CVE-2024-45159

published 2024-09-05

CVE-2024-45159: 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…

Priority P3 58 critical 9.8 CVSS 3.1

AV N AC L PR N UI N S U C H I H A H

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).

Affected

8 ranges

Vendor	Product	Version range	Fixed in
debian	mbedtls	—	—
mbed	mbedtls	>= 0 < 3.6.1-r0	3.6.1-r0
mbed	mbedtls	>= 0 < 3.6.1-r0	3.6.1-r0
mbed	mbedtls	>= 0 < 3.6.1-r0	3.6.1-r0
mbed	mbedtls	>= 0 < 3.6.1-r0	3.6.1-r0
msrc	cbl_mariner_2.0_arm	—	—
msrc	cbl_mariner_2.0_x64	—	—
trustedfirmware	mbed_tls	>= 3.2.0 < 3.6.1	3.6.1

CVSS provenance

nvd v3.1 9.8 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

osv 9.8 CRITICAL

vendor_debian 9.8 LOW

vendor_msrc 9.8 CRITICAL

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CWE-295