CVE-2015-5600 (GCVE-0-2015-5600)

Vulnerability from cvelistv5 – Published: 2015-08-03 00:00 – Updated: 2026-05-27 16:31
VLAI
Summary
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.
Severity
8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-27 16:31 UTC
CWE
  • n/a
  • CWE-400 - Uncontrolled Resource Consumption
Assigner
mitre CNA under the mitre root
CNA scorecard E 28/100 over 2319 records in the last 180 days details
References
URL Tags
http://www.oracle.com/technetwork/topics/security…
http://www.ubuntu.com/usn/USN-2710-2 vendor-advisory
http://lists.fedoraproject.org/pipermail/package-… vendor-advisory
http://www.oracle.com/technetwork/security-adviso…
https://h20566.www2.hpe.com/portal/site/hpsc/publ…
https://h20566.www2.hpe.com/portal/site/hpsc/publ…
http://www.oracle.com/technetwork/topics/security…
http://www.oracle.com/technetwork/security-adviso…
https://security.gentoo.org/glsa/201512-04 vendor-advisory
https://kc.mcafee.com/corporate/index?page=conten…
https://security.netapp.com/advisory/ntap-2015110…
http://rhn.redhat.com/errata/RHSA-2016-0466.html vendor-advisory
http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.…
http://www.oracle.com/technetwork/topics/security…
http://kb.juniper.net/InfoCenter/index?page=conte…
http://lists.apple.com/archives/security-announce… vendor-advisory
http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.…
https://kc.mcafee.com/corporate/index?page=conten…
http://www.securityfocus.com/bid/75990 vdb-entry
http://www.securityfocus.com/bid/91787 vdb-entry
https://h20564.www2.hpe.com/portal/site/hpsc/publ…
http://lists.opensuse.org/opensuse-security-annou… vendor-advisory
http://www.securityfocus.com/bid/92012 vdb-entry
https://support.apple.com/kb/HT205031
https://lists.debian.org/debian-lts-announce/2018… mailing-list
http://openwall.com/lists/oss-security/2015/07/23/4 mailing-list
http://www.ubuntu.com/usn/USN-2710-1 vendor-advisory
http://lists.fedoraproject.org/pipermail/package-… vendor-advisory
http://www.securitytracker.com/id/1032988 vdb-entry
http://seclists.org/fulldisclosure/2015/Jul/92 mailing-list
http://www.oracle.com/technetwork/topics/security…
https://www.arista.com/en/support/advisories-noti…
https://cert-portal.siemens.com/productcert/pdf/s…
Date Public
2015-07-17 00:00
Show details on NVD website
To clipboard 

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            {
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            {
              "url": "https://support.apple.com/kb/HT205031"
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            {
              "name": "[debian-lts-announce] 20180910 [SECURITY] [DLA 1500-1] openssh security update",
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              "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",
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              "url": "http://openwall.com/lists/oss-security/2015/07/23/4"
            },
            {
              "name": "USN-2710-1",
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            {
              "name": "FEDORA-2015-11981",
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            {
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            {
              "name": "20150717 OpenSSH keyboard-interactive authentication brute force vulnerability (MaxAuthTries bypass)",
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              "url": "http://seclists.org/fulldisclosure/2015/Jul/92"
            },
            {
              "url": "http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html"
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            {
              "url": "https://www.arista.com/en/support/advisories-notices/security-advisories/1174-security-advisory-12"
            },
            {
              "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf"
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      },
      "cveMetadata": {
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        "assignerShortName": "mitre",
        "cveId": "CVE-2015-5600",
        "datePublished": "2015-08-03T00:00:00.000Z",
        "dateReserved": "2015-07-20T00:00:00.000Z",
        "dateUpdated": "2026-05-27T16:31:51.246Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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