{"id":"CVE-2016-8858","details":"The kex_input_kexinit function in kex.c in OpenSSH 6.x and 7.x through 7.3 allows remote attackers to cause a denial of service (memory consumption) by sending many duplicate KEXINIT requests.  NOTE: a third party reports that \"OpenSSH upstream does not consider this as a security issue.\"","modified":"2026-05-17T11:54:18.641271137Z","published":"2016-12-09T11:59:00.207Z","related":["SUSE-SU-2017:0264-1","SUSE-SU-2017:0603-1","SUSE-SU-2017:0606-1","SUSE-SU-2017:0607-1","SUSE-SU-2017:0607-2","SUSE-SU-2017:0607-3","SUSE-SU-2017:1661-1","openSUSE-SU-2024:11124-1"],"database_specific":{"unresolved_ranges":[{"cpes":["cpe:2.3:a:openbsd:openssh:7.1:*:*:*:*:*:*:*","cpe:2.3:a:openbsd:openssh:7.2:*:*:*:*:*:*:*"],"vendor_product":"openbsd:openssh","source":"CPE_FIELD","extracted_events":[{"last_affected":"7.1"},{"last_affected":"7.2"}]}]},"references":[{"type":"WEB","url":"https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf"},{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2016/10/19/3"},{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2016/10/20/1"},{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/93776"},{"type":"ADVISORY","url":"http://www.securitytracker.com/id/1037057"},{"type":"ADVISORY","url":"https://security.FreeBSD.org/advisories/FreeBSD-SA-16:33.openssh.asc"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/201612-18"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20180201-0001/"},{"type":"REPORT","url":"http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/kex.c.diff?r1=1.126&r2=1.127&f=h"},{"type":"REPORT","url":"http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/kex.c?rev=1.127&content-type=text/x-cvsweb-markup"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1384860"},{"type":"FIX","url":"https://ftp.openbsd.org/pub/OpenBSD/patches/6.0/common/013_ssh_kexinit.patch.sig"},{"type":"FIX","url":"https://github.com/openssh/openssh-portable/commit/ec165c392ca54317dbe3064a8c200de6531e89ad"}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}