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

medium Nessus Network Monitor Plugin ID 6568

Synopsis

The remote VoIP server 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 or apply the patches listed in the Asterisk advisory

See Also

http://downloads.asterisk.org/pub/security/AST-2012-013.html

Plugin Details

Severity: Medium

ID: 6568

Family: Generic

Published: 9/10/2011

Updated: 3/6/2019

Nessus ID: 61994

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 6

Temporal Score: 5

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

CVSS v3

Risk Factor: Medium

Base Score: 5

Temporal Score: 4.7

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

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

Vulnerability Information

CPE: cpe:/a:digium:asterisk

Patch Publication Date: 8/30/2011

Vulnerability Publication Date: 8/30/2011

Reference Information

CVE: CVE-2012-4737

BID: 55335