CVE-2018-16890

libcurl versions from 7.36.0 to before 7.64.0 is vulnerable to a heap
buffer out-of-bounds read. The function handling incoming NTLM type-2
messages (lib/vauth/ntlm.c:ntlm_decode_type2_target) does not validate
incoming data correctly and is subject to an integer overflow
vulnerability. Using that overflow, a malicious or broken NTLM server could
trick libcurl to accept a bad length + offset combination that would lead
to a buffer read out-of-bounds.

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