Asterisk Multiple Channel Drivers Denial of Service (AST-2011-008 / AST-2011-009 / AST-2011-010)

medium Nessus Plugin ID 55457
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.


A telephony application running on the remote host is affected by multiple denial of service vulnerabilities.


According to the version in its SIP banner, the version of Asterisk running on the remote host is potentially affected by multiple denial of service vulnerabilities :

- If a remote user sends a SIP packet with a NULL, Asterisk reads data past the NULL even though the buffer is actually truncated when copied, which could lead to an application crash. (AST-2011-008)

- A remote user sending a SIP packet containing a Contact header with a missing left angle bracket causes Asterisk to access a NULL pointer, which could cause the application to crash. (AST-2011-009)

- A memory address can be inadvertently transmitted over the network via IAX2 via an option control frame, which would cause the remote party to try to access it.


Upgrade to Asterisk,,, C.3.7.3 or later.

See Also

Plugin Details

Severity: Medium

ID: 55457

File Name: asterisk_ast_2011_010.nasl

Version: 1.16

Type: remote

Published: 6/29/2011

Updated: 6/27/2018

Dependencies: asterisk_detection.nasl

Configuration: Enable paranoid mode

Risk Information


Risk Factor: Low

Score: 3.6


Risk Factor: Medium

Base Score: 4

Temporal Score: 3

Vector: AV:N/AC:L/Au:S/C:N/I:N/A:P

Temporal Vector: E:U/RL:OF/RC:C

Vulnerability Information

CPE: cpe:/a:digium:asterisk

Required KB Items: asterisk/sip_detected, Settings/ParanoidReport

Exploit Ease: No known exploits are available

Patch Publication Date: 6/20/2011

Vulnerability Publication Date: 6/20/2011

Reference Information

CVE: CVE-2011-2529, CVE-2011-2535, CVE-2011-2665

BID: 48431

Secunia: 44973, 45048