CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.5	$0-$5k	0.00

A vulnerability has been found in Digium Asterisk up to 1.8.x/11.21.0/12.x/13.7.0 (Communications System) and classified as problematic. Affected by this vulnerability is the function chan_sip of the file sip.conf of the component Timeout Handler. The manipulation with an unknown input leads to a config vulnerability. The CWE definition for the vulnerability is CWE-16. As an impact it is known to affect availability. The summary by CVE is:

chan_sip in Asterisk Open Source 1.8.x, 11.x before 11.21.1, 12.x, and 13.x before 13.7.1 and Certified Asterisk 1.8.28, 11.6 before 11.6-cert12, and 13.1 before 13.1-cert3, when the timert1 sip.conf configuration is set to a value greater than 1245, allows remote attackers to cause a denial of service (file descriptor consumption) via vectors related to large retransmit timeout values.

The weakness was disclosed 02/22/2016 (Website). It is possible to read the advisory at downloads.asterisk.org. This vulnerability is known as CVE-2016-2316. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1592.004 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 89481 (Fedora 23 : asterisk-13.7.1-1.fc23 (2016-153eed2bb8)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 175868 (Debian Security Update for asterisk (DSA 3700-1)).

Upgrading to version 11.21.1 or 13.7.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (89481). The entries 74686, 81066 and 99926 are pretty similar.

Productinfo

Type

• Communications System

Vendor

• Digium

Name

• Asterisk

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 11.0
• 11.1
• 11.2
• 11.3
• 11.4
• 11.5
• 11.6
• 11.7
• 11.8
• 11.9
• 11.10
• 11.11
• 11.12
• 11.13
• 11.14
• 11.15
• 11.16
• 11.17
• 11.18
• 11.19
• 11.20
• 11.21
• 12.x
• 13.0
• 13.1
• 13.2
• 13.3
• 13.4
• 13.5
• 13.6
• 13.7

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.9
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Config
CWE: CWE-16
ATT&CK: T1592.004

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 89481
Nessus Name: Fedora 23 : asterisk-13.7.1-1.fc23 (2016-153eed2bb8)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 902413
OpenVAS Name: Mageia Linux Local Check: mgasa-2016-0086
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Asterisk 11.21.1/13.7.1

Timelineinfo

02/03/2016 🔍
02/11/2016 +7 days 🔍
02/22/2016 +11 days 🔍
02/22/2016 +0 days 🔍
02/23/2016 +1 days 🔍
03/02/2016 +8 days 🔍
07/08/2022 +2319 days 🔍

Sourcesinfo

Vendor: digium.com

Advisory: FEDORA-2016-153eed2bb8
Status: Not defined

CVE: CVE-2016-2316 (🔍)
OVAL: 🔍

SecurityTracker: 1034930
Vulnerability Center: 56926 - Asterisk Open Source and Certified Asterisk Remote DoS when timert1 sip.conf Configured with Large Values, Medium
SecurityFocus: 82651

See also: 🔍

Entryinfo

Created: 02/23/2016 09:42
Updated: 07/08/2022 12:30
Changes: 02/23/2016 09:42 (42), 12/24/2017 09:38 (26), 07/08/2022 12:14 (5), 07/08/2022 12:22 (11), 07/08/2022 12:30 (1)
Complete: 🔍

Discussion

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