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

Medium Nessus Plugin ID 111561


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


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.


Update the affected packages.

See Also

Plugin Details

Severity: Medium

ID: 111561

File Name: freebsd_pkg_3c2eea8c99bf11e88beea4badb2f4699.nasl

Version: 1.8

Type: local

Published: 2018/08/07

Updated: 2018/12/07

Dependencies: 12634

Configuration: Enable paranoid mode

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 5

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

CVSS v3.0

Base Score: 5.3

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

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

Patch Publication Date: 2018/08/06

Vulnerability Publication Date: 2018/08/06

Reference Information

CVE: CVE-2018-6922

FreeBSD: SA-18:08.tcp