CVE-2016-9937 : 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 off

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.

Published 2016-12-12 21:59:00

Updated 2017-07-27 01:29:07

Source MITRE

View at NVD, CVE.org

Vulnerability category: Overflow

Threat overview for CVE-2016-9937

Top countries where our scanners detected CVE-2016-9937

Top open port discovered on systems with this issue 443

IPs affected by CVE-2016-9937 119

Threat actors abusing to this issue? Yes

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Exploit prediction scoring system (EPSS) score for CVE-2016-9937

EPSS FAQ

1.37%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 84 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2016-9937

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:N/I:N/A:P	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
7.5	HIGH	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	3.9	3.6	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2016-9937

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

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2016-9937

Products affected by CVE-2016-9937