CVE-2023-51712
📋 TL;DR
This vulnerability in Trusted Firmware-M allows attackers to read sensitive data through the logging subsystem due to insufficient argument verification. It affects systems running Trusted Firmware-M up to version 2.0.0. The issue enables information disclosure from secure firmware components.
💻 Affected Systems
- Trusted Firmware-M
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could extract cryptographic keys, authentication credentials, or other sensitive firmware data, potentially compromising the entire secure execution environment.
Likely Case
Information disclosure of debug data, memory contents, or configuration details that could aid further attacks against the system.
If Mitigated
Limited information leakage if debug logging is disabled or proper access controls prevent exploitation.
🎯 Exploit Status
Exploitation requires access to the logging subsystem interface, which typically requires some level of system access.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.1.0 and later
Vendor Advisory: https://trustedfirmware-m.readthedocs.io/en/latest/security/security_advisories/debug_log_vulnerability.html
Restart Required: Yes
Instructions:
1. Update Trusted Firmware-M to version 2.1.0 or later. 2. Rebuild and reflash firmware. 3. Verify the update was successful.
🔧 Temporary Workarounds
Disable Debug Logging
allDisable debug logging functionality in Trusted Firmware-M configuration
Modify TF-M build configuration to set TFM_PARTITION_LOG_LEVEL=TFM_LOG_LEVEL_NONE
🧯 If You Can't Patch
- Disable debug logging functionality completely
- Restrict access to logging interfaces through access controls
🔍 How to Verify
Check if Vulnerable:
Check TF-M version: if version ≤ 2.0.0 and debug logging is enabled, system is vulnerable.Check Version:
Check firmware version through device management interface or examine firmware binariesVerify Fix Applied:
Verify TF-M version is ≥ 2.1.0 and check that argument verification is implemented in logging functions.📡 Detection & Monitoring
Log Indicators:
- Unusual access patterns to logging functions
- Excessive debug log output containing sensitive data
Network Indicators:
- Not applicable - local firmware vulnerability
SIEM Query:
Not applicable for typical SIEM systems - requires firmware monitoring