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CVE-2016-8858

Published: Dec 9, 2016

Modified: May 29, 2026

PUBLISHED

Description

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."

Vendor	Product	Versions
n/a	n/a	affected `n/a`

References

vdb-entry

[oss-security] 20161020 Re: Re: CVE Request: OpenSSH: Memory exhaustion issue found in OpenSSH

mailing-list

https://security.netapp.com/advisory/ntap-20180201-0001/

[oss-security] 20161019 CVE Request: OpenSSH: Memory exhaustion issue found in OpenSSH

mailing-list

http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/kex.c.diff?r1=1.126&r2=1.127&f=h

https://github.com/openssh/openssh-portable/commit/ec165c392ca54317dbe3064a8c200de6531e89ad

https://ftp.openbsd.org/pub/OpenBSD/patches/6.0/common/013_ssh_kexinit.patch.sig

FreeBSD-SA-16:33

vendor-advisory

vdb-entry

vendor-advisory

https://bugzilla.redhat.com/show_bug.cgi?id=1384860

http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/kex.c?rev=1.127&content-type=text/x-cvsweb-markup

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

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