{"api_version":"1","generated_at":"2026-04-23T11:33:41+00:00","cve":"CVE-2015-5600","urls":{"html":"https://cve.report/CVE-2015-5600","api":"https://cve.report/api/cve/CVE-2015-5600.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2015-5600","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2015-5600"},"summary":{"title":"CVE-2015-5600","description":"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.","state":"PUBLIC","assigner":"cve@mitre.org","published_at":"2015-08-03 01:59:00","updated_at":"2022-12-13 12:15:00"},"problem_types":["CWE-264"],"metrics":[],"references":[{"url":"https://security.gentoo.org/glsa/201512-04","name":"GLSA-201512-04","refsource":"GENTOO","tags":[],"title":"OpenSSH: Multiple vulnerabilities (GLSA 201512-04) — Gentoo Security","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://security.netapp.com/advisory/ntap-20151106-0001/","name":"https://security.netapp.com/advisory/ntap-20151106-0001/","refsource":"CONFIRM","tags":[],"title":"CVE-2015-5600 OpenSSH MaxAuthTries Bypass Vulnerability in NetApp Products | NetApp Product Security","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.debian.org/debian-lts-announce/2018/09/msg00010.html","name":"[debian-lts-announce] 20180910 [SECURITY] [DLA 1500-1] openssh security update","refsource":"MLIST","tags":[],"title":"[SECURITY] [DLA 1500-1] openssh security update","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/auth2-chall.c.diff?r1=1.42&r2=1.43&f=h","name":"http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/auth2-chall.c.diff?r1=1.42&r2=1.43&f=h","refsource":"CONFIRM","tags":[],"title":"src/usr.bin/ssh/auth2-chall.c - diff - 1.43","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html","name":"http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html","refsource":"CONFIRM","tags":[],"title":"Oracle Critical Patch Update - July 2016","mime":"text/html","httpstatus":"200","archivestatus":"0"},{"url":"https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05157667","name":"https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05157667","refsource":"CONFIRM","tags":[],"title":"HPE Support document - HPE Support Center","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://www.securityfocus.com/bid/91787","name":"91787","refsource":"BID","tags":[],"title":"Oracle July 2016 Critical Patch Update Multiple Vulnerabilities","mime":"text/html","httpstatus":"200","archivestatus":"0"},{"url":"https://kc.mcafee.com/corporate/index?page=content&id=SB10157","name":"https://kc.mcafee.com/corporate/index?page=content&id=SB10157","refsource":"CONFIRM","tags":[],"title":"McAfee Security Bulletin: Network Security Virtual Platform update resolves OpenSSH vulnerability that bypasses authentication restrictions defined by MaxAuthTries","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.arista.com/en/support/advisories-notices/security-advisories/1174-security-advisory-12","name":"https://www.arista.com/en/support/advisories-notices/security-advisories/1174-security-advisory-12","refsource":"MISC","tags":[],"title":"Arista - Security Advisory 0012","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://www.ubuntu.com/usn/USN-2710-2","name":"USN-2710-2","refsource":"UBUNTU","tags":[],"title":"USN-2710-2: OpenSSH regression | Ubuntu","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05128992","name":"https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05128992","refsource":"CONFIRM","tags":[],"title":"Document Display | HPE Support Center","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"http://www.securitytracker.com/id/1032988","name":"1032988","refsource":"SECTRACK","tags":[],"title":"OpenSSH 'KbdInteractiveDevices' Lets Remote Users Bypass Security Restrictions on the Target System - SecurityTracker","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://support.apple.com/kb/HT205031","name":"https://support.apple.com/kb/HT205031","refsource":"CONFIRM","tags":[],"title":"About the security content of OS X Yosemite v10.10.5 and Security Update 2015-006 - Apple Support","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html","name":"http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html","refsource":"CONFIRM","tags":[],"title":"CPU July 2018","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html","name":"http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html","refsource":"CONFIRM","tags":[],"title":"Oracle Solaris Third Party Bulletin - October 2015","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"http://seclists.org/fulldisclosure/2015/Jul/92","name":"20150717 OpenSSH keyboard-interactive authentication brute force vulnerability (MaxAuthTries bypass)","refsource":"FULLDISC","tags":["Exploit"],"title":"Full Disclosure: OpenSSH keyboard-interactive authentication brute force vulnerability (MaxAuthTries bypass)","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html","name":"http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html","refsource":"CONFIRM","tags":[],"title":"Oracle Linux Bulletin - April 2016","mime":"text/html","httpstatus":"200","archivestatus":"0"},{"url":"http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html","name":"http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html","refsource":"CONFIRM","tags":[],"title":"Oracle