{"id":"CVE-2013-4545","aliases":["CURL-CVE-2013-4545","DEBIAN-CVE-2013-4545","DSA-2798-1","EUVD-2013-4404","GHSA-94rh-gwj6-33j3","MGASA-2013-0338","SUSE-SU-2015:0962-1","openSUSE-SU-2024:10303-1"],"status":"published","title":"cURL and libcurl 7.18.0 through 7.32.0, when built with OpenSSL, disables the certificate CN and...","description":"cURL and libcurl 7.18.0 through 7.32.0, when built with OpenSSL, disables the certificate CN and SAN name field verification (CURLOPT_SSL_VERIFYHOST) when the digital signature verification (CURLOPT_SSL_VERIFYPEER) is disabled, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate.","severity":{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.02969,"percentile":0.87338,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-310"],"published":"2013-11-15T08:00:00Z","modified":"2026-10-24T23:17:46Z","fixes":[{"ecosystem":"Debian:12","package":"curl","fixed_in":["7.33.0-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"curl","fixed_in":["7.33.0-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"curl","fixed_in":["7.33.0-1"],"sources":["osv"]},{"ecosystem":"Debian:6.0","package":"curl","fixed_in":["7.21.0-2.1+squeeze5"],"sources":["osv"]},{"ecosystem":"Debian:7","package":"curl","fixed_in":["7.26.0-1+wheezy5"],"sources":["osv"]},{"ecosystem":"Mageia:2","package":"curl","fixed_in":["7.24.0-1.3.mga2"],"sources":["osv"]},{"ecosystem":"Mageia:3","package":"curl","fixed_in":["7.28.1-6.2.mga3"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"curl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.33.0-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"curl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.33.0-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"curl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.33.0-1"}]}]},{"source":"osv","ecosystem":"Debian:6.0","package":"curl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.21.0-2.1+squeeze5"}]}],"versions":["7.21.0-1","7.21.0-2","7.21.0-2.1+squeeze1","7.21.0-2.1+squeeze2","7.21.0-2.1+squeeze3","7.21.0-2.1+squeeze4"]},{"source":"osv","ecosystem":"Debian:7","package":"curl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.26.0-1+wheezy5"}]}],"versions":["7.26.0-1+wheezy2","7.26.0-1+wheezy3","7.26.0-1+wheezy4"]},{"source":"osv","ecosystem":"Mageia:2","package":"curl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.24.0-1.3.mga2"}]}]},{"source":"osv","ecosystem":"Mageia:3","package":"curl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.28.1-6.2.mga3"}]}]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"curl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.51.0-1.1"}]}],"bundled":32}],"products":[{"vendor":"haxx","product":"curl"},{"vendor":"haxx","product":"libcurl"}],"references":[{"url":"http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html","tags":["x_refsource_CONFIRM","x_transferred","web"]},{"url":"https://h20564.www2.hp.com/hpsc/doc/public/display?docId=emr_na-c04463322","tags":["vendor-advisory","x_refsource_HP","x_transferred","web"]},{"url":"http://curl.haxx.se/docs/adv_20131115.html","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory","web"]},{"url":"http://www.oracle.com/technetwork/topics/security/cpujan2015-1972971.html","tags":["x_refsource_CONFIRM","x_transferred","web"]},{"url":"http://www.oracle.com/technetwork/topics/security/cpuapr2015-2365600.html","tags":["x_refsource_CONFIRM","x_transferred","web"]},{"url":"http://www.debian.org/security/2013/dsa-2798","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred","advisory","web"]},{"url":"http://lists.opensuse.org/opensuse-updates/2013-12/msg00047.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","web"]},{"url":"http://www.ubuntu.com/usn/USN-2048-1","tags":["vendor-advisory","x_refsource_UBUNTU","x_transferred","advisory"]},{"url":"http://lists.opensuse.org/opensuse-updates/2013-12/msg00053.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2013-4545"},{"url":"https://github.com/advisories/GHSA-94rh-gwj6-33j3"},{"url":"https://security-tracker.debian.org/tracker/CVE-2013-4545","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2013-0338.