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Vulnerability Details : CVE-2016-8858

** 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."
Publish Date : 2016-12-09 Last Update Date : 2018-09-19
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- CVSS Scores & Vulnerability Types

CVSS Score
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of Service
CWE ID 399

- Products Affected By CVE-2016-8858

# Product Type Vendor Product Version Update Edition Language
1 Application Openbsd Openssh 6.8 Version Details Vulnerabilities
2 Application Openbsd Openssh 6.9 Version Details Vulnerabilities
3 Application Openbsd Openssh 7.0 Version Details Vulnerabilities
4 Application Openbsd Openssh 7.1 Version Details Vulnerabilities
5 Application Openbsd Openssh 7.2 Version Details Vulnerabilities
6 Application Openbsd Openssh 7.3 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Openbsd Openssh 6

- References For CVE-2016-8858
BID 93776 OpenSSH 'ssh/kex.c' Denial of Service Vulnerability Release Date:2017-02-11
GENTOO GLSA-201612-18
MLIST [oss-security] 20161019 CVE Request: OpenSSH: Memory exhaustion issue found in OpenSSH
MLIST [oss-security] 20161020 Re: Re: CVE Request: OpenSSH: Memory exhaustion issue found in OpenSSH CONFIRM
SECTRACK 1037057

- Metasploit Modules Related To CVE-2016-8858

There are not any metasploit modules related to this CVE entry (Please visit for more information)

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