VM Server for x86 Bulletin - July 2016","mime":"text/html","httpstatus":"-1","archivestatus":"200"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00017.html","name":"SUSE-SU-2015:1581","refsource":"SUSE","tags":[],"title":"[security-announce] SUSE-SU-2015:1581-1: important: Security update for","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://www.securityfocus.com/bid/92012","name":"92012","refsource":"BID","tags":[],"title":"RETIRED: Oracle Integrated Lights Out Manager CVE-2015-5600 Remote Security Vulnerability","mime":"text/html","httpstatus":"200","archivestatus":"0"},{"url":"http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html","name":"http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html","refsource":"CONFIRM","tags":[],"title":"Oracle Linux Bulletin - October 2015","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf","name":"https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf","refsource":"CONFIRM","tags":[],"title":"","mime":"application/pdf","httpstatus":"200","archivestatus":"404"},{"url":"https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04952480","name":"https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04952480","refsource":"CONFIRM","tags":[],"title":"Document Display | HPE Support Center","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://kc.mcafee.com/corporate/index?page=content&id=SB10136","name":"https://kc.mcafee.com/corporate/index?page=content&id=SB10136","refsource":"CONFIRM","tags":[],"title":"McAfee KnowledgeBase - Intel Security - Security Bulletin: Firewall Enterprise update fixes OpenSSH CVE-2015-5600 and CVE-2015-6564 vulnerabilities","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html","name":"APPLE-SA-2015-08-13-2","refsource":"APPLE","tags":[],"title":"APPLE-SA-2015-08-13-2 OS X Yosemite v10.10.5 and Security Update\t2015-006","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://www.ubuntu.com/usn/USN-2710-1","name":"USN-2710-1","refsource":"UBUNTU","tags":[],"title":"USN-2710-1: OpenSSH vulnerabilities | Ubuntu","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/auth2-chall.c","name":"http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/auth2-chall.c","refsource":"CONFIRM","tags":[],"title":"CVS log for src/usr.bin/ssh/auth2-chall.c","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2015-August/165170.html","name":"FEDORA-2015-13469","refsource":"FEDORA","tags":[],"title":"[SECURITY] Fedora 21 Update: openssh-6.6.1p1-16.fc21","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://rhn.redhat.com/errata/RHSA-2016-0466.html","name":"RHSA-2016:0466","refsource":"REDHAT","tags":[],"title":"Red Hat Customer Portal","mime":"text/html","httpstatus":"-1","archivestatus":"200"},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2015-July/162955.html","name":"FEDORA-2015-11981","refsource":"FEDORA","tags":[],"title":"[SECURITY] Fedora 22 Update: openssh-6.9p1-3.fc22","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10697","name":"http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10697","refsource":"CONFIRM","tags":[],"title":"Juniper Networks - 2015-10 Security Bulletin: Junos: OpenSSH brute force keyboard interactive MaxAuthTries bypass (CVE-2015-5600)","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://www.securityfocus.com/bid/75990","name":"75990","refsource":"BID","tags":[],"title":"OpenSSH Login Handling Security Bypass Weakness","mime":"text/html","httpstatus":"200","archivestatus":"0"},{"url":"http://openwall.com/lists/oss-security/2015/07/23/4","name":"[oss-security] 20150723 Re: CVE Request for OpenSSH vulnerability - authentication limits bypass","refsource":"MLIST","tags":[],"title":"oss-security - Re: CVE Request for OpenSSH vulnerability - authentication limits bypass","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2015-5600","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2015-5600","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2015","cve_id":"5600","vulnerable":"1","versionEndIncluding":"6.9","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"openbsd","cpe5":"openssh","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[{"cve":"CVE-2015-5600","qid":"591280","title":"Siemens SCALANCE X-200RNA Switch Devices Denial of Service (DoS) Multiple Vulnerabilities (ICSA-22-349-21, SSA-412672)"}]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"cve@mitre.org","ID":"CVE-2015-5600","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"n/a","version":{"version_data":[{"version_value":"n/a"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","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."