CVE-2015-5600

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Summary

CVECVE-2015-5600
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2015-08-03 01:59:03 UTC
Updated2026-05-06 22:30:45 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v2.0 8.5 from [email protected]

AV:N/AC:L/Au:N/C:P/I:N/A:C

Problem Types: CWE-264 | n/a

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
Complete

AV:N/AC:L/Au:N/C:P/I:N/A:C

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Openbsd Openssh All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
USN-2710-1: OpenSSH vulnerabilities | Ubuntu af854a3a-2127-422b-91ae-364da2661108 www.ubuntu.com
Juniper Networks - 2015-10 Security Bulletin: Junos: OpenSSH brute force keyboard interactive MaxAuthTries bypass (CVE-2015-5600) af854a3a-2127-422b-91ae-364da2661108 kb.juniper.net
Arista - Security Advisory 0012 af854a3a-2127-422b-91ae-364da2661108 www.arista.com
APPLE-SA-2015-08-13-2 OS X Yosemite v10.10.5 and Security Update 2015-006 af854a3a-2127-422b-91ae-364da2661108 lists.apple.com
[SECURITY] [DLA 1500-1] openssh security update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
McAfee KnowledgeBase - Intel Security - Security Bulletin: Firewall Enterprise update fixes OpenSSH CVE-2015-5600 and CVE-2015-6564 vulnerabilities af854a3a-2127-422b-91ae-364da2661108 kc.mcafee.com
OpenSSH: Multiple vulnerabilities (GLSA 201512-04) — Gentoo Security af854a3a-2127-422b-91ae-364da2661108 security.gentoo.org
Oracle VM Server for x86 Bulletin - July 2016 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com
Red Hat Customer Portal af854a3a-2127-422b-91ae-364da2661108 rhn.redhat.com
USN-2710-2: OpenSSH regression | Ubuntu af854a3a-2127-422b-91ae-364da2661108 www.ubuntu.com
About the security content of OS X Yosemite v10.10.5 and Security Update 2015-006 - Apple Support af854a3a-2127-422b-91ae-364da2661108 support.apple.com
RETIRED: Oracle Integrated Lights Out Manager CVE-2015-5600 Remote Security Vulnerability af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
[SECURITY] Fedora 21 Update: openssh-6.6.1p1-16.fc21 af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
Oracle Critical Patch Update - July 2016 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com
[SECURITY] Fedora 22 Update: openssh-6.9p1-3.fc22 af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
Document Display | HPE Support Center af854a3a-2127-422b-91ae-364da2661108 h20566.www2.hpe.com
Oracle Solaris Third Party Bulletin - October 2015 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com
Document Display | HPE Support Center af854a3a-2127-422b-91ae-364da2661108 h20564.www2.hpe.com
HPE Support document - HPE Support Center af854a3a-2127-422b-91ae-364da2661108 h20566.www2.hpe.com
OpenSSH Login Handling Security Bypass Weakness af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
[security-announce] SUSE-SU-2015:1581-1: important: Security update for af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org
src/usr.bin/ssh/auth2-chall.c - diff - 1.43 af854a3a-2127-422b-91ae-364da2661108 cvsweb.openbsd.org
cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf af854a3a-2127-422b-91ae-364da2661108 cert-portal.siemens.com
CVE-2015-5600 OpenSSH MaxAuthTries Bypass Vulnerability in NetApp Products | NetApp Product Security af854a3a-2127-422b-91ae-364da2661108 security.netapp.com
OpenSSH 'KbdInteractiveDevices' Lets Remote Users Bypass Security Restrictions on the Target System - SecurityTracker af854a3a-2127-422b-91ae-364da2661108 www.securitytracker.com
Oracle Linux Bulletin - October 2015 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com
Full Disclosure: OpenSSH keyboard-interactive authentication brute force vulnerability (MaxAuthTries bypass) af854a3a-2127-422b-91ae-364da2661108 seclists.org Exploit
CPU July 2018 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com
Oracle Linux Bulletin - April 2016 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com
Oracle July 2016 Critical Patch Update Multiple Vulnerabilities af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
CVS log for src/usr.bin/ssh/auth2-chall.c af854a3a-2127-422b-91ae-364da2661108 cvsweb.openbsd.org
McAfee Security Bulletin: Network Security Virtual Platform update resolves OpenSSH vulnerability that bypasses authentication restrictions defined by MaxAuthTries af854a3a-2127-422b-91ae-364da2661108 kc.mcafee.com
oss-security - Re: CVE Request for OpenSSH vulnerability - authentication limits bypass af854a3a-2127-422b-91ae-364da2661108 openwall.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 591280 Siemens SCALANCE X-200RNA Switch Devices Denial of Service (DoS) Multiple Vulnerabilities (ICSA-22-349-21, SSA-412672)
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