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

high Nessus Plugin ID 103657

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Synopsis

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

Description

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.

Solution

Update the affected packages.

Plugin Details

Severity: High

ID: 103657

File Name: freebsd_pkg_6ed5c5e3a84011e7b5afa4badb2f4699.nasl

Version: 3.4

Type: local

Family: FreeBSD Local Security Checks

Published: 10/4/2017

Updated: 1/4/2021

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

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

CVSS v3

Risk Factor: High

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: 10/3/2017

Vulnerability Publication Date: 8/10/2017

Reference Information

CVE: CVE-2016-6515

FreeBSD: SA-17:06.openssh

Detections

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