CVE-2025-20025
📋 TL;DR
This vulnerability in Intel's TinyCBOR libraries allows authenticated users to trigger uncontrolled recursion, potentially causing denial of service through local access. It affects systems using vulnerable versions of Intel's TinyCBOR library before 0.6.1. The attack requires local authenticated access to the system.
💻 Affected Systems
- Intel TinyCBOR library
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete service disruption of applications using the vulnerable TinyCBOR library, potentially affecting multiple services on the system.
Likely Case
Application crashes or hangs when processing malicious CBOR data, requiring service restarts.
If Mitigated
Minimal impact with proper access controls limiting local authenticated users and monitoring for abnormal resource usage.
🎯 Exploit Status
Requires authenticated local access and ability to supply malicious CBOR data to vulnerable applications.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.6.1 or later
Vendor Advisory: https://intel.com/content/www/us/en/security-center/advisory/intel-sa-01326.html
Restart Required: No
Instructions:
1. Identify applications using TinyCBOR library. 2. Update TinyCBOR library to version 0.6.1 or later. 3. Rebuild/redeploy affected applications with updated library.
🔧 Temporary Workarounds
Restrict local authenticated access
allLimit which local users can interact with applications using TinyCBOR library
Input validation for CBOR data
allImplement strict input validation and size limits for CBOR data processing
🧯 If You Can't Patch
- Implement strict access controls to limit which local users can supply CBOR data to vulnerable applications
- Monitor system resources and application logs for signs of abnormal recursion or resource exhaustion
🔍 How to Verify
Check if Vulnerable:
Check if applications link against TinyCBOR library version < 0.6.1 using ldd or dependency checking toolsCheck Version:
Check library version in package manager or examine library files for version informationVerify Fix Applied:
Verify TinyCBOR library version is 0.6.1 or later and applications have been rebuilt with updated library📡 Detection & Monitoring
Log Indicators:
- Application crashes with stack overflow errors
- Abnormal recursion in call stacks
- Resource exhaustion warnings
Network Indicators:
- None - local attack only
SIEM Query:
Search for application crashes containing 'stack overflow', 'recursion depth', or 'TinyCBOR' in error messages