Sensitive data exposure via unvalidated bootloader input
Published May 9, 2023 · Updated Aug 4, 2024
Insufficient input validation in AMD Ryzen and Athlon processor bootloaders allows attackers to expose sensitive data to the SMU. The ASP bootloader accepts unvalidated input from a Uapp or ABL and transfers sensitive information to the SMU when coerced. Exploitation requires control of a Uapp or ABL; AMD reports resulting confidentiality and integrity loss but does not disclose the specific input or exposed data.
Summary
What happened
Insufficient input validation in AMD Ryzen and Athlon processor bootloaders allows attackers to expose sensitive data to the SMU. The ASP bootloader accepts unvalidated input from a Uapp or ABL and transfers sensitive information to the SMU when coerced. Exploitation requires control of a Uapp or ABL; AMD reports resulting confidentiality and integrity loss but does not disclose the specific input or exposed data.
The record
- CVE
- CVE-2021-46754
- Published
- May 9, 2023
- Updated
- Aug 4, 2024
- Vendor
- AMD
- Product
- Ryzen 5000 Series Mobile Processors with Radeon Graphics (Lucienne)
- Classifications
- CWE-20
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- May 9, 2023CVE 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=various
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What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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