Bugzilla – Bug 1189740
VUL-0: CVE-2020-36477: mbedtls: The verification of X.509 certificates when matching the expected common name with the actual certificate name is mishandled
Last modified: 2021-08-24 09:15:07 UTC
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 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). References: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-36477 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-36477 https://github.com/ARMmbed/mbedtls/issues/3498 https://github.com/ARMmbed/mbedtls/releases/tag/v2.24.0 http://www.cvedetails.com/cve/CVE-2020-36477/
fixed in factory, not sure if relevant for Leap