FreeBSD : FreeBSD -- Resource exhaustion in TCP reassembly (3c2eea8c-99bf-11e8-8bee-a4badb2f4699)

High Nessus Plugin ID 111561

Synopsis

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

Description

One of the data structures that holds TCP segments uses an inefficient algorithm to reassemble the data. This causes the CPU time spent on segment processing to grow linearly with the number of segments in the reassembly queue. Impact : An attacker who has the ability to send TCP traffic to a victim system can degrade the victim system's network performance and/or consume excessive CPU by exploiting the inefficiency of TCP reassembly handling, with relatively small bandwidth cost.

Solution

Update the affected packages.

See Also

http://www.nessus.org/u?536d1d4f

Plugin Details

Severity: High

ID: 111561

File Name: freebsd_pkg_3c2eea8c99bf11e88beea4badb2f4699.nasl

Version: 1.2

Type: local

Published: 2018/08/07

Modified: 2018/08/16

Dependencies: 12634

Risk Information

Risk Factor: High

Vulnerability Information

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

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

Patch Publication Date: 2018/08/06

Vulnerability Publication Date: 2018/08/06

Reference Information

CVE: CVE-2018-6922

FreeBSD: SA-18:08.tcp

IAVA: 2018-A-0254