gnutls: gnutls_x509_dn_oid_name NULL pointer dereference

The gnutlsx509dnoidname function in lib/x509/common.c in GnuTLS 3.0 before 3.1.20 and 3.2.x before 3.2.10 allows remote attackers to cause a denial of service NULL pointer dereference via a crafted X.509 certificate, related to a missing LDAP description for an OID when printing the DN...