CVE-2020-12778
📋 TL;DR
This CVE describes a cross-site scripting (XSS) vulnerability in Combodo iTop where attackers can inject malicious commands due to improper input validation. The vulnerability allows attackers to execute arbitrary JavaScript in the context of victim users' browsers. All users running vulnerable versions of iTop are affected.
💻 Affected Systems
- Combodo iTop
📦 What is this software?
Itop by Combodo
Itop by Combodo
Itop by Combodo
Itop by Combodo
Itop by Combodo
Itop by Combodo
Itop by Combodo
Itop by Combodo
Itop by Combodo
Itop by Combodo
Itop by Combodo
Itop by Combodo
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal session cookies, perform actions as authenticated users, redirect to malicious sites, or install malware on client systems.
Likely Case
Session hijacking, credential theft, or defacement of the iTop interface through malicious script execution.
If Mitigated
With proper input validation and output encoding, the attack would be prevented with no impact.
🎯 Exploit Status
XSS vulnerabilities are commonly exploited and public proof-of-concept exists in advisory.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.7.4 and later
Vendor Advisory: https://github.com/Combodo/iTop/security/advisories/GHSA-8vpf-8vjh-5fcv
Restart Required: Yes
Instructions:
1. Backup your iTop installation and database. 2. Download iTop version 2.7.4 or later from official sources. 3. Follow the iTop upgrade documentation to apply the update. 4. Restart web services.
🔧 Temporary Workarounds
Input Validation Filter
allImplement server-side input validation to sanitize user inputs before processing.
Implement input validation in affected PHP files using htmlspecialchars() or similar functions
Content Security Policy
allImplement Content Security Policy headers to restrict script execution sources.
Add 'Content-Security-Policy: default-src 'self'; script-src 'self'' to web server configuration
🧯 If You Can't Patch
- Implement Web Application Firewall (WAF) rules to block XSS payloads
- Restrict access to iTop interface to trusted networks only
🔍 How to Verify
Check if Vulnerable:
Check iTop version in administration panel or by examining version.php fileCheck Version:
grep 'ITOP_VERSION' /path/to/itop/version.phpVerify Fix Applied:
Verify version is 2.7.4 or later and test input fields with basic XSS payloads📡 Detection & Monitoring
Log Indicators:
- Unusual JavaScript payloads in HTTP request logs
- Multiple failed login attempts followed by script-like requests
Network Indicators:
- HTTP requests containing script tags or JavaScript code in parameters
SIEM Query:
source="web_logs" AND ("<script>" OR "javascript:" OR "onerror=" OR "onload=")