CVE-2025-66838
📋 TL;DR
This vulnerability allows attackers to upload files at an unrestricted rate in Aris software, potentially causing resource exhaustion like disk space depletion or server performance degradation. It affects Aris v10.0.23.0.3587512 and earlier versions. Organizations using these vulnerable versions are at risk.
💻 Affected Systems
- Software AG Aris
📦 What is this software?
Aris by Softwareag
⚠️ Risk & Real-World Impact
Worst Case
Complete denial of service through disk space exhaustion, server crash, or significant performance degradation affecting all users.
Likely Case
Degraded system performance, temporary service disruption, and potential data loss from disk space exhaustion.
If Mitigated
Minimal impact with proper rate limiting and monitoring in place.
🎯 Exploit Status
Exploitation requires user access but is technically simple - just rapid file uploads. Public proof-of-concept exists on GitHub.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v10.0.24 or later (check vendor advisory)
Vendor Advisory: https://www.softwareag.com/
Restart Required: Yes
Instructions:
1. Check current Aris version. 2. Download and apply the latest patch from Software AG. 3. Restart Aris services. 4. Verify the fix is applied.
🔧 Temporary Workarounds
Implement Web Application Firewall (WAF) Rules
allConfigure WAF to limit file upload requests per user/IP
Configure Reverse Proxy Rate Limiting
linuxSet up rate limiting at the reverse proxy/load balancer level
# Example nginx rate limiting:
limit_req_zone $binary_remote_addr zone=upload:10m rate=10r/s;
limit_req zone=upload burst=20 nodelay;
🧯 If You Can't Patch
- Implement network-level rate limiting for file upload endpoints
- Monitor disk usage and set up alerts for rapid storage consumption
🔍 How to Verify
Check if Vulnerable:
Check if Aris version is v10.0.23.0.3587512 or earlier and file upload functionality exists without rate limiting.Check Version:
Check Aris administration console or configuration files for version information.Verify Fix Applied:
Test file upload functionality with rapid requests - should be rate limited or rejected after threshold.📡 Detection & Monitoring
Log Indicators:
- Rapid succession of file upload requests from single user/IP
- Disk space alerts
- High CPU/memory usage during uploads
Network Indicators:
- High volume of POST requests to upload endpoints
- Unusual traffic patterns to file upload URLs
SIEM Query:
source="aris_logs" AND (event="file_upload" OR url_path="/upload") | stats count by src_ip, user | where count > 100