CVE-2017-17850

Published: Dec 27, 2017Modified: May 13, 2026

7.5

Vector

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

Exploitability: 3.9 / Impact: 3.6

Source: NVD

Description

An issue was discovered in Asterisk 13.18.4 and older, 14.7.4 and older, 15.1.4 and older, and 13.18-cert1 and older. A select set of SIP messages create a dialog in Asterisk. Those SIP messages must contain a contact header. For those messages, if the header was not present and the PJSIP channel driver was used, Asterisk would crash. The severity of this vulnerability is somewhat mitigated if authentication is enabled. If authentication is enabled, a user would have to first be authorized before reaching the crash point.

Affected (7)

Products: Digium: Asterisk, Certified Asterisk

Digium

2 products

Asterisk

Certified Asterisk

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Digium Asterisk	From 13.0.0 to 13.18.4

Configuration B

1 vulnerable

Vulnerable Software	Affected Versions
Digium Asterisk	From 14.0.0 to 14.7.4

Configuration C

1 vulnerable

Vulnerable Software	Affected Versions
Digium Asterisk	From 15.0.0 to 15.1.4

Configuration D

4 vulnerable

Vulnerable Software	Affected Versions
Digium Certified Asterisk	Version 13.1.0
Digium Certified Asterisk	Version 13.1.0 rc1
Digium Certified Asterisk	Version 13.1.0 rc2
Digium Certified Asterisk	Version 13.8 cert1