Race condition in the ssl_parse_serverhello_tlsext function in t1_lib.c in
OpenSSL 1.0.0 before 1.0.0n and 1.0.1 before 1.0.1i, when multithreading
and session resumption are used, allows remote SSL servers to cause a
denial of service (memory overwrite and client application crash) or
possibly have unspecified other impact by sending Elliptic Curve (EC)
Supported Point Formats Extension data.