Vulnerability Description
In Trusted Firmware-M through TF-Mv1.8.0, for platforms that integrate the CryptoCell accelerator, when the CryptoCell PSA Driver software Interface is selected, and the Authenticated Encryption with Associated Data Chacha20-Poly1305 algorithm is used, with the single-part verification function (defined during the build-time configuration phase) implemented with a dedicated function (i.e., not relying on usage of multipart functions), the buffer comparison during the verification of the authentication tag does not happen on the full 16 bytes but just on the first 4 bytes, thus leading to the possibility that unauthenticated payloads might be identified as authentic. This affects TF-Mv1.6.0, TF-Mv1.6.1, TF-Mv1.7.0, and TF-Mv1.8.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Arm | Trusted Firmware-M | 1.6.0 |
Related Weaknesses (CWE)
References
- https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/tree/docs/security/sExploitMitigationTechnical Description
- https://tf-m-user-guide.trustedfirmware.org/releases/index.htmlRelease Notes
- https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/tree/docs/security/sExploitMitigationTechnical Description
- https://tf-m-user-guide.trustedfirmware.org/releases/index.htmlRelease Notes
FAQ
What is CVE-2023-40271?
CVE-2023-40271 is a vulnerability with a CVSS score of 7.5 (HIGH). In Trusted Firmware-M through TF-Mv1.8.0, for platforms that integrate the CryptoCell accelerator, when the CryptoCell PSA Driver software Interface is selected, and the Authenticated Encryption with ...
How severe is CVE-2023-40271?
CVE-2023-40271 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-40271?
Check the references section above for vendor advisories and patch information. Affected products include: Arm Trusted Firmware-M.