Asterisk 13.x < 13.18.5 / 14.x < 14.7.5 / 15.x < 15.1.5 / 13.13 < 13.18-cert2 Crash in PJSIP (AST-2017-014)

medium Nessus Plugin ID 105545

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VPR Score: 3.6

Synopsis

A telephony application running on the remote host is affected by a remote denial of service vulnerability.

Description

According to its SIP banner, the version of Asterisk running on the remote host is 13.x prior to 13.18.5, 14.x prior to 14.7.5, 15.x prior to 15.1.5, or 13.18 prior to 13.18-cert2. It is therefore, affected by a remote denial of service attack as described in AST-2017-014.

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 version 13.18.5 / 14.7.5 / 15.1.4 / 13.18-cert2 or later.

Plugin Details

Severity: Medium

ID: 105545

File Name: asterisk_ast_2017_014.nasl

Version: 1.6

Type: remote

Family: Misc.

Published: 1/4/2018

Updated: 11/8/2019

Dependencies: asterisk_detection.nasl

Configuration: Enable paranoid mode

Risk Information

Risk Factor: Medium

VPR Score: 3.6

CVSS Score Source: CVE-2017-17850

CVSS v2.0

Base Score: 5

Temporal Score: 3.7

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

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

CVSS v3.0

Base Score: 7.5

Temporal Score: 6.5

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

Temporal Vector: E:U/RL:O/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: 12/13/2017

Vulnerability Publication Date: 12/12/2017

Reference Information

CVE: CVE-2017-17850