An issue was discovered in Mbed TLS before 2.28.9 and 3.x before 3.6.1, in which the user-selected algorithm is not used. Unlike previously documented, enabling MBEDTLS_PSA_HMAC_DRBG_MD_TYPE does not cause the PSA subsystem to use HMAC_DRBG: it uses HMAC_DRBG only when MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG and MBEDTLS_CTR_DRBG_C are disabled.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Mbed_tls | Arm | 2.26.0 (including) | 2.28.9 (excluding) |
| Mbed_tls | Arm | 3.2.0 (including) | 3.6.1 (excluding) |
| Mbedtls | Ubuntu | esm-apps/jammy | * |
| Mbedtls | Ubuntu | esm-apps/noble | * |
| Mbedtls | Ubuntu | focal | * |
| Mbedtls | Ubuntu | jammy | * |
| Mbedtls | Ubuntu | noble | * |
| Mbedtls | Ubuntu | oracular | * |
| Mbedtls | Ubuntu | upstream | * |