FreeBSD : asterisk -- Remote crash vulnerability in HTTP websocket upgrade (77f67b46-bd75-11e8-81b6-001999f8d30b)

high Nessus Plugin ID 117651


New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.


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


The Asterisk project reports :

There is a stack overflow vulnerability in the module of Asterisk that allows an attacker to crash Asterisk via a specially crafted HTTP request to upgrade the connection to a websocket. The attackers request causes Asterisk to run out of stack space and crash.

As a workaround disable HTTP websocket access by not loading the module.


Update the affected packages.

See Also

Plugin Details

Severity: High

ID: 117651

File Name: freebsd_pkg_77f67b46bd7511e881b6001999f8d30b.nasl

Version: 1.3

Type: local

Published: 9/24/2018

Updated: 12/21/2018

Dependencies: ssh_get_info.nasl

Risk Information


Risk Factor: Low

Score: 3.6


Risk Factor: Medium

Base Score: 5

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


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:asterisk13, p-cpe:/a:freebsd:freebsd:asterisk15, cpe:/o:freebsd:freebsd

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

Patch Publication Date: 9/21/2018

Vulnerability Publication Date: 8/16/2018

Reference Information

CVE: CVE-2018-17281