CVE-2025-2581
📋 TL;DR
An integer underflow vulnerability in xmedcon's DICOM file handler allows remote attackers to potentially cause denial of service or execute arbitrary code by manipulating memory allocation. This affects systems running xmedcon 0.25.0 that process DICOM files from untrusted sources.
💻 Affected Systems
- xmedcon
📦 What is this software?
Xmedcon by Xmedcon Project
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise if the integer underflow enables memory corruption that can be weaponized.
Likely Case
Application crash or denial of service when processing malicious DICOM files, potentially disrupting medical imaging workflows.
If Mitigated
Limited impact with proper network segmentation and file validation controls in place.
🎯 Exploit Status
Integer underflow vulnerabilities require precise manipulation but remote exploitation is confirmed possible.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.25.1
Vendor Advisory: https://xmedcon.sourceforge.io/Main/New
Restart Required: Yes
Instructions:
1. Download xmedcon 0.25.1 from official source. 2. Uninstall vulnerable version. 3. Install patched version. 4. Restart any services using xmedcon.
🔧 Temporary Workarounds
Restrict DICOM file sources
allOnly allow xmedcon to process DICOM files from trusted, internal sources
Network segmentation
allIsolate systems running xmedcon from untrusted networks
🧯 If You Can't Patch
- Implement strict input validation for DICOM files before processing
- Run xmedcon in sandboxed/containerized environment with limited privileges
🔍 How to Verify
Check if Vulnerable:
Check xmedcon version with 'xmedcon --version' or package manager queryCheck Version:
xmedcon --versionVerify Fix Applied:
Confirm version is 0.25.1 or higher and test with known safe DICOM files📡 Detection & Monitoring
Log Indicators:
- Unexpected xmedcon process crashes
- Memory allocation errors in system logs
- Large number of failed DICOM file processing attempts
Network Indicators:
- Unusual DICOM file transfers to systems running xmedcon
- Network connections to xmedcon from untrusted sources
SIEM Query:
process_name:"xmedcon" AND (event_type:crash OR error_message:"malloc" OR error_message:"underflow")