CVE-2018-17281
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.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 52.4%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
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.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 52.45% probability · 99th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-400
- Affected
- digium/asterisk · digium/certified asterisk · debian/debian linux
- Source
- cve@mitre.org
EPSS moved from 49.3% on 21 September 2026 to 52.4% on 27 October 2026, peaking at 53.4% on 22 September 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
References
- http://downloads.asterisk.org/pub/security/AST-2018-009.htmlPatch, Vendor Advisory
- http://packetstormsecurity.com/files/149453/Asterisk-Project-Security-Advisory-AST-2018-009.htmlThird Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2018/Sep/31Mailing List, Patch, Third Party Advisory
- http://www.securityfocus.com/bid/105389Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1041694Third Party Advisory, VDB Entry
- https://issues.asterisk.org/jira/browse/ASTERISK-28013Issue Tracking, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/09/msg00034.htmlMailing List, Third Party Advisory
- https://seclists.org/bugtraq/2018/Sep/53Mailing List, Patch, Third Party Advisory
- https://security.gentoo.org/glsa/201811-11Third Party Advisory
- https://www.debian.org/security/2018/dsa-4320Third Party Advisory
- http://downloads.asterisk.org/pub/security/AST-2018-009.htmlPatch, Vendor Advisory
- http://packetstormsecurity.com/files/149453/Asterisk-Project-Security-Advisory-AST-2018-009.htmlThird Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2018/Sep/31Mailing List, Patch, Third Party Advisory
- http://www.securityfocus.com/bid/105389Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1041694Third Party Advisory, VDB Entry
- https://issues.asterisk.org/jira/browse/ASTERISK-28013Issue Tracking, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/09/msg00034.htmlMailing List, Third Party Advisory
- https://seclists.org/bugtraq/2018/Sep/53Mailing List, Patch, Third Party Advisory
- https://security.gentoo.org/glsa/201811-11Third Party Advisory
- https://www.debian.org/security/2018/dsa-4320Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.