CVE-2021-40327

Published: Jan 13, 2022Modified: Jun 5, 2026

5.9

Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Exploitability: 2.2 / Impact: 3.6

Source: NVD

Description

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.

Affected (1)

Products: Trustedfirmware: Trusted Firmware M

Trustedfirmware

1 product

Trusted Firmware M

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Trustedfirmware Trusted Firmware M	Version 1.4.0

Related CWEs

Missing Authorization

The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

References (6)

https://developer.arm.com/support/arm-security-updates

Source: cve@mitre.org

Third Party Advisory

https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/

Source: cve@mitre.org

PatchVendor Advisory

https://tf-m-user-guide.trustedfirmware.org/docs/security/security_advisories/profile_small_key_id_encoding_vulnerability.html

Source: cve@mitre.org

PatchVendor Advisory

https://developer.arm.com/support/arm-security-updates

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/

Source: af854a3a-2127-422b-91ae-364da2661108

PatchVendor Advisory

https://tf-m-user-guide.trustedfirmware.org/docs/security/security_advisories/profile_small_key_id_encoding_vulnerability.html

Source: af854a3a-2127-422b-91ae-364da2661108

PatchVendor Advisory

Timeline

No history available yet.