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7.5
HIGH CVSS 3.0
CVE-2016-9937
Asterisk Opus Codec Parsing Remote Code Execution Vulnerability
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.

INFO

Published Date :

Dec. 12, 2016, 9:59 p.m.

Last Modified :

April 12, 2025, 10:46 a.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Affected Products

The following products are affected by CVE-2016-9937 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Digium asterisk
: Total Affected Vendor : 1 | Products : 1
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 2.0 MEDIUM [email protected]
CVSS 3.0 HIGH [email protected]
Solution
This information is provided by the 3rd party feeds.
  • Upgrade to Asterisk version 13.13.1 / 14.2.1 or later.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2016-9937.

URL Resource
http://downloads.asterisk.org/pub/security/AST-2016-008-13.diff Patch Vendor Advisory
http://downloads.asterisk.org/pub/security/AST-2016-008-14.diff Patch Vendor Advisory
http://downloads.asterisk.org/pub/security/AST-2016-008.html Patch Vendor Advisory
http://www.securityfocus.com/bid/94792 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1037407
https://issues.asterisk.org/jira/browse/ASTERISK-26579 Patch Vendor Advisory
http://downloads.asterisk.org/pub/security/AST-2016-008-13.diff Patch Vendor Advisory
http://downloads.asterisk.org/pub/security/AST-2016-008-14.diff Patch Vendor Advisory
http://downloads.asterisk.org/pub/security/AST-2016-008.html Patch Vendor Advisory
http://www.securityfocus.com/bid/94792 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1037407
https://issues.asterisk.org/jira/browse/ASTERISK-26579 Patch Vendor Advisory
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2016-9937 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2016-9937 weaknesses.

CAPEC-8: Buffer Overflow in an API Call Buffer Overflow in an API Call CAPEC-9: Buffer Overflow in Local Command-Line Utilities Buffer Overflow in Local Command-Line Utilities CAPEC-10: Buffer Overflow via Environment Variables Buffer Overflow via Environment Variables CAPEC-14: Client-side Injection-induced Buffer Overflow Client-side Injection-induced Buffer Overflow CAPEC-24: Filter Failure through Buffer Overflow Filter Failure through Buffer Overflow CAPEC-42: MIME Conversion MIME Conversion CAPEC-44: Overflow Binary Resource File Overflow Binary Resource File CAPEC-45: Buffer Overflow via Symbolic Links Buffer Overflow via Symbolic Links CAPEC-46: Overflow Variables and Tags Overflow Variables and Tags CAPEC-47: Buffer Overflow via Parameter Expansion Buffer Overflow via Parameter Expansion CAPEC-100: Overflow Buffers Overflow Buffers CAPEC-123: Buffer Manipulation Buffer Manipulation

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2016-9937 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2016-9937 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference http://downloads.asterisk.org/pub/security/AST-2016-008.html
    Added Reference http://downloads.asterisk.org/pub/security/AST-2016-008-13.diff
    Added Reference http://downloads.asterisk.org/pub/security/AST-2016-008-14.diff
    Added Reference http://www.securityfocus.com/bid/94792
    Added Reference http://www.securitytracker.com/id/1037407
    Added Reference https://issues.asterisk.org/jira/browse/ASTERISK-26579
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Jul. 27, 2017

    Action Type Old Value New Value
    Added Reference http://www.securitytracker.com/id/1037407 [No Types Assigned]
  • Reanalysis by [email protected]

    Jan. 03, 2017

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:asterisk:opensource:13.12:*:*:*:*:*:*:* *cpe:2.3:a:asterisk:opensource:13.13:*:*:*:*:*:*:* *cpe:2.3:a:asterisk:opensource:14.0:*:*:*:*:*:*:* *cpe:2.3:a:asterisk:opensource:14.01:*:*:*:*:*:*:* *cpe:2.3:a:asterisk:opensource:14.02:*:*:*:*:*:*:* *cpe:2.3:a:asterisk:opensource:14.1:*:*:*:*:*:*:* *cpe:2.3:a:asterisk:opensource:14.1.1:*:*:*:*:*:*:* *cpe:2.3:a:asterisk:opensource:14.1.2:*:*:*:*:*:*:* *cpe:2.3:a:asterisk:opensource:14.2:*:*:*:*:*:*:* OR *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:14.01:*:*:*:*:*:*:* *cpe:2.3:a:digium:asterisk:14.02:*:*:*:*:*:*:* *cpe:2.3:a:digium:asterisk:14.1:*:*:*:*:*:*:* *cpe:2.3:a:digium:asterisk:14.1.1:*:*:*:*:*:*:* *cpe:2.3:a:digium:asterisk:14.1.2:*:*:*:*:*:*:* *cpe:2.3:a:digium:asterisk:14.2:*:*:*:*:*:*:*
  • Initial Analysis by [email protected]

    Dec. 22, 2016

    Action Type Old Value New Value
    Added CVSS V2 (AV:N/AC:L/Au:N/C:N/I:N/A:P)
    Added CVSS V3 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Changed Reference Type https://issues.asterisk.org/jira/browse/ASTERISK-26579 No Types Assigned https://issues.asterisk.org/jira/browse/ASTERISK-26579 Vendor Advisory, Patch
    Changed Reference Type http://downloads.asterisk.org/pub/security/AST-2016-008-13.diff No Types Assigned http://downloads.asterisk.org/pub/security/AST-2016-008-13.diff Vendor Advisory, Patch
    Changed Reference Type http://downloads.asterisk.org/pub/security/AST-2016-008-14.diff No Types Assigned http://downloads.asterisk.org/pub/security/AST-2016-008-14.diff Vendor Advisory, Patch
    Changed Reference Type http://www.securityfocus.com/bid/94792 No Types Assigned http://www.securityfocus.com/bid/94792 Third Party Advisory, VDB Entry
    Changed Reference Type http://downloads.asterisk.org/pub/security/AST-2016-008.html No Types Assigned http://downloads.asterisk.org/pub/security/AST-2016-008.html Vendor Advisory, Patch
    Added CWE CWE-119
    Added CPE Configuration OR *cpe:2.3:a:asterisk:opensource:13.12:*:*:*:*:*:*:* *cpe:2.3:a:asterisk:opensource:13.13:*:*:*:*:*:*:* *cpe:2.3:a:asterisk:opensource:14.0:*:*:*:*:*:*:* *cpe:2.3:a:asterisk:opensource:14.01:*:*:*:*:*:*:* *cpe:2.3:a:asterisk:opensource:14.02:*:*:*:*:*:*:* *cpe:2.3:a:asterisk:opensource:14.1:*:*:*:*:*:*:* *cpe:2.3:a:asterisk:opensource:14.1.1:*:*:*:*:*:*:* *cpe:2.3:a:asterisk:opensource:14.1.2:*:*:*:*:*:*:* *cpe:2.3:a:asterisk:opensource:14.2:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Dec. 16, 2016

    Action Type Old Value New Value
    Added Reference http://www.securityfocus.com/bid/94792 [No Types Assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 7.5
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact
Base CVSS Score: 5
Access Vector
Access Complexity
Authentication
Confidentiality Impact
Integrity Impact
Availability Impact
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.34 }} 0.04%

score

0.56293

percentile