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CVE-2018-17281

7.5 · HIGH

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.

Published Sep 24, 2018CWE-400EPSS 52.45%

Overview

CVE-2018-17281 is a high-severity vulnerability. It was published on September 24, 2018 and has a CVSS 3.0 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refdownloads.asterisk.org/pub/security/AST-2018-009.htmlRefpacketstormsecurity.com/files/149453/Asterisk-Project-Security-Advisory-AST-2018-009.htmlRefseclists.org/fulldisclosure/2018/Sep/31Refwww.securityfocus.com/bid/105389Refwww.securitytracker.com/id/1041694Refissues.asterisk.org/jira/browse/ASTERISK-28013Reflists.debian.org/debian-lts-announce/2018/09/msg00034.htmlRefseclists.org/bugtraq/2018/Sep/53Refsecurity.gentoo.org/glsa/201811-11Refwww.debian.org/security/2018/dsa-4320

How CyberStrike helps

Frequently asked questions

What is CVE-2018-17281?

CVE-2018-17281 is a high-severity vulnerability. It was published on September 24, 2018 and has a CVSS 3.0 base score of 7.5 (HIGH).

How severe is CVE-2018-17281?

This vulnerability has a CVSS 3.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2018-17281?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2018-17281?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2018-17281 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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