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=11703","tags":["report"]},{"url":"https://www.suse.com/support/update/announcement/2015/suse-su-20150962-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/824517","tags":["report"]},{"url":"https://bugzilla.suse.com/849596","tags":["report"]},{"url":"https://bugzilla.suse.com/858673","tags":["report"]},{"url":"https://bugzilla.suse.com/868627","tags":["report"]},{"url":"https://bugzilla.suse.com/868629","tags":["report"]},{"url":"https://bugzilla.suse.com/870444","tags":["report"]},{"url":"https://bugzilla.suse.com/927174","tags":["report"]},{"url":"https://bugzilla.suse.com/927556","tags":["report"]},{"url":"https://bugzilla.suse.com/927746","tags":["report"]},{"url":"https://bugzilla.suse.com/928533","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2013-2174","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-4545","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-0015","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-0138","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-0139","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-3143","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-3148","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-3153","tags":["web"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2009-0037","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2009-2417","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-0249","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-1944","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-3613","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-3620","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-8150","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-3144","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-3145","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-3236","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-3237","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-0755","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-7167","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-8615","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-8616","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-8617","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-8618","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-8619","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-8620","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-8621","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-8622","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-8623","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-8624","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-8625","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2013-4545","description":"cURL and libcurl 7.18.0 through 7.32.0, when built with OpenSSL, disables the certificate CN and SAN name field verification (CURLOPT_SSL_VERIFYHOST) when the digital signature verification (CURLOPT_SSL_VERIFYPEER) is disabled, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate.","status":"published","published":"2013-11-23T11:00:00Z","modified":"2024-08-06T16:45:14.83Z","updated_at":"2026-11-02T14:34:57.869657Z"}],"euvd":[{"id":"EUVD-2013-4404","description":"cURL and libcurl 7.18.0 through 7.32.0, when built with OpenSSL, disables the certificate CN and SAN name field verification (CURLOPT_SSL_VERIFYHOST) when the digital signature verification (CURLOPT_SSL_VERIFYPEER) is disabled, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate.","status":"published","published":"2013-11-23T11:00:00Z","modified":"2024-08-06T16:45:14Z","updated_at":"2026-11-03T01:56:31.667445Z"}],"ghsa":[{"id":"GHSA-94rh-gwj6-33j3","title":"cURL and libcurl 7.18.0 through 7.32.0, when built with OpenSSL, disables the certificate CN and...","description":"cURL and libcurl 7.18.0 through 7.32.0, when built with OpenSSL, disables the certificate CN and SAN name field verification (CURLOPT_SSL_VERIFYHOST) when the digital signature verification (CURLOPT_SSL_VERIFYPEER) is disabled, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate.","status":"published","published":"2022-05-17T03:53:11Z","modified":"2023-01-28T05:00:40Z","updated_at":"2026-11-02T14:43:23.362712Z"}],"nvd":[{"id":"CVE-2013-4545","description":"cURL and libcurl 7.18.0 through 7.32.0, when built with OpenSSL, disables the certificate CN and SAN name field verification (CURLOPT_SSL_VERIFYHOST) when the digital signature verification (CURLOPT_SSL_VERIFYPEER) is disabled, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate.","status":"published","published":"2013-11-23T11:55:04.74Z","modified":"2026-06-16T23:57:25.54Z","cvss":[{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-310"],"updated_at":"2026-11-02T14:02:40.988689Z"}],"osv":[{"id":"CURL-CVE-2013-4545","title":"cert name check ignore OpenSSL","description":"libcurl is vulnerable to a case of missing out the checking of the\n  certificate CN or SAN name field when the digital signature verification is\n  turned off.