CVE-2023-3398
📋 TL;DR
This CVE describes a Denial of Service vulnerability in the draw.io diagramming software. Attackers can cause the application to crash or become unresponsive by exploiting resource exhaustion. All users running draw.io versions prior to 18.1.3 are affected.
💻 Affected Systems
- draw.io (diagrams.net)
📦 What is this software?
Drawio by Diagrams
⚠️ Risk & Real-World Impact
Worst Case
Complete service disruption making draw.io unavailable for all users, potentially affecting business operations that rely on diagram creation and collaboration.
Likely Case
Application crashes or becomes unresponsive for individual users, requiring restart and causing data loss for unsaved work.
If Mitigated
Minimal impact with proper network segmentation and updated software, though isolated incidents may still occur.
🎯 Exploit Status
Exploitation requires specific conditions to trigger resource exhaustion. No public exploit code available at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 18.1.3 and later
Vendor Advisory: https://github.com/jgraph/drawio/commit/064729fec4262f9373d9fdcafda0be47cd18dd50
Restart Required: Yes
Instructions:
1. Update draw.io to version 18.1.3 or later. 2. For desktop applications: Download latest version from draw.io website. 3. For web deployments: Update to latest container/image. 4. Restart the application/service.
🔧 Temporary Workarounds
Resource Limiting
allImplement resource limits on draw.io processes to prevent complete exhaustion
# For container deployments: docker run --memory=512m --cpus=1 drawio
Network Segmentation
allRestrict network access to draw.io instances to trusted users only
🧯 If You Can't Patch
- Implement strict input validation and sanitization for user-provided content
- Monitor system resources and restart services when resource usage exceeds thresholds
🔍 How to Verify
Check if Vulnerable:
Check draw.io version in application settings or via 'Help > About' menuCheck Version:
# For desktop: Check 'Help > About' menu
# For web: Check browser console or application infoVerify Fix Applied:
Confirm version is 18.1.3 or higher and test with known triggering conditions📡 Detection & Monitoring
Log Indicators:
- Application crashes
- High memory/CPU usage spikes
- Out of memory errors
Network Indicators:
- Unusual traffic patterns to draw.io endpoints
- Multiple connection attempts
SIEM Query:
source="drawio" AND (event="crash" OR memory_usage>90% OR cpu_usage>95%)