{"id":"CVE-2016-0739","url":"https://www.cyber-defence.io/tools/cve/CVE-2016-0739","generatedAt":"2026-10-27T23:08:09.718Z","title":"libssh before 0.7.3 improperly truncates ephemeral secrets generated for the (1) diffie-hellman-group1 and (2) diffie-hellman-group14 key exchange methods to 128 bits, which makes it easier for man-in-the-middle attackers to decrypt or intercept SSH…","description":"libssh before 0.7.3 improperly truncates ephemeral secrets generated for the (1) diffie-hellman-group1 and (2) diffie-hellman-group14 key exchange methods to 128 bits, which makes it easier for man-in-the-middle attackers to decrypt or intercept SSH sessions via unspecified vectors, aka a \"bits/bytes confusion bug.\"","published":"2016-04-13T17:59:08.000Z","lastModified":"2026-06-17T00:38:08.000Z","status":"Modified","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"3.0","score":5.9,"severity":"MEDIUM","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"},"cwe":["CWE-200"],"affected":["redhat/enterprise linux","canonical/ubuntu linux","libssh/libssh","fedoraproject/fedora","debian/debian linux"],"epss":{"score":0.02431,"percentile":0.8413,"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 (2.43%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178058.html","source":"secalert@redhat.com"},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2016-March/178822.html","source":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-updates/2016-03/msg00111.html","source":"secalert@redhat.com"},{"url":"http://rhn.redhat.com/errata/RHSA-2016-0566.html","source":"secalert@redhat.com"},{"url":"http://www.debian.org/security/2016/dsa-3488","source":"secalert@redhat.com"},{"url":"http://www.ubuntu.com/usn/USN-2912-1","source":"secalert@redhat.com"},{"url":"https://puppet.com/security/cve/CVE-2016-0739","source":"secalert@redhat.com"},{"url":"https://security.gentoo.org/glsa/201606-12","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"https://www.libssh.org/2016/02/23/libssh-0-7-3-security-and-bugfix-release/","tags":["Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"https://www.libssh.org/security/advisories/CVE-2016-0739.txt","tags":["Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178058.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2016-March/178822.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-updates/2016-03/msg00111.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://rhn.redhat.com/errata/RHSA-2016-0566.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.debian.org/security/2016/dsa-3488","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/USN-2912-1","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://puppet.com/security/cve/CVE-2016-0739","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.gentoo.org/glsa/201606-12","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.libssh.org/2016/02/23/libssh-0-7-3-security-and-bugfix-release/","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.libssh.org/security/advisories/CVE-2016-0739.txt","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2016-0739","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."}