Asterisk Peer IAX2 Call Handling ACL Rule Bypass (AST-2012-013)

medium Nessus Plugin ID 61994

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Synopsis

A telephony application running on the remote host is affected by a security bypass vulnerability.

Description

According to the version in its SIP banner, the version of Asterisk running on the remote host is potentially affected by a vulnerability that could allow a remote, authenticated attacker to bypass access controls on out-bound calls.

Inter-Asterisk eXchange (IAX2) out-bound call restrictions can be bypassed if peer credentials, defined in a dynamic Asterisk Realtime Architecture (ARA) backend, are used by an attacker.

Solution

Upgrade to Asterisk 1.8.15.1 / 10.7.1, Business Edition C.3.7.6, Certified Asterisk 1.8.11-cert7 or apply the patches listed in the Asterisk advisory.

Plugin Details

Severity: Medium

ID: 61994

File Name: asterisk_ast_2012_013.nasl

Version: 1.14

Type: remote

Family: Misc.

Published: 9/6/2012

Updated: 4/11/2022

Configuration: Enable paranoid mode, Enable thorough checks

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 6

Temporal Score: 4.4

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

Vulnerability Information

CPE: cpe:/a:digium:asterisk

Required KB Items: Settings/ParanoidReport, asterisk/sip_detected

Exploit Ease: No known exploits are available

Patch Publication Date: 8/30/2012

Vulnerability Publication Date: 8/30/2012

Reference Information

CVE: CVE-2012-4737

BID: 55335

Detections

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