CVE-2016-9937

Severity CVSS v4.0:

Pending analysis

Type:

CWE-119 Buffer Errors

Publication date:

12/12/2016

Last modified:

12/04/2025

Description

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.

Impact

Vector 3.x

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

7.50

Severity 3.x

HIGH

Vector 2.0

AV:N/AC:L/Au:N/C:N/I:N/A:P CVSS v2.0 Severity and Metrics:

Base Score: 5.00 MEDIUM
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Physical

Base Score 2.0

5.00

Severity 2.0

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:digium:asterisk:13.12:::::::*
cpe:2.3:a:digium:asterisk:13.13:::::::*
cpe:2.3:a:digium:asterisk:14.0:::::::*
cpe:2.3:a:digium:asterisk:14.1:::::::*
cpe:2.3:a:digium:asterisk:14.01:::::::*
cpe:2.3:a:digium:asterisk:14.1.1:::::::*
cpe:2.3:a:digium:asterisk:14.1.2:::::::*
cpe:2.3:a:digium:asterisk:14.02:::::::*
cpe:2.3:a:digium:asterisk:14.2:::::::*

To consult the complete list of CPE names with products and versions, see this page

CPE	From	Up to
cpe:2.3:a:digium:asterisk:13.12:::::::*
cpe:2.3:a:digium:asterisk:13.13:::::::*
cpe:2.3:a:digium:asterisk:14.0:::::::*
cpe:2.3:a:digium:asterisk:14.1:::::::*
cpe:2.3:a:digium:asterisk:14.01:::::::*
cpe:2.3:a:digium:asterisk:14.1.1:::::::*
cpe:2.3:a:digium:asterisk:14.1.2:::::::*
cpe:2.3:a:digium:asterisk:14.02:::::::*
cpe:2.3:a:digium:asterisk:14.2:::::::*

CVE-2016-9937

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools