cURL/libcURL 7.x < 7.39.0 'curl_easy_duphandle()' Out-of-Bounds Read Issue

Versions of cURL/libcURL older than 7.39.0 are unpatched for an out-of-bounds read vulnerability in the ‘curl_easy_duphandle()’ function, which is triggered when using the CURLOPT_COPYPOSTFIELDS option and sending a binary HTTP POST. This can be leveraged to cause a crash or disclose heap memory contents.