high
7.5
CWE
400
Advisory Published
Updated

CVE-2018-17281

First published: Mon Sep 24 2018(Updated: )

There is a stack consumption vulnerability in the res_http_websocket.so module of Asterisk through 13.23.0, 14.7.x through 14.7.7, and 15.x through 15.6.0 and Certified Asterisk through 13.21-cert2. It allows an attacker to crash Asterisk via a specially crafted HTTP request to upgrade the connection to a websocket.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
debian/asterisk<=1:13.22.0~dfsg-2<=1:13.14.1~dfsg-1
1:13.23.1~dfsg-1
1:13.14.1~dfsg-2+deb9u4
Digium Asterisk>=13.0.0<=13.23.0
Digium Asterisk>=14.0.0<=14.7.7
Digium Asterisk>=15.0.0<=15.6.0
Digium Certified Asterisk=11.6-cert12
Digium Certified Asterisk=11.6-cert13
Digium Certified Asterisk=11.6-cert14
Digium Certified Asterisk=11.6-cert15
Digium Certified Asterisk=11.6-cert16
Digium Certified Asterisk=11.6-cert17
Digium Certified Asterisk=11.6-cert18
Digium Certified Asterisk=13.1-cert3
Digium Certified Asterisk=13.1-cert4
Digium Certified Asterisk=13.1-cert5
Digium Certified Asterisk=13.1-cert6
Digium Certified Asterisk=13.1-cert7
Digium Certified Asterisk=13.1-cert8
Digium Certified Asterisk=13.8-cert1
Digium Certified Asterisk=13.8-cert2
Digium Certified Asterisk=13.8-cert3
Digium Certified Asterisk=13.8-cert4
Digium Certified Asterisk=13.13-cert1
Digium Certified Asterisk=13.13-cert2
Digium Certified Asterisk=13.13-cert3
Digium Certified Asterisk=13.13-cert4
Digium Certified Asterisk=13.13-cert5
Digium Certified Asterisk=13.13-cert6
Digium Certified Asterisk=13.13-cert7
Digium Certified Asterisk=13.13-cert8
Digium Certified Asterisk=13.13-cert9
Digium Certified Asterisk=13.21-cert1
Digium Certified Asterisk=13.21-cert2
Debian Debian Linux=8.0
Debian Debian Linux=9.0
debian/asterisk
1:16.2.1~dfsg-1+deb10u2
1:16.28.0~dfsg-0+deb10u3
1:16.28.0~dfsg-0+deb11u3
1:20.4.0~dfsg+~cs6.13.40431414-2

Remedy

http://downloads.asterisk.org/pub/security/AST-2018-009.html

Remedy

http://seclists.org/fulldisclosure/2018/Sep/31

Remedy

https://seclists.org/bugtraq/2018/Sep/53

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Reference Links

Frequently Asked Questions

  • What is the vulnerability ID for this stack consumption vulnerability?

    The vulnerability ID for this stack consumption vulnerability is CVE-2018-17281.

  • Which Asterisk versions are affected by this vulnerability?

    Asterisk versions through 13.23.0, 14.7.x through 14.7.7, and 15.x through 15.6.0, as well as Certified Asterisk through 13.21-cert2, are affected by this vulnerability.

  • What is the severity rating of CVE-2018-17281?

    The severity rating of CVE-2018-17281 is high with a CVSS score of 7.5.

  • How can an attacker exploit this vulnerability?

    An attacker can exploit this vulnerability by sending a specially crafted HTTP request to upgrade the connection, causing Asterisk to crash.

  • Are there any known remediation steps for this vulnerability?

    Yes, upgrading to Asterisk versions 13.23.1 or higher, 14.7.8 or higher, 15.6.1 or higher, or applying the necessary patches provided by the vendor can mitigate this vulnerability.

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