CVE-2023-40271
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
1Exploited in Wild
-Decision
Descriptions
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.
En Trusted Firmware-M hasta TF-Mv1.8.0, para plataformas que integran el acelerador CryptoCell, cuando se selecciona la Interfaz del software CryptoCell PSA Driver y se utiliza el algoritmo Cifrado Autenticado con Datos Asociados Chacha20-Poly1305, con la verificación de una función single-part (definida durante la fase de configuración en tiempo de compilación) implementada con una función dedicada (es decir, que no depende del uso de funciones multipart), la comparación del búfer de meoria durante la verificación de la etiqueta de autenticación no ocurre en los 16 bytes completos sino solo en los primeros 4 bytes, lo que genera la posibilidad de que los payloads no autenticados puedan identificarse como auténticas. Esto afecta a TF-Mv1.6.0, TF-Mv1.6.1, TF-Mv1.7.0 y TF-Mv1.8.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2023-08-11 CVE Reserved
- 2023-09-08 CVE Published
- 2024-08-02 CVE Updated
- 2024-08-02 First Exploit
- 2024-09-14 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
CWE
- CWE-697: Incorrect Comparison
CAPEC
References (2)
| URL | Tag | Source |
|---|---|---|
| https://tf-m-user-guide.trustedfirmware.org/releases/index.html | Release Notes |
| URL | Date | SRC |
|---|---|---|
| https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/tree/docs/security/security_advisories/cc3xx_partial_tag_compare_on_chacha20_poly1305.rst | 2024-08-02 |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Arm Search vendor "Arm" | Trusted Firmware-m Search vendor "Arm" for product "Trusted Firmware-m" | 1.6.0 Search vendor "Arm" for product "Trusted Firmware-m" and version "1.6.0" | - |
Affected
| ||||||
| Arm Search vendor "Arm" | Trusted Firmware-m Search vendor "Arm" for product "Trusted Firmware-m" | 1.6.1 Search vendor "Arm" for product "Trusted Firmware-m" and version "1.6.1" | - |
Affected
| ||||||
| Arm Search vendor "Arm" | Trusted Firmware-m Search vendor "Arm" for product "Trusted Firmware-m" | 1.7.0 Search vendor "Arm" for product "Trusted Firmware-m" and version "1.7.0" | - |
Affected
| ||||||
| Arm Search vendor "Arm" | Trusted Firmware-m Search vendor "Arm" for product "Trusted Firmware-m" | 1.8.0 Search vendor "Arm" for product "Trusted Firmware-m" and version "1.8.0" | - |
Affected
| ||||||