Asterisk Multiple Vulnerabilities (AST-2011-013 / AST-2011-014)

medium Nessus Plugin ID 57289
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VPR Score: 3.6

Synopsis

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

Description

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

- An issue in the SIP protocol can lead to the enumeration of endpoints with NAT settings different from the default. Note that this is an issue with the SIP protocol itself, and that updated versions of Asterisk provide warnings and safer defaults. (AST-2011-013)

- A NULL pointer derefererence can lead to an application crash by a remote, unauthenticated user when processing a SIP request. Note that successful exploitation requires that the 'automon' feature in features.conf be enabled and that it is not by default. (AST-2011-014)

Solution

Either update to Asterisk 1.6.2.21 / 1.8.7.2 or later or disable the 'automon' feature in features.conf.

See Also

http://downloads.asterisk.org/pub/security/AST-2011-013.html

http://downloads.asterisk.org/pub/security/AST-2011-014.html

Plugin Details

Severity: Medium

ID: 57289

File Name: asterisk_ast_2011_014.nasl

Version: 1.15

Type: remote

Family: Misc.

Published: 12/14/2011

Updated: 6/27/2018

Dependencies: asterisk_detection.nasl

Configuration: Enable paranoid mode

Risk Information

Risk Factor: Medium

VPR Score: 3.6

CVSS v2.0

Base Score: 4.3

Temporal Score: 3.2

Vector: AV:N/AC:M/Au:N/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: 12/7/2011

Vulnerability Publication Date: 7/18/2011

Reference Information

CVE: CVE-2011-4597, CVE-2011-4598

BID: 50989, 50990