Bug 1848239 (CVE-2020-14298)

Summary:	CVE-2020-14298 docker: Security regression of CVE-2019-5736 due to inclusion of vulnerable runc
Product:	[Other] Security Response	Reporter:	Sam Fowler <sfowler>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	abpalaci, adimania, admiller, ajia, amurdaca, andreas.bierfert, bdettelb, cperry, dornelas, dwalsh, fkluknav, frantisek.kluknavsky, gparvin, ichavero, jcajka, jnovy, jramanat, jschorr, jsvoboda, jweiser, lsm5, marianne, nalin, rmanes, rtillery, santiago, security-response-team, smccarty, sreber, stcannon, tfister, thee, tomckay, vbatts
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	The version of docker as released for Red Hat Enterprise Linux 7 Extras via RHBA-2020:0053 advisory included an incorrect version of runc missing the fix for CVE-2019-5736, which was previously fixed via RHSA-2019:0304. This issue could allow a malicious or compromised container to compromise the container host and other containers running on the same host.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-06-23 23:20:26 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:	1848413, 1849099, 1849946
Bug Blocks:	1848236, 1849011, 1849161

Description Sam Fowler 2020-06-18 04:05:30 UTC

The docker packages version docker-1.13.1-108.git4ef4b30.el7 as released for Red Hat Enterprise Linux 7 Extras via RHBA-2020:0053 (https://access.redhat.com/errata/RHBA-2020:0053) included an incorrect version of runc that was missing multiple bug and security fixes.  One of the fixes regressed in that update was the fix for CVE-2019-5736, that was previously corrected in the docker packages in Red Hat Enterprise Linux 7 Extras via RHSA-2019:0304 (https://access.redhat.com/errata/RHSA-2019:0304).  The CVE-2020-14298 was assigned to this security regression and it is specific to the docker packages produced by Red Hat.

The original issue - CVE-2019-5736 - could possibly allow a privileged process inside container to compromise a process entering container namespace and execute arbitrary code outside of the container.  This could lead to compromise of the container host or other containers running on the same container host.  For more details about the original issue, see:

https://access.redhat.com/security/cve/CVE-2020-14298
https://access.redhat.com/security/vulnerabilities/runcescape
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-5736

This regression as corrected in docker-1.13.1-109.gitcccb291.el7_7 released via RHBA-2020:0427 (https://access.redhat.com/errata/RHBA-2020:0427).

Comment 3 Sam Fowler 2020-06-18 04:21:28 UTC

Mitigation:

This issue is mitigated on Red Hat Enterprise Linux 7 if SELinux is in enforcing mode, which prevents containers from escaping to the host machine.

Comment 11 Clifford Perry 2020-06-19 21:00:34 UTC

Statement:

This issue only affects a single version of docker, 1.13.1-108.git4ef4b30.el7, shipped in Red Hat Enterprise Linux 7 Extras. Both earlier and later versions are not affected.

This issue is not exploitable on Red Hat Enterprise Linux Atomic Host 7 as the exploit requires replacement of the docker-runc binary, which is stored on a read-only filesystem and cannot be overwritten.

Comment 17 errata-xmlrpc 2020-06-23 19:43:20 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7 Extras

Via RHSA-2020:2653 https://access.redhat.com/errata/RHSA-2020:2653

Comment 18 Product Security DevOps Team 2020-06-23 23:20:26 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-2020-14298