Secure Boot bypass via unrevoked UEFI modules
Published Feb 11, 2020 · Updated Aug 4, 2024
Security feature bypass in Microsoft Windows Secure Boot allows local users to load untrusted software through vulnerable UEFI modules. The forbidden-signature database does not block known vulnerable UEFI modules, so trusted boot accepts code whose signature should be revoked. Administrative privileges and a UEFI device with Secure Boot enabled are required; successful exploitation permits untrusted boot code to run.
Summary
What happened
Security feature bypass in Microsoft Windows Secure Boot allows local users to load untrusted software through vulnerable UEFI modules. The forbidden-signature database does not block known vulnerable UEFI modules, so trusted boot accepts code whose signature should be revoked. Administrative privileges and a UEFI device with Secure Boot enabled are required; successful exploitation permits untrusted boot code to run.
The record
- CVE
- CVE-2020-0689
- Published
- Feb 11, 2020
- Updated
- Aug 4, 2024
- Vendor
- Microsoft
- Product
- Windows 10 Version 1909
- Classifications
- T1542.003
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Feb 11, 2020CVE publishedPublication date reported by the CVE source.
- Aug 4, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=unspecified
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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