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Lenovo System x Secure Boot Vulnerability

Lenovo internal testing discovered some System x server BIOS/UEFI versions that, when Secure Boot mode is enabled by a system administrator, do not properly authenticate signed code before booting it. As a result, an attacker with physical access to the system could boot unsigned code.
Threat ID:
CC-2360
Category:
Threat Severity:
Low
Threat Vector:
Published:
9 May 2018 12:00 AM
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Summary

Lenovo internal testing discovered some System x server BIOS/UEFI versions that, when Secure Boot mode is enabled by a system administrator, do not properly authenticate signed code before booting it. As a result, an attacker with physical access to the system could boot unsigned code.

Threat details

Lenovo ships these systems with Secure Boot disabled by default, because signed code is relatively new in the data center environment, and standard operator configurations disable signature checking.

Remediation steps

Type Step
Users and administrators are encouraged to visit Lenovo's Security Advisory LEN-20241 and apply the necessary BIOS/UEFI update.

Last edited: 17 February 2020 12:47 pm