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

medium Nessus Network Monitor Plugin ID 5969


The remote VoIP server is vulnerable to multiple denial of service attacks.


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. (AST-2011-010)


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

See Also

Plugin Details

Severity: Medium

ID: 5969

Family: Generic

Published: 6/27/2011

Updated: 3/6/2019

Nessus ID: 55457

Risk Information


Risk Factor: Medium

Base Score: 4

Temporal Score: 3

Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:P


Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.8

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:digium:asterisk

Patch Publication Date: 6/20/2011

Vulnerability Publication Date: 6/20/2011

Reference Information

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

BID: 48431