CVE-2024-45157: mbed tls — Fix

Description

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.

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CVSS v3.1 Score

5.1

MEDIUM

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness Type (CWE)

CWE-696 CWE-696

Affected Products

Vendor	Product	Versions
arm	mbed_tls	2.26.0 — 2.28.9
arm	mbed_tls	3.2.0 — 3.6.1

References

Advisories & Patches

https://mbed-tls.readthedocs.io/en/latest/security-advisories/ https://mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-advisory-2024-08-1/

Other References

https://github.com/Mbed-TLS/mbedtls/releases/

Frequently Asked Questions

What is CVE-2024-45157? +

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. It has a CVSS v3.1 base score of 5.1 (MEDIUM).

How severe is CVE-2024-45157? +

CVE-2024-45157 has a CVSS v3.1 score of 5.1 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-45157? +

CVE-2024-45157 affects products from arm, specifically: mbed_tls. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-45157? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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