CVE-2016-9937

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 Open Source 13.12.x and 13.13.x before 13.13.1 and 14.x before 14.2.1. If an SDP offer or answer is received with the Opus codec and with the format parameters separated using a space the code responsible for parsing will recursively call itself until it crashes. This occurs as the code does not properly handle spaces separating the parameters. This does NOT require the endpoint to have Opus configured in Asterisk. This also does not require the endpoint to be authenticated. If guest is enabled for chan_sip or anonymous in chan_pjsip an SDP offer or answer is still processed and the crash occurs.

Se descubrió un problema en Asterisk Open Source 13.12.x y 13.13.x en versiones anteriores 13.13.1 y 14.x en versiones anteriores 14.2.1. Si se recibe una prueba o respuesta SDP con el codec Opus y con los parámetros de formato separados usando un espacio de código responsable de análisis llamará a si mismo de forma recursiva hasta que se bloquee. Esto ocurre cuando el código no maneja adecuadamente los espacios que separan los parámetros. Esto NO requiere que el punto final tenga Opus configurado en Asterisk. Esto tampoco requiere que el punto final esté autenticado. Si el invitado está habilitado para chan_sip o anónimo en chan_pjsip una prueba o respuesta SDP se sigue procesando y se produce el bloqueo.

*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

2016-12-12 CVE Reserved
2016-12-12 CVE Published
2023-03-08 EPSS Updated
2024-08-06 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer

CAPEC

References (6)

URL	Tag	Source
http://www.securityfocus.com/bid/94792	Third Party Advisory
http://www.securitytracker.com/id/1037407	Vdb Entry

URL	Date	SRC

URL	Date	SRC
http://downloads.asterisk.org/pub/security/AST-2016-008-13.diff	2017-07-27
http://downloads.asterisk.org/pub/security/AST-2016-008-14.diff	2017-07-27
http://downloads.asterisk.org/pub/security/AST-2016-008.html	2017-07-27
https://issues.asterisk.org/jira/browse/ASTERISK-26579	2017-07-27

URL	Date	SRC

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"				13.12 Search vendor "Digium" for product "Asterisk" and version "13.12"		-		Affected
Digium Search vendor "Digium"		Asterisk Search vendor "Digium" for product "Asterisk"				13.13 Search vendor "Digium" for product "Asterisk" and version "13.13"		-		Affected
Digium Search vendor "Digium"		Asterisk Search vendor "Digium" for product "Asterisk"				14.0 Search vendor "Digium" for product "Asterisk" and version "14.0"		-		Affected
Digium Search vendor "Digium"		Asterisk Search vendor "Digium" for product "Asterisk"				14.1 Search vendor "Digium" for product "Asterisk" and version "14.1"		-		Affected
Digium Search vendor "Digium"		Asterisk Search vendor "Digium" for product "Asterisk"				14.01 Search vendor "Digium" for product "Asterisk" and version "14.01"		-		Affected
Digium Search vendor "Digium"		Asterisk Search vendor "Digium" for product "Asterisk"				14.1.1 Search vendor "Digium" for product "Asterisk" and version "14.1.1"		-		Affected
Digium Search vendor "Digium"		Asterisk Search vendor "Digium" for product "Asterisk"				14.1.2 Search vendor "Digium" for product "Asterisk" and version "14.1.2"		-		Affected
Digium Search vendor "Digium"		Asterisk Search vendor "Digium" for product "Asterisk"				14.02 Search vendor "Digium" for product "Asterisk" and version "14.02"		-		Affected
Digium Search vendor "Digium"		Asterisk Search vendor "Digium" for product "Asterisk"				14.2 Search vendor "Digium" for product "Asterisk" and version "14.2"		-		Affected