Asterisk ConfBridge 'dialplan' Privilege Escalation (AST-2014-017)

High Nessus Plugin ID 79441

Synopsis

A telephony application running on the remote host is affected by a privilege escalation vulnerability.

Description

According to the version in its SIP banner, the version of Asterisk running on the remote host is potentially affected by a privilege escalation vulnerability in the ConfBridge 'dialplan' function that is triggered when executed from an external protocol. This could allow a remote, authenticated attacker to escalate privileges. Additionally, the 'ConfbridgeStartRecord' AMI action could be leveraged to execute arbitrary system commands.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade to Asterisk 11.14.1 / 12.7.1 / 13.0.1 / 11.6-cert8 or apply the appropriate patch listed in the Asterisk advisory.

See Also

http://downloads.asterisk.org/pub/security/AST-2014-017.html

https://issues.asterisk.org/jira/browse/ASTERISK-24490

Plugin Details

Severity: High

ID: 79441

File Name: asterisk_ast_2014_017.nasl

Version: 1.9

Type: remote

Family: Misc.

Published: 2014/11/25

Updated: 2018/06/27

Dependencies: 63202

Configuration: Enable paranoid mode

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 8.5

Temporal Score: 6.3

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

Vulnerability Information

CPE: cpe:/a:digium:asterisk

Required KB Items: asterisk/sip_detected, Settings/ParanoidReport

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2014/11/20

Vulnerability Publication Date: 2014/11/20

Reference Information

CVE: CVE-2014-8417

BID: 71228