CVE-2016-8858

Descripción original

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."

Software afectado

• OpenSSH = 6.8= 7.0= 7.1= 6.9= 7.2= 7.3 coincidencia exacta

Detalles

Publicación

2016-12-09

Última modificación

2026-06-17

Vector CVSS

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-399, CWE-400

Referencias

• cve.org/CVE-2016-8858
• nvd.nist.gov/vuln/detail/CVE-2016-8858
• cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/kex.c.diff?r1=1.126&r2=1.127&f=h
• cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/kex.c?rev=1.127&content-type=text/x-cvsw...
• www.openwall.com/lists/oss-security/2016/10/19/3
• www.openwall.com/lists/oss-security/2016/10/20/1
• www.securityfocus.com/bid/93776
• www.securitytracker.com/id/1037057
• bugzilla.redhat.com/show_bug.cgi?id=1384860
• cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
• ftp.openbsd.org/pub/OpenBSD/patches/6.0/common/013_ssh_kexinit.patch.sig
• github.com/openssh/openssh-portable/commit/ec165c392ca54317dbe3064a8c200de6531e89ad
• security.FreeBSD.org/advisories/FreeBSD-SA-16:33.openssh.asc
• security.gentoo.org/glsa/201612-18