Bug 1955272 (CVE-2021-22139)

Summary:	CVE-2021-22139 kibana: denial of service via webhook actions due to a lack of timeout or a limit on the request size
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	aos-bugs, bmontgom, eparis, ewolinet, jburrell, jcantril, jokerman, nstielau, sponnaga
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kibana 7.12.1	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-05-11 20:33:43 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	1955273

Description Guilherme de Almeida Suckevicz 2021-04-29 19:20:46 UTC

A denial of service vulnerability was found in the Kibana webhook actions due to a lack of timeout or a limit on the request size. An attacker with permissions to create webhook actions could drain the Kibana host connection pool, making Kibana unavailable for all other users.

Reference:
https://discuss.elastic.co/t/7-12-1-security-update/271433

Comment 2 Przemyslaw Roguski 2021-05-06 16:40:28 UTC

External References:

https://discuss.elastic.co/t/7-12-1-security-update/271433

Comment 4 Mark Cooper 2021-05-06 23:55:37 UTC

Statement:

The kibana webhook actions are part of the X-Pack features [1].
In OpenShift Container Platform (OCP) the kibana components have X-Pack security features disabled by default. The X-Pack plugin can be used only in the enterprise version [2].
Hence the open source version is unaffected by this vulnerability.

[1] https://www.elastic.co/guide/en/kibana/current/webhook-action-type.html 
[2] https://www.elastic.co/subscriptions

Comment 5 Product Security DevOps Team 2021-05-11 20:33:43 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2021-22139