FreeBSD : FreeBSD -- OpenSSH Denial of Service vulnerability (6ed5c5e3-a840-11e7-b5af-a4badb2f4699)

High Nessus Plugin ID 103657


The remote FreeBSD host is missing one or more security-related updates.


There is no limit on the password length. Impact : A remote attacker may be able to cause an affected SSH server to use excessive amount of CPU by sending very long passwords, when PasswordAuthentication is enabled by the system administrator.


Update the affected packages.

See Also

Plugin Details

Severity: High

ID: 103657

File Name: freebsd_pkg_6ed5c5e3a84011e7b5afa4badb2f4699.nasl

Version: 3.3

Type: local

Published: 2017/10/04

Updated: 2019/04/10

Dependencies: 12634

Configuration: Enable paranoid mode

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.8

Temporal Score: 6.1

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Temporal Vector: CVSS2#E:POC/RL:OF/RC:C

CVSS v3.0

Base Score: 7.5

Temporal Score: 6.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:FreeBSD, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info, Settings/ParanoidReport

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2017/10/03

Vulnerability Publication Date: 2017/08/10

Reference Information

CVE: CVE-2016-6515

FreeBSD: SA-17:06.openssh