CVE-2024-55064
📋 TL;DR
Multiple cross-site scripting (XSS) vulnerabilities in EasyVirt DC NetScope allow remote attackers to inject malicious JavaScript or HTML code through various parameters. This affects users of EasyVirt DC NetScope version 8.6.4 and earlier. Attackers could execute arbitrary scripts in victims' browsers when they interact with vulnerable pages.
💻 Affected Systems
- EasyVirt DC NetScope
📦 What is this software?
Dc Netscope by Easyvirt
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal session cookies, perform actions as authenticated users, redirect to malicious sites, or install malware on user systems.
Likely Case
Session hijacking, credential theft, or defacement of application pages through script injection.
If Mitigated
Limited impact if input validation and output encoding are properly implemented, though some functionality disruption may occur.
🎯 Exploit Status
Exploitation requires authenticated access to the vulnerable endpoints. The GitHub reference contains technical details about the vulnerabilities.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
1. Monitor vendor for security updates. 2. Apply patches when available. 3. Test in non-production environment first.
🔧 Temporary Workarounds
Input Validation and Output Encoding
allImplement server-side validation and proper output encoding for all user inputs
Web Application Firewall (WAF)
allDeploy WAF with XSS protection rules to filter malicious inputs
🧯 If You Can't Patch
- Restrict network access to the application to trusted users only
- Implement Content Security Policy (CSP) headers to limit script execution
🔍 How to Verify
Check if Vulnerable:
Test the vulnerable endpoints (/smtp/update, /proxy/ntp/change, /process_new_vcenter) with XSS payloads in the identified parametersCheck Version:
Check application version in admin interface or configuration filesVerify Fix Applied:
Verify that user inputs are properly sanitized and encoded in the vulnerable endpoints📡 Detection & Monitoring
Log Indicators:
- Unusual parameter values containing script tags or JavaScript code in HTTP requests
- Multiple failed login attempts followed by suspicious parameter submissions
Network Indicators:
- HTTP requests with script payloads in smtp_server, smtp_account, smtp_password, email_recipients, ntp, dns, or newVcenterAddress parameters
SIEM Query:
http.method:POST AND (http.uri:"/smtp/update" OR http.uri:"/proxy/ntp/change" OR http.uri:"/process_new_vcenter") AND (http.param:*<script* OR http.param:*javascript:* OR http.param:*onerror=*)