mbed TLS 3.6.0 TLS Client Authentication mbedtls_ssl_get_verify_result return value

Summaryinfo

A vulnerability, which was classified as problematic, has been found in mbed TLS 3.6.0. This affects the function mbedtls_ssl_get_verify_result of the component TLS Client Authentication Handler. Performing a manipulation results in return value. This vulnerability is cataloged as CVE-2024-45159. It is possible to initiate the attack remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in mbed TLS 3.6.0. This affects the function mbedtls_ssl_get_verify_result of the component TLS Client Authentication Handler. The manipulation with an unknown input leads to a return value vulnerability. CWE is classifying the issue as CWE-252. The product does not check the return value from a method or function, which can prevent it from detecting unexpected states and conditions. The impact remains unknown. The summary by CVE is:

An issue was discovered in Mbed TLS 3.x before 3.6.1. With TLS 1.3, when a server enables optional authentication of the client, if the client-provided certificate does not have appropriate values in if keyUsage or extKeyUsage extensions, then the return value of mbedtls_ssl_get_verify_result() would incorrectly have the MBEDTLS_X509_BADCERT_KEY_USAGE and MBEDTLS_X509_BADCERT_KEY_USAGE bits clear. As a result, an attacker that had a certificate valid for uses other than TLS client authentication would nonetheless be able to use it for TLS client authentication. Only TLS 1.3 servers were affected, and only with optional authentication (with required authentication, the handshake would be aborted with a fatal alert).

The advisory is shared at mbed-tls.readthedocs.io. This vulnerability is uniquely identified as CVE-2024-45159 since 08/22/2024. The exploitability is told to be difficult. It is possible to initiate the attack remotely. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 211930 (CBL Mariner 2.0 Security Update: hvloader (CVE-2024-45159)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.6.1 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (211930) and EUVD (EUVD-2024-41339). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Name

• mbed TLS

Version

• 3.6.0

CPE 2.3info

• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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