{"id":"CVE-2014-2903","aliases":["DEBIAN-CVE-2014-2903","EUVD-2014-2926","GHSA-9gm2-vj3x-997g"],"status":"published","title":"CyaSSL does not check the key usage extension in leaf certificates, which allows remote attackers...","description":"CyaSSL does not check the key usage extension in leaf certificates, which allows remote attackers to spoof servers via a crafted server certificate not authorized for use in an SSL/TLS handshake.","severity":{"version":"3.0","score":5.9,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.00959,"percentile":0.6173,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-310"],"published":"2017-10-06T15:00:00Z","modified":"2026-10-23T16:00:42Z","fixes":[{"ecosystem":"Debian:12","package":"wolfssl","fixed_in":["3.4.8+dfsg-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"wolfssl","fixed_in":["3.4.8+dfsg-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"wolfssl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.4.8+dfsg-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"wolfssl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.4.8+dfsg-1"}]}]}],"products":[{"vendor":"wolfssl","product":"wolfssl"}],"references":[{"url":"http://secunia.com/advisories/62604","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Permissions Required","Third Party Advisory","advisory","report"]},{"url":"http://www.openwall.com/lists/oss-security/2014/04/18/2","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory","advisory","article"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2014-2903"},{"url":"https://github.com/advisories/GHSA-9gm2-vj3x-997g"},{"url":"https://security-tracker.debian.org/tracker/CVE-2014-2903","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2014-2903","description":"CyaSSL does not check the key usage extension in leaf certificates, which allows remote attackers to spoof servers via a crafted server certificate not authorized for use in an SSL/TLS handshake.","status":"published","published":"2017-10-06T15:00:00Z","modified":"2024-08-06T10:28:46.292Z","updated_at":"2026-11-02T14:33:43.566796Z"}],"euvd":[{"id":"EUVD-2014-2926","description":"CyaSSL does not check the key usage extension in leaf certificates, which allows remote attackers to spoof servers via a crafted server certificate not authorized for use in an SSL/TLS handshake.","status":"published","published":"2017-10-06T15:00:00Z","modified":"2024-08-06T10:28:46Z","updated_at":"2026-11-03T01:57:12.660671Z"}],"ghsa":[{"id":"GHSA-9gm2-vj3x-997g","title":"CyaSSL does not check the key usage extension in leaf certificates, which allows remote attackers...","description":"CyaSSL does not check the key usage extension in leaf certificates, which allows remote attackers to spoof servers via a crafted server certificate not authorized for use in an SSL/TLS handshake.","status":"published","published":"2022-05-17T00:33:21Z","modified":"2023-02-03T05:02:01Z","cvss":[{"version":"3.0","score":5.9,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T14:53:04.921346Z"}],"nvd":[{"id":"CVE-2014-2903","description":"CyaSSL does not check the key usage extension in leaf certificates, which allows remote attackers to spoof servers via a crafted server certificate not authorized for use in an SSL/TLS handshake.","status":"published","published":"2017-10-06T15:29:00.297Z","modified":"2026-06-17T00:07:20.507Z","cvss":[{"version":"3.0","score":5.9,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-310"],"updated_at":"2026-11-02T14:02:59.001778Z"}],"osv":[{"id":"CVE-2014-2903","description":"CyaSSL does not check the key usage extension in leaf certificates, which allows remote attackers to spoof servers via a crafted server certificate not authorized for use in an SSL/TLS handshake.","status":"published","published":"2017-10-06T15:29:00Z","modified":"2026-04-10T03:44:39.259465Z","cvss":[{"version":"3.0","score":5.9,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:43:59.654289Z"},{"id":"DEBIAN-CVE-2014-2903","description":"CyaSSL does not check the key usage extension in leaf certificates, which allows remote attackers to spoof servers via a crafted server certificate not authorized for use in an SSL/TLS handshake.","status":"published","published":"2017-10-06T15:29:00.297Z","modified":"2026-10-23T16:00:42.37894834Z","cvss":[{"version":"3.0","score":5.9,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:26.134753Z"}]}}