CVE-2021-40327 Information

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.

CVSS Vector

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

Reference

https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/ https://developer.arm.com/support/arm-security-updates https://tf-m-user-guide.trustedfirmware.org/docs/security/security_advisories/profile_small_key_id_encoding_vulnerability.html

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

5.9