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

This script is Copyright (C) 2011-2016 Tenable Network Security, Inc.

Synopsis :

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

Description :

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.

See also :

Solution :

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

Risk factor :

Medium / CVSS Base Score : 4.0
CVSS Temporal Score : 3.0
Public Exploit Available : false

Family: Denial of Service

Nessus Plugin ID: 55457 ()

Bugtraq ID: 48431

CVE ID: CVE-2011-2529

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