curl -- password overflow vulnerability

curl security problems:

CVE-2018-14618: NTLM password overflow via integer overflow
The internal function Curl_ntlm_core_mk_nt_hash multiplies the length
of the password by two (SUM) to figure out how large temporary storage
area to allocate from the heap.
The length value is then subsequently used to iterate over the
password and generate output into the allocated storage buffer. On
systems with a 32 bit size_t, the math to calculate SUM triggers an
integer overflow when the password length exceeds 2GB (2^31 bytes).
This integer overflow usually causes a very small buffer to actually
get allocated instead of the intended very huge one, making the use of
that buffer end up in a heap buffer overflow.
This bug is almost identical to CVE-2017-8816.