Bug 2020338 (CVE-2021-21691)

Summary:	CVE-2021-21691 jenkins: Creating symbolic links is possible without the symlink permission
Product:	[Other] Security Response	Reporter:	Michael Kaplan <mkaplan>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	abenaiss, aileenc, aos-bugs, bmontgom, chazlett, drieden, eparis, ggaughan, gmalinko, janstey, jburrell, jochrist, jokerman, jwon, nstielau, pbhattac, pdelbell, spandura, sponnaga, vkumar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	jenkins 2.319, jenkins LTS 2.303.3	Doc Type:	If docs needed, set a value
Doc Text:	A vulnerability was found in Jenkins which failed to correctly validate permissions. This flaw allowed any user to create symbolic links regardless if they had the symlink permission. It may allow an attacker to read and write to arbitrary files on the Jenkins controller file system.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-12-02 22:42:12 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:	2020611, 2020612, 2020613, 2020614, 2020615, 2020616
Bug Blocks:	2020347

Description Michael Kaplan 2021-11-04 16:01:30 UTC

Creating symbolic links is possible without the symlink permission.

Comment 1 Michael Kaplan 2021-11-04 16:19:43 UTC

References:

https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2455

Comment 6 errata-xmlrpc 2021-11-29 10:37:16 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.9

Via RHSA-2021:4833 https://access.redhat.com/errata/RHSA-2021:4833

Comment 7 errata-xmlrpc 2021-11-30 09:09:16 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.8

Via RHSA-2021:4829 https://access.redhat.com/errata/RHSA-2021:4829

Comment 8 errata-xmlrpc 2021-12-01 12:26:04 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.7

Via RHSA-2021:4801 https://access.redhat.com/errata/RHSA-2021:4801

Comment 9 errata-xmlrpc 2021-12-02 18:35:02 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.6

Via RHSA-2021:4799 https://access.redhat.com/errata/RHSA-2021:4799

Comment 10 errata-xmlrpc 2021-12-02 22:01:05 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 3.11

Via RHSA-2021:4827 https://access.redhat.com/errata/RHSA-2021:4827

Comment 11 Product Security DevOps Team 2021-12-02 22:42:10 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-2021-21691