This update to mbedtls 1.3.19 fixes security issues and bugs.
The following vulnerability was fixed:
CVE-2017-2784: A remote user could have used a specially crafted certificate to cause mbedtls to free a buffer allocated on the stack when verifying the validity of public key with a secp224k1 curve, which could have allowed remote code execution on some platforms (boo#1029017)
The following non-security changes are included: