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CVE-2015-5600

Date: August 2, 2015

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.

Language: C

Severity Score

8.2

Related Resources (37)

Url: http://lists.fedoraproject.org/pipermail/package-announce/2015-August/165170.html

Url: https://kc.mcafee.com/corporate/index?page=content&id=SB10136

Url: https://kc.mcafee.com/corporate/index?page=content&id=SB10157

Url: http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html

Url: https://security-tracker.debian.org/tracker/CVE-2015-5600

Url: http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10697

Url: http://openwall.com/lists/oss-security/2015/07/23/4

Url: http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html

Url: https://www.arista.com/en/support/advisories-notices/security-advisories/1174-security-advisory-12

Url: http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html

Url: https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04952480

Url: https://support.apple.com/kb/HT205031

Url: https://security.netapp.com/advisory/ntap-20151106-0001/

Url: http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html

Url: https://lists.debian.org/debian-lts-announce/2018/09/msg00010.html

Url: https://security.gentoo.org/glsa/201512-04

Url: https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf

Url: http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html

Url: https://access.redhat.com/security/cve/CVE-2015-5600

Url: http://www.securityfocus.com/bid/91787

Url: http://seclists.org/fulldisclosure/2015/Jul/92

Url: http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html

Url: http://www.ubuntu.com/usn/USN-2710-2

Url: http://www.ubuntu.com/usn/USN-2710-1

Url: http://www.securityfocus.com/bid/92012

Url: http://www.securitytracker.com/id/1032988

Url: http://www.securityfocus.com/bid/75990

Url: http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00017.html

Url: https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05157667

Url: http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html

Url: http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/auth2-chall.c

Url: https://nvd.nist.gov/vuln/detail/CVE-2015-5600

Url: https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05128992

Url: http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/auth2-chall.c.diff?r1=1.42&r2=1.43&f=h

Url: http://rhn.redhat.com/errata/RHSA-2016-0466.html

Url: http://lists.fedoraproject.org/pipermail/package-announce/2015-July/162955.html

Url: https://www.mend.io/vulnerability-database/CVE-2015-5600

Severity Score

8.2

Weakness Type (CWE)

Permissions, Privileges, and Access Control

CWE-264

CVSS v3.1

Base Score:	8.2
Attack Vector (AV):	NETWORK
Attack Complexity (AC):	LOW
Privileges Required (PR):	NONE
User Interaction (UI):	NONE
Scope (S):	UNCHANGED
Confidentiality (C):	LOW
Integrity (I):	NONE
Availability (A):	HIGH

CVSS v2

Base Score:	8.5
Access Vector (AV):	NETWORK
Access Complexity (AC):	LOW
Authentication (AU):	NONE
Confidentiality (C):	PARTIAL
Integrity (I):	NONE
Availability (A):	COMPLETE
Additional information:

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CVE-2015-5600

Date: August 2, 2015

Language: C

Severity Score

Related Resources (37)

Severity Score

Weakness Type (CWE)

CVSS v3.1

CVSS v2

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