Vulnerability Description
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).
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Arm | Mbed Tls | >= 3.2.0, < 3.6.1 |
Related Weaknesses (CWE)
References
- https://github.com/Mbed-TLS/mbedtls/releases/Release Notes
- https://mbed-tls.readthedocs.io/en/latest/security-advisories/Issue Tracking
- https://mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-aVendor Advisory
FAQ
What is CVE-2024-45159?
CVE-2024-45159 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 ...
How severe is CVE-2024-45159?
CVE-2024-45159 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2024-45159?
Check the references section above for vendor advisories and patch information. Affected products include: Arm Mbed Tls.