CVE-2025-3483
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on MedDream PACS Server installations without authentication by sending specially crafted DICOM files. The flaw exists in DICOM file parsing where improper length validation leads to stack-based buffer overflow. All users running vulnerable versions of MedDream PACS Server are affected.
💻 Affected Systems
- MedDream PACS Server
📦 What is this software?
Pacs Server by Meddream
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with remote code execution as the service account, potentially leading to data theft, system destruction, or lateral movement within the network.
Likely Case
Remote code execution allowing attackers to install malware, exfiltrate sensitive medical data, or disrupt medical imaging services.
If Mitigated
Denial of service or application crash if exploit attempts are blocked by network controls or security software.
🎯 Exploit Status
Buffer overflow vulnerabilities in network services are frequently weaponized. The unauthenticated nature and stack-based overflow make exploitation relatively straightforward for skilled attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific patched version
Vendor Advisory: https://www.zerodayinitiative.com/advisories/ZDI-25-243/
Restart Required: Yes
Instructions:
1. Check vendor advisory for patched version. 2. Backup configuration and data. 3. Apply vendor-provided patch. 4. Restart MedDream PACS Server service. 5. Verify functionality.
🔧 Temporary Workarounds
Network Segmentation
allRestrict access to MedDream PACS Server to trusted medical imaging sources only
DICOM File Validation
allImplement external DICOM file validation/sanitization before processing
🧯 If You Can't Patch
- Implement strict network access controls to limit exposure
- Deploy web application firewall with buffer overflow protection rules
🔍 How to Verify
Check if Vulnerable:
Check MedDream PACS Server version against vendor advisory. Monitor for unexpected DICOM file processing or crashes.Check Version:
Check MedDream administration interface or consult vendor documentation for version checking methodVerify Fix Applied:
Verify patch installation by checking version number and testing DICOM file processing functionality.📡 Detection & Monitoring
Log Indicators:
- Unexpected service crashes
- Large or malformed DICOM file processing attempts
- Unusual network connections to PACS server
Network Indicators:
- Unusual DICOM traffic patterns
- Connection attempts from unexpected sources
- Large DICOM file transfers
SIEM Query:
source="meddream" AND (event_type="crash" OR file_size>100MB) OR dest_port=104 AND src_ip NOT IN trusted_networks