MEDIUM
There is a stack consumption vulnerability in the res_http_websocket.so module of Asterisk through 13.23.0, 14.7.x through 14.7.7, and 15.x through 15.6.0 and Certified Asterisk through 13.21-cert2. It allows an attacker to crash Asterisk via a specially crafted HTTP request to upgrade the connection to a websocket.
http://downloads.asterisk.org/pub/security/AST-2018-009.html
http://packetstormsecurity.com/files/149453/Asterisk-Project-Security-Advisory-AST-2018-009.html
http://seclists.org/fulldisclosure/2018/Sep/31
http://www.securityfocus.com/bid/105389
http://www.securitytracker.com/id/1041694
https://issues.asterisk.org/jira/browse/ASTERISK-28013
https://lists.debian.org/debian-lts-announce/2018/09/msg00034.html
https://seclists.org/bugtraq/2018/Sep/53
Source: MITRE
Published: 2018-09-24
Updated: 2019-10-03
Type: CWE-400
Base Score: 5
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P
Impact Score: 2.9
Exploitability Score: 10
Severity: MEDIUM
Base Score: 7.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Impact Score: 3.6
Exploitability Score: 3.9
Severity: HIGH