CVE-2023-45745
📋 TL;DR
This vulnerability in Intel TDX module software allows a privileged user on a local system to potentially escalate privileges due to improper input validation. It affects systems using Intel TDX technology with vulnerable software versions. The attacker must already have local privileged access to exploit this flaw.
💻 Affected Systems
- Intel TDX Module
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
A privileged attacker could gain higher-level system privileges, potentially compromising the entire host system and accessing protected memory regions.
Likely Case
A malicious administrator or compromised privileged account could elevate privileges to bypass security boundaries within the TDX environment.
If Mitigated
With proper access controls and monitoring, impact is limited to systems where attackers already have privileged access.
🎯 Exploit Status
Exploitation requires local privileged access and knowledge of TDX internals. No public exploits known at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.5.05.46.698 or later
Vendor Advisory: https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01036.html
Restart Required: Yes
Instructions:
1. Check current TDX module version. 2. Download updated TDX module from Intel. 3. Install update following Intel documentation. 4. Reboot system to load new module.
🔧 Temporary Workarounds
Disable TDX
linuxTemporarily disable Intel TDX functionality if not required
echo 'intel_iommu=off' >> /etc/default/grub
update-grub
reboot
🧯 If You Can't Patch
- Restrict local privileged access to essential personnel only
- Implement strict monitoring of privileged user activities and system calls
🔍 How to Verify
Check if Vulnerable:
Check TDX module version: dmesg | grep -i tdx or check /sys/module/tdx_module/versionCheck Version:
dmesg | grep 'TDX module' | grep -o 'version [0-9.]*'Verify Fix Applied:
Verify version is 1.5.05.46.698 or higher after update📡 Detection & Monitoring
Log Indicators:
- Unusual TDX module loading/unloading
- Suspicious privileged process behavior
- Unexpected system calls related to TDX
Network Indicators:
- Not applicable - local-only vulnerability
SIEM Query:
process where (parent_process_name contains 'tdx' OR process_name contains 'tdx') AND user_id < 1000