CVE-2017-17850

Severity Score

7.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Se ha descubierto un problema en Asterisk en versiones 13.18.4 y anteriores, 14.7.4 y anteriores, 15.1.4 y anteriores y 13.18-cert1 y anteriores. Un conjunto de mensajes SIP seleccionados crean un diálogo en Asterisk. Estos mensajes SIP deben contener una cabecera contact. Para estos mensajes, si la cabecera no estuviera presente y se utilizase el controlador de canal PJSIP, Asterisk se cerraría de forma inesperada. La gravedad de esta vulnerabilidad se mitiga en cierta medida habilitando la autenticación. Si se habilita la autenticación, un usuario tendría que estar autorizado antes de alcanzar el punto de cierre inesperado.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2017-12-22 CVE Reserved
2017-12-23 CVE Published
2023-08-11 EPSS Updated
2024-08-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation

CAPEC

References (4)

URL	Tag	Source
http://www.securitytracker.com/id/1040056	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://downloads.asterisk.org/pub/security/AST-2017-014.html	2018-11-25
https://issues.asterisk.org/jira/browse/ASTERISK-27480	2018-11-25
https://security.gentoo.org/glsa/201811-11	2018-11-25

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Digium Search vendor "Digium"		Asterisk Search vendor "Digium" for product "Asterisk"				>= 13.0.0 <= 13.18.4 Search vendor "Digium" for product "Asterisk" and version " >= 13.0.0 <= 13.18.4"		-		Affected
Digium Search vendor "Digium"		Asterisk Search vendor "Digium" for product "Asterisk"				>= 14.0.0 <= 14.7.4 Search vendor "Digium" for product "Asterisk" and version " >= 14.0.0 <= 14.7.4"		-		Affected
Digium Search vendor "Digium"		Asterisk Search vendor "Digium" for product "Asterisk"				>= 15.0.0 <= 15.1.4 Search vendor "Digium" for product "Asterisk" and version " >= 15.0.0 <= 15.1.4"		-		Affected
Digium Search vendor "Digium"		Certified Asterisk Search vendor "Digium" for product "Certified Asterisk"				13.1.0 Search vendor "Digium" for product "Certified Asterisk" and version "13.1.0"		-		Affected
Digium Search vendor "Digium"		Certified Asterisk Search vendor "Digium" for product "Certified Asterisk"				13.1.0 Search vendor "Digium" for product "Certified Asterisk" and version "13.1.0"		rc1		Affected
Digium Search vendor "Digium"		Certified Asterisk Search vendor "Digium" for product "Certified Asterisk"				13.1.0 Search vendor "Digium" for product "Certified Asterisk" and version "13.1.0"		rc2		Affected
Digium Search vendor "Digium"		Certified Asterisk Search vendor "Digium" for product "Certified Asterisk"				13.8 Search vendor "Digium" for product "Certified Asterisk" and version "13.8"		cert1		Affected