Secure-memory read and write via unvalidated input
Published Dec 15, 2023 · Updated Sep 26, 2024
Out-of-bounds access in Silicon Labs Gecko SDK before 4.4.0 allows local users to read and write secure memory from non-secure code. A TrustZone library function that brokers communication across the secure boundary accepts an unvalidated input and uses it for out-of-bounds memory access. Exploitation requires code execution in the non-secure region on a device that includes the affected PSA Attestation service.
Summary
What happened
Out-of-bounds access in Silicon Labs Gecko SDK before 4.4.0 allows local users to read and write secure memory from non-secure code. A TrustZone library function that brokers communication across the secure boundary accepts an unvalidated input and uses it for out-of-bounds memory access. Exploitation requires code execution in the non-secure region on a device that includes the affected PSA Attestation service.
The record
- CVE
- CVE-2023-4020
- Published
- Dec 15, 2023
- Updated
- Sep 26, 2024
- Vendor
- Sigma Designs
- Product
- Gecko SDK (GSDK)
- Classifications
- CWE-125, CWE-787, CAPEC-129, T1068
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 15, 2023CVE publishedPublication date reported by the CVE source.
- Sep 26, 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=1.0 <4.4.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
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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