CVE-2025-15564
📋 TL;DR
This vulnerability in Mapnik up to version 4.2.0 allows local attackers to trigger a divide-by-zero error in the mapnik::detail::mod operator. This could cause denial of service by crashing the application. Only users running Mapnik with local access are affected.
💻 Affected Systems
- Mapnik
📦 What is this software?
Mapnik by Mapnik
⚠️ Risk & Real-World Impact
Worst Case
Application crash leading to denial of service for Mapnik-dependent services, potentially disrupting map rendering workflows.
Likely Case
Local user causes Mapnik process to crash, requiring restart of affected services.
If Mitigated
Minimal impact with proper privilege separation and monitoring in place.
🎯 Exploit Status
Exploit requires local access and knowledge of triggering the vulnerable function.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
No official patch available. Monitor Mapnik repository for updates. Consider upgrading to future versions when fix is released.
🔧 Temporary Workarounds
Restrict local access
allLimit local user access to systems running Mapnik to trusted users only.
Implement process monitoring
allMonitor Mapnik processes for crashes and implement automatic restart mechanisms.
🧯 If You Can't Patch
- Implement strict access controls to limit local users who can interact with Mapnik processes
- Deploy monitoring and alerting for Mapnik process crashes with automated recovery procedures
🔍 How to Verify
Check if Vulnerable:
Check Mapnik version: mapnik-config --version. If version is 4.2.0 or earlier, system is vulnerable.Check Version:
mapnik-config --versionVerify Fix Applied:
When patch is available, verify version is greater than 4.2.0 using mapnik-config --version.📡 Detection & Monitoring
Log Indicators:
- Mapnik process crashes
- Divide-by-zero errors in application logs
- SIGFPE signals
Network Indicators:
- None - local exploit only
SIEM Query:
Process:Name="mapnik" AND EventID="1000" OR ExceptionCode="0xc0000094"