CVE-2024-29970
📋 TL;DR
Fortanix Enclave OS has an interface vulnerability that allows attackers to inject signals, leading to state corruption. This affects systems running Fortanix Enclave OS 3.36.1941-EM, potentially compromising the integrity of enclave operations.
💻 Affected Systems
- Fortanix Enclave OS
⚠️ 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 compromise of enclave security, allowing unauthorized access to protected data and execution of arbitrary code within the enclave environment.
Likely Case
Enclave state corruption leading to denial of service, data integrity issues, or unauthorized information disclosure from within the enclave.
If Mitigated
Limited impact if enclaves are properly isolated and signal handling is restricted, though some state corruption may still occur.
🎯 Exploit Status
Proof of concept available on GitHub demonstrates signal injection technique
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Fortanix support for latest patched version
Vendor Advisory: https://support.fortanix.com/hc/en-us/sections/360012461751-Enclave-OS
Restart Required: Yes
Instructions:
1. Check Fortanix support portal for latest security advisory
2. Download and apply the patched version of Enclave OS
3. Restart all affected enclave instances
4. Verify patch application and enclave functionality
🔧 Temporary Workarounds
Signal Filtering
linuxImplement signal filtering at the host level to block suspicious signal injections
Configure host signal handlers to validate and filter incoming signals to enclaves
Enclave Isolation
linuxIncrease isolation between enclaves to limit potential lateral movement
Implement stricter namespace and cgroup isolation for enclave processes
🧯 If You Can't Patch
- Isolate affected systems from untrusted networks
- Implement strict access controls and monitoring for enclave signal handling
🔍 How to Verify
Check if Vulnerable:
Check Enclave OS version: if running 3.36.1941-EM, system is vulnerableCheck Version:
Check Enclave OS documentation for version verification command specific to your deploymentVerify Fix Applied:
Verify Enclave OS version is updated beyond 3.36.1941-EM and test signal handling functionality📡 Detection & Monitoring
Log Indicators:
- Unexpected signal delivery to enclave processes
- Enclave state corruption errors
- Abnormal enclave termination
Network Indicators:
- Unusual inter-process communication patterns
- Signal injection attempts from unauthorized sources
SIEM Query:
Search for process signal delivery anomalies and enclave error states in system logs