CVE-2023-46815
📋 TL;DR
SugarCRM has an unrestricted file upload vulnerability in the Notes module that allows authenticated users to upload malicious PHP files. This affects SugarCRM 12 before 12.0.4 and 13 before 13.0.2, enabling remote code execution on the server.
💻 Affected Systems
- SugarCRM
📦 What is this software?
Sugarcrm by Sugarcrm
Sugarcrm by Sugarcrm
Sugarcrm by Sugarcrm
Sugarcrm by Sugarcrm
Sugarcrm by Sugarcrm
Sugarcrm by Sugarcrm
Sugarcrm by Sugarcrm
Sugarcrm by Sugarcrm
Sugarcrm by Sugarcrm
⚠️ Risk & Real-World Impact
Worst Case
Full server compromise leading to data theft, ransomware deployment, or complete system takeover via remote code execution.
Likely Case
Attacker gains shell access to the server, installs backdoors, steals sensitive CRM data, and pivots to internal networks.
If Mitigated
Attack contained to web server process with limited impact if proper file system permissions and web application firewalls are configured.
🎯 Exploit Status
Exploitation requires authenticated user credentials but is straightforward once access is obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: SugarCRM 12.0.4 or 13.0.2
Vendor Advisory: https://support.sugarcrm.com/resources/security/sugarcrm-sa-2023-011/
Restart Required: No
Instructions:
1. Backup your SugarCRM instance and database. 2. Apply the official patch by upgrading to SugarCRM 12.0.4 or 13.0.2. 3. Verify the upgrade completed successfully. 4. Test critical functionality.
🔧 Temporary Workarounds
Restrict file upload extensions
allConfigure web server or application to block PHP file uploads in the Notes module
# Configure .htaccess for Apache:
<FilesMatch "\.(php|php3|php4|php5|phtml|phar)$">
Order Allow,Deny
Deny from all
</FilesMatch>
# Configure nginx location block:
location ~ \.php$ {
deny all;
}
Disable Notes module uploads
allTemporarily disable file upload functionality in the Notes module
# Edit SugarCRM configuration to remove upload capability from Notes module
🧯 If You Can't Patch
- Implement strict file upload validation at the web application firewall level
- Restrict file system permissions so uploaded files cannot be executed as PHP
🔍 How to Verify
Check if Vulnerable:
Check SugarCRM version in Admin > System Settings. If version is 12.x < 12.0.4 or 13.x < 13.0.2, system is vulnerable.Check Version:
# Check via CLI if accessible:
grep 'sugar_version' config.php | head -1Verify Fix Applied:
After patching, verify version shows 12.0.4 or 13.0.2 in Admin > System Settings. Test file upload functionality in Notes module.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to Notes module
- PHP file uploads with suspicious names
- Multiple failed upload attempts followed by successful PHP upload
Network Indicators:
- HTTP POST requests to Notes module with file uploads
- Subsequent requests to uploaded PHP files
SIEM Query:
source="web_logs" (uri_path="/index.php?module=Notes*" AND method="POST" AND file_extension="php")