Bug 2020345 (CVE-2021-21697)

Summary:	CVE-2021-21697 jenkins: Agent-to-controller access control allows reading/writing most content of build directories
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:	An incorrect access restriction vulnerability was found in Jenkins. The directories agents are allowed to access include the directories where there are stored build-related information intended to allow agents to store build-related metadata during build execution. As a consequence, this allows an attacker who controls agent process to read and write the contents of any build directory stored in Jenkins with very few restrictions (build.xml and some Pipeline-related metadata).	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-12-02 23:10:37 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 16:04:42 UTC

Agents are allowed some limited access to files on the Jenkins controller file system. The directories agents are allowed to access in Jenkins 2.318 and earlier, LTS 2.303.2 and earlier include the directories storing build-related information, intended to allow agents to store build-related metadata during build execution. As a consequence, this allows any agent to read and write the contents of any build directory stored in Jenkins with very few restrictions (build.xml and some Pipeline-related metadata).

Comment 1 Michael Kaplan 2021-11-04 16:27:13 UTC

Reference:

https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2428

Comment 5 errata-xmlrpc 2021-11-29 10:37:26 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 6 errata-xmlrpc 2021-11-30 09:09:31 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 7 errata-xmlrpc 2021-12-01 12:26:15 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 8 errata-xmlrpc 2021-12-02 18:35:12 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 9 errata-xmlrpc 2021-12-02 22:01:15 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 10 Product Security DevOps Team 2021-12-02 23:10:35 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-2021-21697