Hostname Verification Bypass in cURL and libcurl

CVE-2014-2522 · MEDIUM Severity

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

curl and libcurl 7.27.0 through 7.35.0, when running on Windows and using the SChannel/Winssl TLS backend, does not verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate when accessing a URL that uses a numerical IP address, which allows man-in-the-middle attackers to spoof servers via an arbitrary valid certificate.

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