CVE-2021-40327
Trusted Firmware-M (TF-M) Authorization Bypass
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.
INFO
Published Date :
Jan. 13, 2022, 4:15 p.m.
Last Modified :
Nov. 21, 2024, 6:23 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
2.2
Affected Products
The following products are affected by CVE-2021-40327
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-40327.
| URL | Resource |
|---|---|
| https://developer.arm.com/support/arm-security-updates | Third Party Advisory |
| https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/ | Patch Vendor Advisory |
| https://tf-m-user-guide.trustedfirmware.org/docs/security/security_advisories/profile_small_key_id_encoding_vulnerability.html | Patch Vendor Advisory |
| https://developer.arm.com/support/arm-security-updates | Third Party Advisory |
| https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/ | Patch Vendor Advisory |
| https://tf-m-user-guide.trustedfirmware.org/docs/security/security_advisories/profile_small_key_id_encoding_vulnerability.html | Patch Vendor Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-40327 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-40327 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://developer.arm.com/support/arm-security-updates Added Reference https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/ Added Reference https://tf-m-user-guide.trustedfirmware.org/docs/security/security_advisories/profile_small_key_id_encoding_vulnerability.html -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Jan. 25, 2022
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:H/Au:N/C:P/I:N/A:N) Added CVSS V3.1 NIST AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N Changed Reference Type https://developer.arm.com/support/arm-security-updates No Types Assigned https://developer.arm.com/support/arm-security-updates Third Party Advisory Changed Reference Type https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/ No Types Assigned https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/ Patch, Vendor Advisory Changed Reference Type https://tf-m-user-guide.trustedfirmware.org/docs/security/security_advisories/profile_small_key_id_encoding_vulnerability.html No Types Assigned https://tf-m-user-guide.trustedfirmware.org/docs/security/security_advisories/profile_small_key_id_encoding_vulnerability.html Patch, Vendor Advisory Added CWE NIST CWE-862 Added CPE Configuration OR *cpe:2.3:a:trustedfirmware:trusted_firmware-m:1.4.0:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-40327 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-40327
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.17 }} -0.07%
score
0.53698
percentile