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FreeBSD : FreeBSD -- ipsec crash or denial of service (c0c5afef-38db-11e8-8b7f-a4badb2f469b)

high Nessus Plugin ID 108859

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Synopsis

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

Description

The length field of the option header does not count the size of the option header itself. This causes a problem when the length is zero, the count is then incremented by zero, which causes an infinite loop.

In addition there are pointer/offset mistakes in the handling of IPv4 options. Impact : A remote attacker who is able to send an arbitrary packet, could cause the remote target machine to crash.

Solution

Update the affected packages.

See Also

http://www.nessus.org/u?e1f67d14

Plugin Details

Severity: High

ID: 108859

File Name: freebsd_pkg_c0c5afef38db11e88b7fa4badb2f469b.nasl

Version: 1.7

Type: local

Published: 4/6/2018

Updated: 12/7/2018

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: High

Base Score: 7.8

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

CVSS v3

Risk Factor: High

Base Score: 7.5

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

Vulnerability Information

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

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

Patch Publication Date: 4/5/2018

Vulnerability Publication Date: 4/4/2018

Reference Information

CVE: CVE-2018-6918

FreeBSD: SA-18:05.ipsec