CVE-2020-36477

An issue was discovered in Mbed TLS before 2.24.0. The verification of X.509 certificates when matching the expected common name the cn argument of mbedtlsx509crtverify with the actual certificate name is mishandled: when the subjecAltName extension is present, the expected name is compared to an...

CVE-2020-36477

CVE-2020-36477 affects Mbed TLS up to version 2.24.0. The issue: when verifying X.509 certificates, the expected name is incorrectly compared to any name in the subjectAltName extension, regardless of type. This enables an attacker to impersonate a 4-byte or 16-byte domain by obtaining a certific...