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)

Critical Nessus Plugin ID 107101

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-2018-002.html

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

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

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

Plugin Details

Severity: Critical

ID: 107101

File Name: asterisk_ast_2018_002-005.nasl

Version: 1.5

Type: remote

Family: Misc.

Published: 2018/03/02

Modified: 2018/06/29

Dependencies: 63202

Risk Information

Risk Factor: Critical

CVSSv2

Base Score: 10

Temporal Score: 7.8

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

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

CVSSv3

Base Score: 9.8

Temporal Score: 8.8

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

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

Vulnerability Information

CPE: cpe:/a:digium:asterisk

Required KB Items: asterisk/sip_detected, Settings/ParanoidReport

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2018/02/21

Vulnerability Publication Date: 2018/02/21

Reference Information

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

BID: 103129, 103151