Bug 1793277 (CVE-2019-19355)

Summary:	CVE-2019-19355 openshift/ocp-release-operator-sdk: /etc/passwd is given incorrect privileges
Product:	[Other] Security Response	Reporter:	Mark Cooper <mcooper>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	aos-bugs, bmontgom, cmacedo, eparis, jburrell, jlanford, jokerman, nstielau, security-response-team, sponnaga
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	An insecure modification vulnerability in the /etc/passwd file was found in the openshift/ocp-release-operator-sdk. An attacker with access to the container could use this flaw to modify /etc/passwd and escalate their privileges.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-03-11 10:31:43 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:	1793307, 1793308, 1793309, 1793310
Bug Blocks:	1776664

Description Mark Cooper 2020-01-21 04:12:14 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 the openshift/ansible-operator-container.

Original bug:
https://bugzilla.redhat.com/show_bug.cgi?id=1791534

Comment 1 Mark Cooper 2020-01-21 04:12:17 UTC

Statement:

By default this vulnerability is not exploitable in un-privilieged containers running on OpenShift Container Platform. This is because the system call SETUID and SETGID is blocked by the default seccomp policy.

Comment 5 Mark Cooper 2020-01-22 03:15:55 UTC

Acknowledgments:

Name: Joseph LaMagna-Reiter (SPR Inc.)

Comment 7 Mark Cooper 2020-02-28 02:28:10 UTC

External References:

https://access.redhat.com/articles/4859371

Comment 8 errata-xmlrpc 2020-03-11 06:25:18 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.3

Via RHSA-2020:0683 https://access.redhat.com/errata/RHSA-2020:0683

Comment 9 Product Security DevOps Team 2020-03-11 10:31:43 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-2019-19355

Comment 10 errata-xmlrpc 2020-04-08 15:44:09 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.2

Via RHSA-2020:1280 https://access.redhat.com/errata/RHSA-2020:1280

Comment 11 errata-xmlrpc 2020-04-22 16:04:22 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.1

Via RHSA-2020:1545 https://access.redhat.com/errata/RHSA-2020:1545