CVE-2013-6422

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.

🔗 References (10)

• secalert@redhathttp://curl.haxx.se/docs/adv_20131217.html
• secalert@redhathttp://www.debian.org/security/2013/dsa-2824
• secalert@redhathttp://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html
• secalert@redhathttp://www.ubuntu.com/usn/USN-2058-1
• secalert@redhathttps://h20564.www2.hp.com/hpsc/doc/public/display?docId=emr_na-c04463322
• af854a3a-2127-422b-91ae-364da2661108http://curl.haxx.se/docs/adv_20131217.html
• af854a3a-2127-422b-91ae-364da2661108http://www.debian.org/security/2013/dsa-2824
• af854a3a-2127-422b-91ae-364da2661108http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html
• af854a3a-2127-422b-91ae-364da2661108http://www.ubuntu.com/usn/USN-2058-1
• af854a3a-2127-422b-91ae-364da2661108https://h20564.www2.hp.com/hpsc/doc/public/display?docId=emr_na-c04463322