Vulnerability 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 Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Trustedfirmware | Trusted Firmware-M | 1.4.0 |
Related Weaknesses (CWE)
References
- https://developer.arm.com/support/arm-security-updatesThird Party Advisory
- https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/PatchVendor Advisory
- https://tf-m-user-guide.trustedfirmware.org/docs/security/security_advisories/prPatchVendor Advisory
- https://developer.arm.com/support/arm-security-updatesThird Party Advisory
- https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/PatchVendor Advisory
- https://tf-m-user-guide.trustedfirmware.org/docs/security/security_advisories/prPatchVendor Advisory
FAQ
What is CVE-2021-40327?
CVE-2021-40327 is a vulnerability with a CVSS score of 5.9 (MEDIUM). 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 exampl...
How severe is CVE-2021-40327?
CVE-2021-40327 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-40327?
Check the references section above for vendor advisories and patch information. Affected products include: Trustedfirmware Trusted Firmware-M.