CVE-2025-63402
📋 TL;DR
This vulnerability in HCLTech GRAGON allows remote attackers to execute arbitrary code by exploiting APIs that lack proper request size or number limits. It affects all systems running HCLTech GRAGON versions before 7.6.0. Attackers can potentially take full control of affected systems.
💻 Affected Systems
- HCLTech GRAGON
📦 What is this software?
Dragon by Hcltech
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with remote code execution leading to data theft, ransomware deployment, or lateral movement across the network.
Likely Case
Service disruption, data manipulation, or installation of backdoors for persistent access.
If Mitigated
Limited impact with proper network segmentation and API rate limiting in place.
🎯 Exploit Status
The vulnerability description suggests exploitation is straightforward via API requests without authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 7.6.0
Vendor Advisory: https://excalibur-hcl.my.salesforce.com/sfc/p/#U0000000YO14/a/Pf000003dyVd/ckzaFpdm68dwd1nWqgtLfXHp3Pim_YwLUI4WcRB__Ng
Restart Required: Yes
Instructions:
1. Download HCLTech GRAGON version 7.6.0 from official HCL sources. 2. Backup current configuration and data. 3. Stop the GRAGON service. 4. Install the updated version. 5. Restart the service. 6. Verify functionality.
🔧 Temporary Workarounds
Implement API Rate Limiting
allConfigure web application firewall or reverse proxy to limit request size and rate for GRAGON APIs.
Network Segmentation
allRestrict network access to GRAGON APIs to only trusted internal networks.
🧯 If You Can't Patch
- Isolate the GRAGON system from internet access and restrict to internal network only.
- Implement strict API monitoring and alerting for abnormal request patterns.
🔍 How to Verify
Check if Vulnerable:
Check the GRAGON version via admin interface or configuration files. If version is below 7.6.0, the system is vulnerable.Check Version:
Check GRAGON admin console or configuration files for version information.Verify Fix Applied:
Confirm the installed version is 7.6.0 or higher through the admin interface or version command.📡 Detection & Monitoring
Log Indicators:
- Unusually large API requests
- High frequency of API calls from single sources
- Error logs showing request size limit violations
Network Indicators:
- Abnormal traffic patterns to GRAGON API endpoints
- Large payloads sent to GRAGON services
SIEM Query:
source="gragon" AND (request_size>1000000 OR request_count>1000)