Bug 1747222 (CVE-2019-14271)

Summary:	CVE-2019-14271 docker: nsswitch based config loaded inside chroot under Glibc
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	adimania, admiller, amurdaca, andreas.bierfert, codonell, dbecker, dj, dwalsh, fkluknav, frantisek.kluknavsky, fweimer, ichavero, jcajka, jjoyce, jschluet, kbasil, lhh, lpeer, lsm5, marianne, mburns, nalin, pkhaire, puebele, santiago, sclewis, sisharma, slinaber, vbatts, vbellur
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	docker 19.03.1	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was discovered in Docker if it is compiled with Go 1.11. During a `docker cp` command, the nsswitch facility dynamically loads a library inside a chroot that contains the contents of the container. An attacker could abuse this flaw by executing code with the root privileges.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-09-09 09:42:20 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:	1747223, 1747224
Bug Blocks:	1747225

Description Pedro Sampaio 2019-08-30 00:12:02 UTC

In Docker 19.03.x before 19.03.1 linked against the GNU C Library (aka glibc), code injection can occur when the nsswitch facility dynamically loads a library inside a chroot that contains the contents of the container.

References:

https://docs.docker.com/engine/release-notes/
https://github.com/moby/moby/issues/39449

Comment 1 Pedro Sampaio 2019-08-30 00:12:21 UTC

Created docker tracking bugs for this issue:

Affects: fedora-all [bug 1747223]
Affects: openstack-rdo [bug 1747224]

Comment 2 Riccardo Schirone 2019-09-02 17:30:13 UTC

Upstream PR:
https://github.com/moby/moby/pull/39612

Upstream patches:
https://github.com/moby/moby/commit/11e48badcb67554b3d795241855028f28d244545

Comment 5 Riccardo Schirone 2019-09-03 08:33:38 UTC

According to upstream this flaw affects only versions that use Go 1.11 (see https://github.com/moby/moby/pull/39612#issuecomment-517999360).

Comment 6 Riccardo Schirone 2019-09-03 08:34:30 UTC

Statement:

This issue did not affect the versions of docker as shipped with Red Hat Enterprise Linux 7 as they did not use Go 1.11.

Comment 7 Product Security DevOps Team 2019-09-09 09:42:20 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-2019-14271