Critical severity · published Dec 15, 2023
CVE-2023-4020
Unvalidated input in Silicon Labs PSA Attestation service leads to secure memory access from non-secure memory
9.1
CVSS
0.6%
EPSS
No
On KEV
Description
An unvalidated input in a library function responsible for communicating between secure and non-secure memory in Silicon Labs TrustZone implementation allows reading/writing of memory in the secure region of memory from the non-secure region of memory.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 47% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GS
GSDK · silabs.com
1.0 before 4.4.0 · source: vendor
GS
Gecko Software Development Kit · Silabs
1.0.0 before 4.4.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-4020
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-4020
Permissions Required
https://community.silabs.com/069Vm0000004b95IAA
Release Notes
https://github.com/SiliconLabs/gecko_sdk/releases
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