Firmware memory disclosure via reused NVRAM length
Published Jun 23, 2023 · Updated Nov 8, 2024
Information disclosure in Dell Client Platform BIOS allows local users with administrator privileges to read stack or global memory. In the BoardInitDxe module, GetVariable overwrites DataSize with an attacker-controlled NVRAM length, and SetVariable reuses that length to copy adjacent memory into RebootCounter10GLom. Exploitation requires high local access; the direct result is disclosure of firmware memory, while code execution or persistence requires chaining another flaw.
Summary
What happened
Information disclosure in Dell Client Platform BIOS allows local users with administrator privileges to read stack or global memory. In the BoardInitDxe module, GetVariable overwrites DataSize with an attacker-controlled NVRAM length, and SetVariable reuses that length to copy adjacent memory into RebootCounter10GLom. Exploitation requires high local access; the direct result is disclosure of firmware memory, while code execution or persistence requires chaining another flaw.
The record
- CVE
- CVE-2023-28061
- Published
- Jun 23, 2023
- Updated
- Nov 8, 2024
- Vendor
- Dell
- Product
- Dell Client Platform BIOS
- Classifications
- CWE-20, T1005
- 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
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- Affected versionversion=All Versions
What conditions does exploitation require?
What is affected?
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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