CVE-2020-36477 | BDVDB-2026-159274 Detail

Description#

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 mbedtls_x509_crt_verify) with the actual certificate name is mishandled: when the subjecAltName extension is present, the expected name is compared to any name in that extension regardless of its type. This means that an attacker could impersonate a 4-byte or 16-byte domain by getting a certificate for the corresponding IPv4 or IPv6 address (this would require the attacker to control that IP address, though).

Impact#

Weaknesses#

References#

Exploit#

History#

1. Version 12021-08-23Record published in the CVE List.
2. Version 22024-08-04Most recent update recorded in the CVE List.