The fix_hostname function in cURL and libcurl 7.37.0 through 7.41.0
does not properly calculate an index, which allows remote attackers to
cause a denial of service (out-of-bounds read or write and crash) or
possibly have other unspecified impact via a zero-length host name, as
demonstrated by "http://:80" and ":80."
Note:References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
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