CVE-2024-42995
📋 TL;DR
This vulnerability allows low-privileged users in VTiger CRM to bypass authorization checks and disable arbitrary modules via the Migration administrative module. It affects all VTiger CRM installations running version 8.1.0 or earlier. Attackers can disrupt business operations by disabling critical CRM functionality.
💻 Affected Systems
- VTiger CRM
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
An attacker could disable all modules, completely crippling the CRM system and causing business disruption, data loss, and operational downtime.
Likely Case
Attackers disable key modules like Sales, Support, or Inventory, disrupting business workflows and causing productivity loss.
If Mitigated
With proper privilege separation and monitoring, impact is limited to temporary disruption of non-critical modules.
🎯 Exploit Status
Exploitation requires authenticated low-privileged access. The advisory includes technical details that make weaponization straightforward.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 8.2.0 or later
Vendor Advisory: https://www.shielder.com/advisories/vtiger-migration-bac/
Restart Required: No
Instructions:
1. Backup your VTiger installation and database. 2. Download VTiger CRM version 8.2.0 or later from the official website. 3. Follow the official upgrade procedure for your installation method. 4. Verify the Migration module now requires administrative privileges.
🔧 Temporary Workarounds
Restrict Migration Module Access
allManually modify permissions to restrict access to the Migration module to administrators only.
# Edit VTiger permissions configuration
# Location varies by installation - typically in config.inc.php or module-specific permission files
Disable Low-Privileged User Accounts
allTemporarily disable or restrict all non-administrative user accounts until patching is complete.
# Use VTiger admin panel to disable user accounts
# Or modify database directly: UPDATE vtiger_users SET status='Inactive' WHERE is_admin=0
🧯 If You Can't Patch
- Implement strict network segmentation to isolate VTiger CRM from untrusted networks
- Enable detailed logging and monitoring of all Migration module access attempts
🔍 How to Verify
Check if Vulnerable:
Check your VTiger version in the admin panel or via the database: SELECT version FROM vtiger_version; If version <= 8.1.0, you are vulnerable.Check Version:
SELECT version FROM vtiger_version;Verify Fix Applied:
After upgrading, verify version is >= 8.2.0. Test with a low-privileged user account that access to the Migration module is properly denied.📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to /modules/Migration/
- Module disable events from non-admin users
- Permission denied errors for Migration module
Network Indicators:
- HTTP POST requests to Migration endpoints from non-admin IPs
- Unusual module configuration changes
SIEM Query:
source="vtiger_logs" AND (uri="/modules/Migration/" OR module="Migration") AND user_role!="admin"