CVE-2016-0739

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"matchCriteriaId": "7478A2F8-96FC-4542-9130-3DDA890386BC", "versionEndIncluding": "0.7.2", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:fedoraproject:fedora:22:*:*:*:*:*:*:*", "matchCriteriaId": "253C303A-E577-4488-93E6-68A8DD942C38", "vulnerable": true}, {"criteria": "cpe:2.3:o:fedoraproject:fedora:23:*:*:*:*:*:*:*", "matchCriteriaId": "E79AB8DD-C907-4038-A931-1A5A4CFB6A5B", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*", "matchCriteriaId": "16F59A04-14CF-49E2-9973-645477EA09DA", "vulnerable": true}, {"criteria": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*", "matchCriteriaId": "C11E6FB0-C8C0-4527-9AA0-CB9B316F8F43", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "libssh before 0.7.3 improperly truncates ephemeral secrets generated for the (1) 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"PARTIAL", "integrityImpact": "NONE", "vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:N", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.0"}, "exploitabilityScore": 2.2, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2016-04-13T17:59:08.413", "references": [{"source": "secalert@redhat.com", "url": "http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178058.html"}, {"source": 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{"acknowledgement": "Red Hat would like to thank Aris Adamantiadis for reporting this issue.", "affected_release": [{"advisory": "RHSA-2016:0566", "cpe": "cpe:/a:redhat:rhel_extras_other:7", "package": "libssh-0:0.7.1-2.el7", "product_name": "Red Hat Enterprise Linux 7 Extras", "release_date": "2016-03-31T00:00:00Z"}], "bugzilla": {"description": "libssh: bits/bytes confusion resulting in truncated Difffie-Hellman secret length", "id": "1305971", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1305971"}, "csaw": false, "cvss": {"cvss_base_score": "5.8", "cvss_scoring_vector": "AV:N/AC:M/Au:N/C:P/I:P/A:N", "status": "verified"}, "cwe": "CWE-704", "details": ["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.\"", "A type confusion issue was found in the way libssh generated ephemeral secrets for the diffie-hellman-group1 and diffie-hellman-group14 key exchange methods. This would cause an SSHv2 Diffie-Hellman handshake to use significantly less secure random parameters."], "name": "CVE-2016-0739", "public_date": "2016-02-23T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2016-0739\nhttps://nvd.nist.gov/vuln/detail/CVE-2016-0739\nhttps://www.libssh.org/security/advisories/CVE-2016-0739.txt"], "threat_severity": "Moderate"}

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