Asterisk SIP Remote Authentication Bypass

medium Nessus Plugin ID 32135

Language:

Synopsis

It is possible to bypass authentication and make calls using the remote VoIP service.

Description

The version of Asterisk running on the remote host allows unauthenticated calls via the SIP channel driver. Using a specially crafted From header, a remote attacker can bypass authentication and make calls into the context specified in the 'general' section of 'sip.conf'.

Solution

Upgrade to Asterisk 1.2.27 / 1.4.18.1 / 1.4.19-rc3 / 1.6.0-beta6, Asterisk Business Edition B.2.5.1 / C.1.6.2, AsteriskNOW 1.0.2, Asterisk Appliance Developer Kit 1.4 revision 109393, s800i (Asterisk Appliance) 1.1.0.2 or later.

Plugin Details

Severity: Medium

ID: 32135

File Name: asterisk_sip_auth_bypass.nasl

Version: 1.22

Type: remote

Family: Misc.

Published: 5/7/2008

Updated: 4/11/2022

Configuration: Enable paranoid mode, Enable thorough checks

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.2

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

Vulnerability Information

CPE: cpe:/a:asterisk:asterisk_business_edition

Required KB Items: asterisk/sip_detected, Settings/ParanoidReport

Exploit Ease: No known exploits are available

Patch Publication Date: 3/18/2008

Reference Information

CVE: CVE-2008-1332

BID: 28310

CWE: 264

Detections

Analytics