CVE-2020-12355: intel trusted_execution_engine_firmware Authentication Bypass by Capture-replay

Vulnerability summary

CVE-2020-12355 is a medium (CVSS 6.8) Authentication Bypass by Capture-replay vulnerability in intel trusted_execution_engine_firmware. EPSS estimates a 0.40% chance of exploitation in the next 30 days, higher than 33.5% of scored vulnerabilities.

Timeline

1. 12-11-2020
   PublishedVulnerability first disclosed.
2. 04-11-2025
   Last modifiedVulnerability information updated.

Description

Authentication bypass by capture-replay in RPMB protocol message authentication subsystem in Intel(R) TXE versions before 4.0.30 may allow an unauthenticated user to potentially enable escalation of privilege via physical access.

• CWE-294Authentication Bypass by Capture-replayA capture-replay flaw exists when the design of the product makes it possible for a malicious user to sniff network traffic and bypass authentication by replaying it to the server in question to the same effect as the original message (or with minor changes).