GnuTLS Backend in libcurl: Disabling Host Name Verification Vulnerability

CVE-2013-6422 · MEDIUM Severity

AV:N/AC:H/AU:N/C:P/I:P/A:N

The GnuTLS backend in libcurl 7.21.4 through 7.33.0, when disabling digital signature verification (CURLOPT_SSL_VERIFYPEER), also disables the CURLOPT_SSL_VERIFYHOST check for CN or SAN host name fields, which makes it easier for remote attackers to spoof servers and conduct man-in-the-middle (MITM) attacks.

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