Asterisk 13.x < 13.19.2 / 14.x < 14.7.6 / 13.13 < 13.18-cert3 Multiple DoS Vulnerabilities (AST-2018-002, AST-2018-003, AST-2018-004, & AST-2018-005)

medium Nessus Plugin ID 107101
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VPR Score: 4.4

Synopsis

A telephony application running on the remote host is affected by a Subscribe request crash vulnerability.

Description

According to its SIP banner, the version of Asterisk running on the remote host is 13.x prior to 13.19.2, 14.x prior to 14.7.6, or 13.18 prior to 13.18-cert3. It is therefore, affected by a Multiple Denial of Service Vulnerabilities as described in AST-2018-002, AST-2018-003, AST-2018-004, & AST-2018-005 advisories.

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 13.19.2 / 14.7.6 / 13.18-cert3 or later.

See Also

http://downloads.asterisk.org/pub/security/AST-2018-005.html

http://downloads.asterisk.org/pub/security/AST-2018-002.html

http://downloads.asterisk.org/pub/security/AST-2018-003.html

http://downloads.asterisk.org/pub/security/AST-2018-004.html

Plugin Details

Severity: Medium

ID: 107101

File Name: asterisk_ast_2018_002-005.nasl

Version: 1.6

Type: remote

Family: Misc.

Published: 3/2/2018

Updated: 11/8/2019

Dependencies: asterisk_detection.nasl

Configuration: Enable paranoid mode

Risk Information

Risk Factor: Medium

VPR Score: 4.4

CVSS Score Source: CVE-2018-7284

CVSS v2.0

Base Score: 5

Temporal Score: 3.9

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

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

CVSS v3.0

Base Score: 7.5

Temporal Score: 6.7

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

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

Vulnerability Information

CPE: cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*

Required KB Items: Settings/ParanoidReport, asterisk/sip_detected

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2/21/2018

Vulnerability Publication Date: 2/21/2018

Reference Information

CVE: CVE-2018-7286, CVE-2018-7284

BID: 103151, 103129