CVE-2018-17281

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 52.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-09-24 · updated 2026-06-17
Weakness: CWE-400

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.

Affected products

Debian Linux: 8.0, 9.0
Digium Asterisk: from 13.0.0 through 13.23.0; from 14.0.0 through 14.7.7; from 15.0.0 through 15.6.0
Digium Certified Asterisk: 11.6-cert12, 11.6-cert13, 11.6-cert14, 11.6-cert15, 11.6-cert16, 11.6-cert17 (+22)

References

http://downloads.asterisk.org/pub/security/AST-2018-009.html
http://packetstormsecurity.com/files/149453/Asterisk-Project-Security-Advisory-AST-2018-009.html
http://seclists.org/fulldisclosure/2018/Sep/31
http://www.securityfocus.com/bid/105389
http://www.securitytracker.com/id/1041694
https://issues.asterisk.org/jira/browse/ASTERISK-28013
https://lists.debian.org/debian-lts-announce/2018/09/msg00034.html
https://seclists.org/bugtraq/2018/Sep/53
https://security.gentoo.org/glsa/201811-11
https://www.debian.org/security/2018/dsa-4320
http://downloads.asterisk.org/pub/security/AST-2018-009.html
http://packetstormsecurity.com/files/149453/Asterisk-Project-Security-Advisory-AST-2018-009.html

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