CVE-2015-5600
HIGHEPSS 95th pctlDescription
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.
How to fix
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploit Intelligence
High risk: more likely to be exploited than 95% of all known CVEs.
References
- cvsweb.openbsd.org
- cvsweb.openbsd.org
- kb.juniper.net
- lists.apple.com
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.opensuse.org
- openwall.com
- rhn.redhat.com
- oracle.com
- oracle.com
- oracle.com
- oracle.com
- oracle.com
- oracle.com
- securityfocus.com
- securityfocus.com
- securityfocus.com
- securitytracker.com
- ubuntu.com
- ubuntu.com
- cert-portal.siemens.com
- h20564.www2.hpe.com
- h20566.www2.hpe.com
- h20566.www2.hpe.com
- kc.mcafee.com
- kc.mcafee.com
- lists.debian.org
- security.gentoo.org
- security.netapp.com
- support.apple.com
- arista.com
Related Vulnerabilities
Other CWE-264 (Permissions, Privileges, and Access Controls) vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2012-1456 | Medium | 4.3 | 100% | - | - |
| CVE-2012-1459 | Medium | 4.3 | 100% | - | Fix |
| CVE-2012-1446 | Medium | 4.3 | 100% | - | - |
| CVE-2012-1443 | Medium | 4.3 | 100% | - | - |
| CVE-2012-1442 | Medium | 4.3 | 99% | - | - |
| CVE-2012-1457 | Medium | 4.3 | 98% | - | Fix |
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Start freeThis product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-27.