CVE-2025-12495
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code by tricking users into opening malicious EXR image files. It affects systems running vulnerable versions of Academy Software Foundation OpenEXR library. Attackers can achieve remote code execution in the context of the current process.
💻 Affected Systems
- Academy Software Foundation OpenEXR
📦 What is this software?
Openexr by Openexr
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining the same privileges as the user opening the malicious file, potentially leading to data theft, ransomware deployment, or persistent backdoor installation.
Likely Case
Local privilege escalation or application compromise when users open malicious EXR files from untrusted sources, potentially leading to data exfiltration or lateral movement.
If Mitigated
Application crash or denial of service if exploit fails, with limited impact due to proper security controls and user awareness.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file) but the vulnerability itself is unauthenticated. Heap overflow to RCE is a common exploitation path.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific patched version
Vendor Advisory: https://github.com/AcademySoftwareFoundation/openexr/security/advisories
Restart Required: Yes
Instructions:
1. Check current OpenEXR version
2. Visit GitHub security advisory page
3. Download and install patched version
4. Restart affected applications
🔧 Temporary Workarounds
File Type Restriction
allBlock or restrict EXR file processing in vulnerable applications
Application Sandboxing
allRun OpenEXR applications in sandboxed/isolated environments
🧯 If You Can't Patch
- Implement strict file validation policies to block untrusted EXR files
- Use application allowlisting to prevent unauthorized EXR processing applications
🔍 How to Verify
Check if Vulnerable:
Check OpenEXR library version against vendor advisoryCheck Version:
exrheader --version or check library version in application dependenciesVerify Fix Applied:
Verify OpenEXR version is updated to patched release📡 Detection & Monitoring
Log Indicators:
- Application crashes when processing EXR files
- Unusual process spawning from media applications
- Memory access violation errors
Network Indicators:
- Downloads of EXR files from untrusted sources
- Unusual outbound connections from media processing applications
SIEM Query:
Process creation where parent process is media application AND command line contains .exr file extension