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{}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*", "matchCriteriaId": "27C9A807-7740-4D75-9B01-91ED53D14C40", "versionEndIncluding": "6.9", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The kbdint_next_device function in auth2-chall.c in sshd in OpenSSH through 6.9 does not properly restrict the processing of keyboard-interactive devices within a single connection, which makes it easier for remote attackers to conduct brute-force attacks or cause a denial of service (CPU consumption) via a long and duplicative list in the ssh -oKbdInteractiveDevices option, as demonstrated by a modified client that provides a different password for each pam element on this list."}, {"lang": "es", "value": "Vulnerabilidad en la funci\u00f3n kbdint_next_device en auth2-chall.c en sshd en OpenSSH hasta la versi\u00f3n 6.9, no restringe correctamente el procesamiento de dispositivos de teclado interactivo con una \u00fanica conexi\u00f3n, lo cual facilita a atacantes remotos ejecutar un ataque de fuerza bruta o causar una denegaci\u00f3n de servicio (mediante el consumo de la CPU) a trav\u00e9s de una lista larga y redundante en la opci\u00f3n ssh -oKbdInteractiveDevices, seg\u00fan lo demostrado por una modificaci\u00f3n en el cliente que provee una contrase\u00f1a diferente para cada uno de los elementos pam de la lista."}], "id": "CVE-2015-5600", "lastModified": "2022-12-13T12:15:17.307", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 8.5, "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:C", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 7.8, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}]}, "published": "2015-08-03T01:59:03.950", "references": [{"source": "cve@mitre.org", "url": "http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/auth2-chall.c"}, {"source": "cve@mitre.org", "url": "http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/auth2-chall.c.diff?r1=1.42&r2=1.43&f=h"}, {"source": "cve@mitre.org", "url": "http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10697"}, {"source": "cve@mitre.org", "url": "http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html"}, {"source": "cve@mitre.org", "url": "http://lists.fedoraproject.org/pipermail/package-announce/2015-August/165170.html"}, {"source": "cve@mitre.org", "url": "http://lists.fedoraproject.org/pipermail/package-announce/2015-July/162955.html"}, {"source": "cve@mitre.org", "url": "http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00017.html"}, {"source": "cve@mitre.org", "url": "http://openwall.com/lists/oss-security/2015/07/23/4"}, {"source": "cve@mitre.org", "url": "http://rhn.redhat.com/errata/RHSA-2016-0466.html"}, {"source": "cve@mitre.org", "tags": ["Exploit"], "url": "http://seclists.org/fulldisclosure/2015/Jul/92"}, {"source": "cve@mitre.org", "url": "http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html"}, {"source": "cve@mitre.org", "url": "http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html"}, {"source": "cve@mitre.org", "url": "http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html"}, {"source": "cve@mitre.org", "url": "http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html"}, {"source": "cve@mitre.org", "url": "http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html"}, {"source": "cve@mitre.org", "url": "http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html"}, {"source": "cve@mitre.org", "url": "http://www.securityfocus.com/bid/75990"}, {"source": "cve@mitre.org", "url": "http://www.securityfocus.com/bid/91787"}, {"source": "cve@mitre.org", "url": "http://www.securityfocus.com/bid/92012"}, {"source": "cve@mitre.org", "url": "http://www.securitytracker.com/id/1032988"}, {"source": "cve@mitre.org", "url": "http://www.ubuntu.com/usn/USN-2710-1"}, {"source": "cve@mitre.org", "url": "http://www.ubuntu.com/usn/USN-2710-2"}, {"source": "cve@mitre.org", "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf"}, {"source": "cve@mitre.org", "url": "https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04952480"}, {"source": "cve@mitre.org", "url": "https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05128992"}, {"source": "cve@mitre.org", "url": "https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05157667"}, {"source": "cve@mitre.org", "url": "https://kc.mcafee.com/corporate/index?page=content&id=SB10136"}, {"source": "cve@mitre.org", "url": "https://kc.mcafee.com/corporate/index?page=content&id=SB10157"}, {"source": "cve@mitre.org", "url": "https://lists.debian.org/debian-lts-announce/2018/09/msg00010.html"}, {"source": "cve@mitre.org", "url": "https://security.gentoo.org/glsa/201512-04"}, {"source": "cve@mitre.org", "url": "https://security.netapp.com/advisory/ntap-20151106-0001/"}, {"source": "cve@mitre.org", "url": "https://support.apple.com/kb/HT205031"}, {"source": "cve@mitre.org", "url": "https://www.arista.com/en/support/advisories-notices/security-advisories/1174-security-advisory-12"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-264"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2016:0466", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "openssh-0:5.3p1-114.el6_7", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2016-03-21T00:00:00Z"}, {"advisory": "RHSA-2015:2088", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "openssh-0:6.6.1p1-22.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2015-11-19T00:00:00Z"}], "bugzilla": {"description": "openssh: MaxAuthTries limit bypass via duplicates in KbdInteractiveDevices", "id": "1245969", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1245969"}, "csaw": false, "cvss": {"cvss_base_score": "4.3", "cvss_scoring_vector": "AV:N/AC:M/Au:N/C:N/I:P/A:N", "status": "verified"}, "cwe": "CWE-304", "details": ["The kbdint_next_device function in auth2-chall.c in sshd in OpenSSH through 6.9 does not properly restrict the processing of keyboard-interactive devices within a single connection, which makes it easier for remote attackers to conduct brute-force attacks or cause a denial of service (CPU consumption) via a long and duplicative list in the ssh -oKbdInteractiveDevices option, as demonstrated by a modified client that provides a different password for each pam element on this list.", "It was discovered that the OpenSSH sshd daemon did not check the list of keyboard-interactive authentication methods for duplicates. A remote attacker could use this flaw to bypass the MaxAuthTries limit, making it easier to perform password guessing attacks."], "mitigation": {"lang": "en:us", "value": "This issue can be mitigated by disabling keyboard-interactive authentication method. That can be achieved by setting \"ChallengeResponseAuthentication no\" in the /etc/ssh/sshd_config configuration file and restarting the sshd service."}, "name": "CVE-2015-5600", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:4", "fix_state": "Will not fix", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 4"}, {"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Will not fix", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 5"}], "public_date": "2015-07-16T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2015-5600\nhttps://nvd.nist.gov/vuln/detail/CVE-2015-5600\nhttps://kingcope.wordpress.com/2015/07/16/openssh-keyboard-interactive-authentication-brute-force-vulnerability-maxauthtries-bypass/"], "statement": "This issue does not affect the default OpenSSH sshd configuration in Red Hat Enterprise Linux 4, 5, 6 and 7.", "threat_severity": "Low", "upstream_fix": "openssh 7.0"}