" AND src_ip!=expected_ip) OR (event_type="case_management" AND contains(url,"javascript:"))