CVE-2016-8858

Severity

78%

Complexity

99%

Confidentiality

115%

** DISPUTED ** 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."

** DISPUTED ** 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."

CVSS 3.0 Base Score 7.5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

CVSS 2.0 Base Score 7.8. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:C).

Overview

Type

OpenBSD OpenSSH

First reported 8 years ago

2016-12-09 11:59:00

Last updated 6 years ago

2018-09-19 20:02:00

Affected Software

OpenBSD OpenSSH 6.8

6.8

OpenBSD OpenSSH 6.9

6.9

OpenBSD OpenSSH 7.0

7.0

OpenBSD OpenSSH 7.1

7.1

OpenBSD OpenSSH 7.3

7.3

References

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

Issue Tracking, Vendor Advisory

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

Issue Tracking, Vendor Advisory

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

Mailing List, Third Party Advisory

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

Mailing List, Third Party Advisory

93776

Third Party Advisory, VDB Entry

1037057

Third Party Advisory, VDB Entry

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

Issue Tracking

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

Patch, Vendor Advisory

https://github.com/dag-erling/kexkill/issues/1

Third Party Advisory

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

Issue Tracking, Patch, Third Party Advisory

FreeBSD-SA-16:33

Third Party Advisory

GLSA-201612-18

Third Party Advisory

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

Third Party Advisory

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