{"id":"CVE-2013-1740","url":"https://www.cyber-defence.io/tools/cve/CVE-2013-1740","generatedAt":"2026-10-27T20:52:37.480Z","title":"The ssl_Do1stHandshake function in sslsecur.c in libssl in Mozilla Network Security Services (NSS) before 3.15.4, when the TLS False Start feature is enabled, allows man-in-the-middle attackers to spoof SSL servers by using an arbitrary X.509…","description":"The ssl_Do1stHandshake function in sslsecur.c in libssl in Mozilla Network Security Services (NSS) before 3.15.4, when the TLS False Start feature is enabled, allows man-in-the-middle attackers to spoof SSL servers by using an arbitrary X.509 certificate during certain handshake traffic.","published":"2014-01-18T22:55:03.000Z","lastModified":"2026-06-16T23:52:02.000Z","status":"Modified","sourceIdentifier":"security@mozilla.org","cvss":{"version":"2.0","score":5.8,"severity":"MEDIUM","vector":"AV:N/AC:M/Au:N/C:P/I:P/A:N"},"cwe":["CWE-310"],"affected":["mozilla/network security services"],"epss":{"score":0.01664,"percentile":0.76548,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (1.66%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00004.html","source":"security@mozilla.org"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00005.html","source":"security@mozilla.org"},{"url":"http://seclists.org/fulldisclosure/2014/Dec/23","source":"security@mozilla.org"},{"url":"http://www.oracle.com/technetwork/topics/security/cpujan2015-1972971.html","source":"security@mozilla.org"},{"url":"http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html","source":"security@mozilla.org"},{"url":"http://www.oracle.com/technetwork/topics/security/cpujul2014-1972956.html","source":"security@mozilla.org"},{"url":"http://www.oracle.com/technetwork/topics/security/cpuoct2014-1972960.html","source":"security@mozilla.org"},{"url":"http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html","source":"security@mozilla.org"},{"url":"http://www.securityfocus.com/archive/1/534161/100/0/threaded","source":"security@mozilla.org"},{"url":"http://www.securityfocus.com/bid/64944","source":"security@mozilla.org"},{"url":"http://www.ubuntu.com/usn/USN-2088-1","source":"security@mozilla.org"},{"url":"http://www.vmware.com/security/advisories/VMSA-2014-0012.html","source":"security@mozilla.org"},{"url":"https://bugs.gentoo.org/show_bug.cgi?id=498172","source":"security@mozilla.org"},{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=919877","tags":["Exploit"],"source":"security@mozilla.org"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1053725","source":"security@mozilla.org"},{"url":"https://developer.mozilla.org/docs/NSS/NSS_3.15.4_release_notes","source":"security@mozilla.org"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/90394","source":"security@mozilla.org"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00004.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00005.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://seclists.org/fulldisclosure/2014/Dec/23","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.oracle.com/technetwork/topics/security/cpujan2015-1972971.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.oracle.com/technetwork/topics/security/cpujul2014-1972956.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.oracle.com/technetwork/topics/security/cpuoct2014-1972960.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/archive/1/534161/100/0/threaded","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/64944","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/USN-2088-1","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.vmware.com/security/advisories/VMSA-2014-0012.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugs.gentoo.org/show_bug.cgi?id=498172","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=919877","tags":["Exploit"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1053725","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://developer.mozilla.org/docs/NSS/NSS_3.15.4_release_notes","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/90394","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2013-1740","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}