CVE-2021-40327

EUVD-2021-27507 · Published Jan 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.

Technologies

Trustedfirmware Trusted Firmware-M

Weaknesses

CWE-862

CVSS scores

v3.15.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
v2.02.6AV:N/AC:H/Au:N/C:P/I:N/A:N

MITRE ATT&CK

Inferred

Where this vulnerability fits in an attack

ReconImpact

Initial Access Persistence Stealth Defense Impairment Credential Access

T1190Exploit Public-Facing Application T1211Exploitation for Stealth T1542.002Component Firmware T1556Modify Authentication Process

References

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

Potentially impacted assets

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