CVE-2018-17281

high-risk

Published 2018-09-24

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.

Do I need to act?

80.3% chance of exploitation in next 30 days

EPSS score — higher than 20% of all CVEs

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 7.5/10 High

NETWORK / LOW complexity

Affected Products (20)

Asterisk

Certified Asterisk

Affected Vendors

Debian Digium

References (20)

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

Third Party Advisory http://packetstormsecurity.com/files/149453/Asterisk-Project-Security-Advisory-A...

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

Third Party Advisory http://www.securityfocus.com/bid/105389

Third Party Advisory http://www.securitytracker.com/id/1041694

Issue Tracking https://issues.asterisk.org/jira/browse/ASTERISK-28013

Mailing List https://lists.debian.org/debian-lts-announce/2018/09/msg00034.html

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

Third Party Advisory https://security.gentoo.org/glsa/201811-11

Third Party Advisory https://www.debian.org/security/2018/dsa-4320