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.
4.8	$0-$5k	0.00

A vulnerability was found in Digium Asterisk up to 1.6.1.18 (Communications System). It has been rated as problematic. Affected by this issue is an unknown code block of the file tcptls.c. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. CVE summarizes:

tcptls.c in the TCP/TLS server in Asterisk Open Source 1.6.1.x before 1.6.1.23, 1.6.2.x before 1.6.2.17.1, and 1.8.x before 1.8.3.1 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) by establishing many short TCP sessions to services that use a certain TLS API.

The weakness was presented 03/31/2011 (oss-sec). The advisory is available at openwall.com. This vulnerability is handled as CVE-2011-1175 since 03/03/2011. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit.

It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 52714 (Asterisk Multiple Denial of Service Vulnerabilities (AST-2011-003 / AST-2011-004)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Denial of Service.

Upgrading to version 1.6.1.19 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (66140) and Tenable (52714). See 56977 for similar entry.

Productinfo

Type

• Communications System

Vendor

• Digium

Name

• Asterisk

Version

• 1.6.1.0
• 1.6.1.1
• 1.6.1.2
• 1.6.1.3
• 1.6.1.4
• 1.6.1.5
• 1.6.1.6
• 1.6.1.7
• 1.6.1.8
• 1.6.1.9
• 1.6.1.10
• 1.6.1.11
• 1.6.1.12
• 1.6.1.13
• 1.6.1.14
• 1.6.1.15
• 1.6.1.16
• 1.6.1.17
• 1.6.1.18

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: 5.3
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

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: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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

Nessus ID: 52714
Nessus Name: Asterisk Multiple Denial of Service Vulnerabilities (AST-2011-003 / AST-2011-004)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 69568
OpenVAS Name: Debian Security Advisory DSA 2225-1 (asterisk)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Asterisk 1.6.1.19

Timelineinfo

03/03/2011 🔍
03/16/2011 +13 days 🔍
03/16/2011 +0 days 🔍
03/17/2011 +1 days 🔍
03/20/2011 +3 days 🔍
03/31/2011 +11 days 🔍
03/31/2011 +0 days 🔍
03/20/2015 +1450 days 🔍
10/21/2021 +2407 days 🔍

Sourcesinfo

Vendor: digium.com

Advisory: dsa-2225
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2011-1175 (🔍)
OVAL: 🔍

X-Force: 66140
SecurityTracker: 1025224 - Asterisk TCP/TLS Server Bug Lets Remote Users Deny Service
Vulnerability Center: 30589 - Asterisk Remote Denial of Service when Opening Multiple TCP/TLS Connections, Medium
SecurityFocus: 46898 - Asterisk TCP/TLS Server NULL Pointer Dereference Denial Of Service Vulnerability
Secunia: 43722
Vupen: ADV-2011-0686

See also: 🔍

Entryinfo

Created: 03/20/2015 16:16
Updated: 10/21/2021 15:13
Changes: 03/20/2015 16:16 (60), 03/19/2017 13:32 (17), 10/21/2021 15:03 (3), 10/21/2021 15:06 (1), 10/21/2021 15:13 (2)
Complete: 🔍

Discussion

Might our Artificial Intelligence support you?

Check our Alexa App!