SMM security-control bypass via malformed SMI input
Published Jun 23, 2022 · Updated Sep 16, 2024
Input validation in Dell Client Platform BIOS before 1.5.0 allows local users to bypass SMM security controls through a crafted SMI. Dell has not disclosed which SMI handler accepts the malicious input or which validation operation is missing. Successful exploitation requires local authenticated access with high privileges and permits security-boundary bypass inside SMM.
Summary
What happened
Input validation in Dell Client Platform BIOS before 1.5.0 allows local users to bypass SMM security controls through a crafted SMI. Dell has not disclosed which SMI handler accepts the malicious input or which validation operation is missing. Successful exploitation requires local authenticated access with high privileges and permits security-boundary bypass inside SMM.
The record
- CVE
- CVE-2022-26863
- Published
- Jun 23, 2022
- Updated
- Sep 16, 2024
- Vendor
- Dell
- Product
- Dell Client Platform BIOS
- Classifications
- CWE-20, T1068
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Jun 23, 2022CVE publishedPublication date reported by the CVE source.
- Sep 16, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=unspecified <1.5.0
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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