Verify the received SSL certificate's CNAME matches the requested host #1
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The cURL manual explains the correct usage of CURLOPT_SSL_VERIFYHOST as follows: 1 to check the existence of a common name in the SSL peer certificate. 2 to check the existence of a common name and also verify that it matches the hostname provided. In production environments the value of this option should be kept at 2 (default value). CURLOPT_SSL_VERIFYHOST also cannot be used without CURLOPT_SSL_VERIFYPEER. See http://www.cs.utexas.edu/~shmat/shmat_ccs12.pdf for a full analysis of the security vulnerability here.
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The cURL manual explains the correct usage of CURLOPT_SSL_VERIFYHOST as follows:
1 to check the existence of a common name in the SSL peer certificate. 2 to check the existence of a common name and also verify that it matches the hostname provided. In production environments the value of this option should be kept at 2 (default value).
CURLOPT_SSL_VERIFYHOST also cannot be used without CURLOPT_SSL_VERIFYPEER. See http://www.cs.utexas.edu/~shmat/shmat_ccs12.pdf for a full analysis of the security vulnerability here.