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"name":"http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html","refsource":"CONFIRM","url":"http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html"},{"name":"USN-2710-2","refsource":"UBUNTU","url":"http://www.ubuntu.com/usn/USN-2710-2"},{"name":"FEDORA-2015-13469","refsource":"FEDORA","url":"http://lists.fedoraproject.org/pipermail/package-announce/2015-August/165170.html"},{"name":"http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html","refsource":"CONFIRM","url":"http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html"},{"name":"https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05157667","refsource":"CONFIRM","url":"https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05157667"},{"name":"https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05128992","refsource":"CONFIRM","url":"https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05128992"},{"name":"http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html","refsource":"CONFIRM","url":"http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html"},{"name":"http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html","refsource":"CONFIRM","url":"http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html"},{"name":"GLSA-201512-04","refsource":"GENTOO","url":"https://security.gentoo.org/glsa/201512-04"},{"name":"https://kc.mcafee.com/corporate/index?page=content&id=SB10136","refsource":"CONFIRM","url":"https://kc.mcafee.com/corporate/index?page=content&id=SB10136"},{"name":"https://security.netapp.com/advisory/ntap-20151106-0001/","refsource":"CONFIRM","url":"https://security.netapp.com/advisory/ntap-20151106-0001/"},{"name":"RHSA-2016:0466","refsource":"REDHAT","url":"http://rhn.redhat.com/errata/RHSA-2016-0466.html"},{"name":"http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/auth2-chall.c.diff?r1=1.42&r2=1.43&f=h","refsource":"CONFIRM","url":"http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/auth2-chall.c.diff?r1=1.42&r2=1.43&f=h"},{"name":"http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html","refsource":"CONFIRM","url":"http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html"},{"name":"http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10697","refsource":"CONFIRM","url":"http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10697"},{"name":"APPLE-SA-2015-08-13-2","refsource":"APPLE","url":"http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html"},{"name":"http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/auth2-chall.c","refsource":"CONFIRM","url":"http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/auth2-chall.c"},{"name":"https://kc.mcafee.com/corporate/index?page=content&id=SB10157","refsource":"CONFIRM","url":"https://kc.mcafee.com/corporate/index?page=content&id=SB10157"},{"name":"75990","refsource":"BID","url":"http://www.securityfocus.com/bid/75990"},{"name":"91787","refsource":"BID","url":"http://www.securityfocus.com/bid/91787"},{"name":"https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04952480","refsource":"CONFIRM","url":"https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04952480"},{"name":"SUSE-SU-2015:1581","refsource":"SUSE","url":"http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00017.html"},{"name":"92012","refsource":"BID","url":"http://www.securityfocus.com/bid/92012"},{"name":"https://support.apple.com/kb/HT205031","refsource":"CONFIRM","url":"https://support.apple.com/kb/HT205031"},{"name":"[debian-lts-announce] 20180910 [SECURITY] [DLA 1500-1] openssh security update","refsource":"MLIST","url":"https://lists.debian.org/debian-lts-announce/2018/09/msg00010.html"},{"name":"[oss-security] 20150723 Re: CVE Request for OpenSSH vulnerability - authentication limits bypass","refsource":"MLIST","url":"http://openwall.com/lists/oss-security/2015/07/23/4"},{"name":"USN-2710-1","refsource":"UBUNTU","url":"http://www.ubuntu.com/usn/USN-2710-1"},{"name":"FEDORA-2015-11981","refsource":"FEDORA","url":"http://lists.fedoraproject.org/pipermail/package-announce/2015-July/162955.html"},{"name":"1032988","refsource":"SECTRACK","url":"http://www.securitytracker.com/id/1032988"},{"name":"20150717 OpenSSH keyboard-interactive authentication brute force vulnerability (MaxAuthTries bypass)","refsource":"FULLDISC","url":"http://seclists.org/fulldisclosure/2015/Jul/92"},{"name":"http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html","refsource":"CONFIRM","url":"http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html"},{"refsource":"MISC","name":"https://www.arista.com/en/support/advisories-notices/security-advisories/1174-security-advisory-12","url":"https://www.arista.com/en/support/advisories-notices/security-advisories/1174-security-advisory-12"},{"refsource":"CONFIRM","name":"https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf","url":"https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf"}]}},"nvd":{"publishedDate":"2015-08-03 01:59:00","lastModifiedDate":"2022-12-13 12:15:00","problem_types":["CWE-264"],"metrics":{"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:P/I:N/A:C","accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"NONE","availabilityImpact":"COMPLETE","baseScore":8.5},"severity":"HIGH","exploitabilityScore":10,"impactScore":7.8,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*","versionEndIncluding":"6.9","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2015","CveId":"5600","Ordinal":"82596","Title":"CVE-2015-5600","CVE":"CVE-2015-5600","Year":"2015"},"notes":[{"CveYear":"2015","CveId":"5600","Ordinal":"1","NoteData":"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.","Type":"Description","Title":null},{"CveYear":"2015","CveId":"5600","Ordinal":"2","NoteData":"2015-08-02","Type":"Other","Title":"Published"},{"CveYear":"2015","CveId":"5600","Ordinal":"3","NoteData":"2021-11-05","Type":"Other","Title":"Modified"}]}}}