CVE-2013-6422

MediumCVSS 4.0/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 2.0 4.0/10AV:N/AC:H/Au:N/C:P/I:P/A:N

Weakness enumeration

CWE-20

Affected software

No affected versions have been published.

Timeline

Published: Dec 23, 2013
Last modified: Jun 17, 2026
NVD status: Modified

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