CVE - CVE-2015-5600

CVE-ID
CVE-2015-5600	Learn more at National Vulnerability Database (NVD) • Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
FULLDISC:20150717 OpenSSH keyboard-interactive authentication brute force vulnerability (MaxAuthTries bypass) URL:http://seclists.org/fulldisclosure/2015/Jul/92 MLIST:[oss-security] 20150723 Re: CVE Request for OpenSSH vulnerability - authentication limits bypass URL:http://openwall.com/lists/oss-security/2015/07/23/4 CONFIRM:http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/auth2-chall.c CONFIRM:http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/auth2-chall.c.diff?r1=1.42&r2=1.43&f=h CONFIRM:https://support.apple.com/kb/HT205031 CONFIRM:https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05157667 CONFIRM:http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html CONFIRM:https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05128992 CONFIRM:http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html CONFIRM:http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html CONFIRM:http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html CONFIRM:http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html CONFIRM:https://kc.mcafee.com/corporate/index?page=content&id=SB10157 CONFIRM:https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04952480 CONFIRM:https://kc.mcafee.com/corporate/index?page=content&id=SB10136 CONFIRM:http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10697 CONFIRM:https://security.netapp.com/advisory/ntap-20151106-0001/ APPLE:APPLE-SA-2015-08-13-2 URL:http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html FEDORA:FEDORA-2015-11981 URL:http://lists.fedoraproject.org/pipermail/package-announce/2015-July/162955.html FEDORA:FEDORA-2015-13469 URL:http://lists.fedoraproject.org/pipermail/package-announce/2015-August/165170.html GENTOO:GLSA-201512-04 URL:https://security.gentoo.org/glsa/201512-04 REDHAT:RHSA-2016:0466 URL:http://rhn.redhat.com/errata/RHSA-2016-0466.html SUSE:SUSE-SU-2015:1581 URL:http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00017.html UBUNTU:USN-2710-1 URL:http://www.ubuntu.com/usn/USN-2710-1 UBUNTU:USN-2710-2 URL:http://www.ubuntu.com/usn/USN-2710-2 BID:91787 URL:http://www.securityfocus.com/bid/91787 BID:75990 URL:http://www.securityfocus.com/bid/75990 BID:92012 URL:http://www.securityfocus.com/bid/92012 SECTRACK:1032988 URL:http://www.securitytracker.com/id/1032988
Assigning CNA
N/A
Date Entry Created
20150720	Disclaimer: The entry creation date may reflect when the CVE-ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20150720)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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