Bug 1932283 (CVE-2021-20264)

Summary:	CVE-2021-20264 containers/openjdk: /etc/passwd is given incorrect privileges
Product:	[Other] Security Response	Reporter:	Jonathan Christison <jochrist>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	chazlett, dbhole, jochrist, neugens, pjindal, security-response-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	openjdk 1.8	Doc Type:	If docs needed, set a value
Doc Text:	An insecure modification flaw in the /etc/passwd file was found in the openjdk-1.8 and openjdk-11 containers. This flaw allows an attacker with access to the container to modify /etc/passwd and escalate their privileges. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-03-23 17:35:43 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:	1776664, 1934081, 1937223

Description Jonathan Christison 2021-02-24 12:46:11 UTC

It has been found that multiple containers modify the permissions of /etc/passwd to make them modifiable by users other than root. An attacker with access to the running container can exploit this to modify /etc/passwd to add a user and escalate their privileges. This CVE is specific to openjdk containers (ubi8/openjdk-8, ubi8/openjdk-11, openjdk/openjdk-11-rhel7, redhat-openjdk-18/openjdk18-openshift)

Comment 5 Jonathan Christison 2021-03-09 09:53:44 UTC

Acknowledgments:

Name: Lukas Najman (Quadient)

Comment 8 errata-xmlrpc 2021-03-19 16:55:35 UTC

This issue has been addressed in the following products:

  Red Hat Build of OpenJDK

Via RHSA-2021:0946 https://access.redhat.com/errata/RHSA-2021:0946

Comment 9 errata-xmlrpc 2021-03-19 16:56:02 UTC

This issue has been addressed in the following products:

  Red Hat Build of OpenJDK

Via RHSA-2021:0945 https://access.redhat.com/errata/RHSA-2021:0945

Comment 10 Product Security DevOps Team 2021-03-23 17:35:43 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-2021-20264