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

medium Nessus Plugin ID 117651


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VPR Score: 3.6


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: Medium

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: Medium

VPR Score: 3.6

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: 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: cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*, p-cpe:2.3:a:freebsd:freebsd:asterisk13:*:*:*:*:*:*:*, p-cpe:2.3:a:freebsd:freebsd:asterisk15:*:*:*:*:*:*:*

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