CVE-2018-1000520

ARM mbedTLS version 2.7.0 and earlier contains a Ciphersuite Allows
Incorrectly Signed Certificates vulnerability in
mbedtls_ssl_get_verify_result() that can result in ECDSA-signed
certificates are accepted, when only RSA-signed ones should be… This
attack appear to be exploitable via Peers negotiate a TLS-ECDH-RSA-*
ciphersuite. Any of the peers can then provide an ECDSA-signed certificate,
when only an RSA-signed one should be accepted…