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CVE-2014-2522

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.

View on NVD

Severity

N/A

EPSS

Probability of exploitation (next 30 days): 0.0029 (0.3%)
Percentile: 52.5%
EPSS: 2026-05-06

Affects

haxx:curlhaxx:libcurlmicrosoft:windows

Technical description

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.

Published: 4/18/2014, 10:14:38 PM
Last modified: 5/6/2026, 10:30:45 PM

References

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