HOME VULNERABILITIESCVE-2018-17281

HIGH

CVE-2018-17281

CWE-400Published: September 24, 2018· Updated: Jun 17, 2026

7.5

CVSS v3.1

Official 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.

Technical Analysis

CVE-2018-17281 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

Debian1 product(s)

debian linux

digium2 product(s)

asteriskcertified asterisk

Source: NVD CPE · 8 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

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

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

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

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

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

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

ADVISORYhttp://packetstormsecurity.com/files/149453/Asterisk-Project-Security-Advisory-AST-2018-009.html

ADVISORYhttp://www.securityfocus.com/bid/105389

ADVISORYhttp://www.securitytracker.com/id/1041694

ADVISORYhttps://issues.asterisk.org/jira/browse/ASTERISK-28013

ADVISORYhttps://lists.debian.org/debian-lts-announce/2018/09/msg00034.html

ADVISORYhttps://security.gentoo.org/glsa/201811-11

ADVISORYhttps://www.debian.org/security/2018/dsa-4320

ADVISORYhttp://packetstormsecurity.com/files/149453/Asterisk-Project-Security-Advisory-AST-2018-009.html

ADVISORYhttp://www.securityfocus.com/bid/105389

ADVISORYhttp://www.securitytracker.com/id/1041694

ADVISORYhttps://issues.asterisk.org/jira/browse/ASTERISK-28013

ADVISORYhttps://lists.debian.org/debian-lts-announce/2018/09/msg00034.html

ADVISORYhttps://security.gentoo.org/glsa/201811-11

ADVISORYhttps://www.debian.org/security/2018/dsa-4320

All References (20)

→

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

Quick Facts

CVE IDCVE-2018-17281

CVSS Score7.5 / 10

SeverityHIGH

WeaknessCWE-400

CISA KEVNo

Affected2 vendor(s)

PublishedSep 24, 2018

Related CVEs (CWE-400)

CVE-2017-1000378

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2018-17281 in threat intel feeds
→Review IDS/IPS signatures for exploitation attempts

Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.

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