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CVE-2021-40327

Date: January 13, 2022

Trusted Firmware-M (TF-M) 1.4.0, when Profile Small is used, has incorrect access control. NSPE can access a secure key (held by the Crypto service) based solely on knowledge of its key ID. For example, there is no authorization check associated with the relationship between a caller and a key owner.

Severity Score

Related Resources (6)

https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/
https://tf-m-user-guide.trustedfirmware.org/docs/security/security_advisories/profile_small_key_id_encoding_vulnerability.html
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-40327
https://developer.arm.com/support/arm-security-updates
https://nvd.nist.gov/vuln/detail/CVE-2021-40327
https://www.mend.io/vulnerability-database/CVE-2021-40327

Severity Score

Weakness Type (CWE)

Missing Authorization

CWE-862

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): NONE
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): HIGH
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): NONE
Additional information:

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