Administrator modification of UEFI variables
Published Jun 23, 2023 · Updated Nov 8, 2024
Improper input validation in Dell Client Platform BIOS allows local users with administrator privileges to modify a UEFI variable. Dell has not disclosed the affected code path, the variable, or which input is validated incorrectly before the firmware accepts the write. Exploitation requires local authenticated administrator access and can alter firmware configuration and degrade availability.
Summary
What happened
Improper input validation in Dell Client Platform BIOS allows local users with administrator privileges to modify a UEFI variable. Dell has not disclosed the affected code path, the variable, or which input is validated incorrectly before the firmware accepts the write. Exploitation requires local authenticated administrator access and can alter firmware configuration and degrade availability.
The record
- CVE
- CVE-2023-28039
- Published
- Jun 23, 2023
- Updated
- Nov 8, 2024
- Vendor
- Dell
- Product
- Dell Client Platform BIOS
- Classifications
- CWE-20
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Jun 23, 2023CVE publishedPublication date reported by the CVE source.
- Nov 8, 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=All Versions
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
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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