CVE Vulnerabilities

CVE-2020-36425

Improper Certificate Validation

Published: Jul 19, 2021 | Modified: Jan 11, 2023
CVSS 3.x
5.3
MEDIUM
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS 2.x
4.3 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:N
RedHat/V2
RedHat/V3
Ubuntu

An issue was discovered in Arm Mbed TLS before 2.24.0. It incorrectly uses a revocationDate check when deciding whether to honor certificate revocation via a CRL. In some situations, an attacker can exploit this by changing the local clock.

Weakness

The product does not validate, or incorrectly validates, a certificate.

Affected Software

Name Vendor Start Version End Version
Mbed_tls Arm * 2.7.17 (excluding)
Mbed_tls Arm 2.8.0 (including) 2.16.8 (excluding)
Mbed_tls Arm 2.17.0 (including) 2.24.0 (excluding)

Potential Mitigations

References