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Vulnerability details: VCID-1zf7-mk5n-aaae
Vulnerability ID VCID-1zf7-mk5n-aaae
Aliases CVE-2016-8858
Summary ** 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."
Status Disputed
Exploitability 0.5
Weighted Severity 7.0
Risk 3.5
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-399 Resource Management Errors
System Score Found at
cvssv3 5.8 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2016-8858.json
epss 0.43375 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.43375 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.43375 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.43375 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.48534 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.48534 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.5495 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.59475 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.59475 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.59475 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.59475 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.59475 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.59475 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.59475 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.59475 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.59475 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.59475 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.59475 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.59475 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.59475 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.59475 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.59475 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.59475 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.59475 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.59475 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.59475 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.59475 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.59475 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.59475 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.59475 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.59475 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.60007 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.60007 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.60007 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.67214 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.78351 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.78351 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.78351 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.78351 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.78351 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.78351 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.78351 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.78351 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.78351 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
epss 0.78351 https://api.first.org/data/v1/epss?cve=CVE-2016-8858
rhbs medium https://bugzilla.redhat.com/show_bug.cgi?id=1384860
cvssv3.1 5.8 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 7.8 https://nvd.nist.gov/vuln/detail/CVE-2016-8858
cvssv3 7.5 https://nvd.nist.gov/vuln/detail/CVE-2016-8858
Reference id Reference type URL
http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/kex.c.diff?r1=1.126&r2=1.127&f=h
http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/kex.c?rev=1.127&content-type=text/x-cvsweb-markup
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2016-8858.json
https://api.first.org/data/v1/epss?cve=CVE-2016-8858
https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-8858
https://ftp.openbsd.org/pub/OpenBSD/patches/6.0/common/013_ssh_kexinit.patch.sig
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://github.com/dag-erling/kexkill/issues/1
https://github.com/openssh/openssh-portable/commit/ec165c392ca54317dbe3064a8c200de6531e89ad
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:33.openssh.asc
https://security.gentoo.org/glsa/201612-18
https://security.netapp.com/advisory/ntap-20180201-0001/
http://www.openwall.com/lists/oss-security/2016/10/19/3
http://www.openwall.com/lists/oss-security/2016/10/20/1
http://www.securityfocus.com/bid/93776
http://www.securitytracker.com/id/1037057
1384860 https://bugzilla.redhat.com/show_bug.cgi?id=1384860
841884 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=841884
cpe:2.3:a:openbsd:openssh:6.8:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:openbsd:openssh:6.8:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:6.9:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:openbsd:openssh:6.9:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:7.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:openbsd:openssh:7.0:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:7.1:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:openbsd:openssh:7.1:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:7.2:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:openbsd:openssh:7.2:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:7.3:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:openbsd:openssh:7.3:*:*:*:*:*:*:*
CVE-2016-8858 https://nvd.nist.gov/vuln/detail/CVE-2016-8858
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2016-8858.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C Found at https://nvd.nist.gov/vuln/detail/CVE-2016-8858
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2016-8858
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.97412
EPSS Score 0.43375
Published At Dec. 17, 2024, midnight
Date Actor Action Source VulnerableCode Version
2025-04-16T21:12:44.992357+00:00 NVD CVE Status Improver Improve https://cveawg.mitre.org/api/cve/CVE-2016-8858 36.0.0