National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2016-9937 Detail

Current 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.

Source:  MITRE
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 7.5 HIGH
Vector: AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H (V3.0 legend)
Impact Score: 3.6
Exploitability Score: 3.9


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

CVSS v2.0 Severity and Metrics:

Base Score: 5.0 MEDIUM
Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:P) (V2 legend)
Impact Subscore: 2.9
Exploitability Subscore: 10.0


Access Vector (AV): Network
Access Complexity (AC): Insufficient_Info
Authentication (AU): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Partial
Additional Information:
Allows disruption of service

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to nvd@nist.gov.

Hyperlink Resource
http://downloads.asterisk.org/pub/security/AST-2016-008.html 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://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

Technical Details

Vulnerability Type (View All)

  • Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119)

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:digium:asterisk:13.12:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:digium:asterisk:13.13:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:digium:asterisk:14.0:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:digium:asterisk:14.01:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:digium:asterisk:14.1:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:digium:asterisk:14.1.1:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:digium:asterisk:14.1.2:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:digium:asterisk:14.02:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:digium:asterisk:14.2:*:*:*:*:*:*:*
     Show Matching CPE(s)


Change History

4 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2016-9937
NVD Published Date:
12/12/2016
NVD Last Modified:
07/26/2017