\n\n  libcurl offers two separate and independent options for verifying a server's\n  TLS certificate. `CURLOPT_SSL_VERIFYPEER` and `CURLOPT_SSL_VERIFYHOST`. The\n  first one tells libcurl to verify the trust chain using a CA cert bundle,\n  while the second tells libcurl to make sure that the name fields in the\n  server certificate meets the criteria. Both options are enabled by default.\n\n  This flaw had the effect that when an application disabled\n  `CURLOPT_SSL_VERIFYPEER`, libcurl mistakenly also disabled the\n  `CURLOPT_SSL_VERIFYHOST` check. Applications can disable\n  `CURLOPT_SSL_VERIFYPEER` and still achieve security by doing the check on\n  its own using other means.\n\n  The curl command line tool is not affected by this problem as it either\n  enables both options or disables both at the same time.","status":"published","published":"2013-11-15T08:00:00Z","modified":"2026-10-24T23:17:46Z","updated_at":"2026-11-02T15:43:55.669514Z"},{"id":"CVE-2013-4545","description":"cURL and libcurl 7.18.0 through 7.32.0, when built with OpenSSL, disables the certificate CN and SAN name field verification (CURLOPT_SSL_VERIFYHOST) when the digital signature verification (CURLOPT_SSL_VERIFYPEER) is disabled, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate.","status":"published","published":"2013-11-23T11:55:04Z","modified":"2026-04-16T06:15:56.19239827Z","updated_at":"2026-11-02T15:43:59.09154Z"},{"id":"DEBIAN-CVE-2013-4545","description":"cURL and libcurl 7.18.0 through 7.32.0, when built with OpenSSL, disables the certificate CN and SAN name field verification (CURLOPT_SSL_VERIFYHOST) when the digital signature verification (CURLOPT_SSL_VERIFYPEER) is disabled, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate.","status":"published","published":"2013-11-23T11:55:04.74Z","modified":"2026-09-01T20:03:18.41786008Z","updated_at":"2026-11-02T15:45:25.514579Z"},{"id":"DSA-2798-1","title":"curl - unchecked ssl certificate host name","status":"published","published":"2013-11-17T00:00:00Z","modified":"2026-03-09T01:17:46.493103Z","updated_at":"2026-11-02T15:46:15.489951Z"},{"id":"MGASA-2013-0338","title":"Updated curl packages fix CVE-2013-4545","description":"Updated curl packages fix security vulnerability:\n\nScott Cantor discovered that curl, a file retrieval tool, would disable the\nCURLOPT_SSLVERIFYHOST check when the CURLOPT_SSL_VERIFYPEER setting was\ndisabled. This would also disable ssl certificate host name checks when it\nshould have only disabled verification of the certificate trust chain\n(CVE-2013-4545).\n","status":"published","published":"2013-11-20T20:56:39Z","modified":"2026-04-16T06:26:17.086441795Z","updated_at":"2026-11-02T15:49:39.121227Z"},{"id":"openSUSE-SU-2024:10303-1","title":"curl-7.51.0-1.1 on GA media","description":"These are all security issues fixed in the curl-7.51.0-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T02:45:23.860668Z","updated_at":"2026-11-02T16:58:33.135986Z"},{"id":"SUSE-SU-2015:0962-1","title":"Security update for curl","description":"\nThis curl update fixes the following security issues:\n\n    * bnc#868627: wrong re-use of connections (CVE-2014-0138).\n    * bnc#868629: IP address wildcard certificate validation\n      (CVE-2014-0139).\n    * bnc#870444: --insecure option inappropriately enforcing security\n      safeguard.\n\nSecurity Issue references:\n\n    * CVE-2014-0138\n      \u003chttp://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0138\u003e\n    * CVE-2014-0139\n      \u003chttp://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0139\u003e\n\n","status":"published","published":"2014-04-15T15:50:15Z","modified":"2026-02-04T03:17:15.082145Z","updated_at":"2026-11-02T15:53:41.276824Z"}]}}