Bug 1665578 (CVE-2019-3827)

Summary:	CVE-2019-3827 gvfs: Incorrect authorization in admin backend allows privileged users to read and modify arbitrary files without prompting for password
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	jrybar, oholy, security-response-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	gvfs 1.39.4	Doc Type:	If docs needed, set a value
Doc Text:	An incorrect permission check in the admin backend in gvfs was found that allows reading and modify arbitrary files by privileged users without asking for password when no authentication agent is running. This vulnerability can be exploited by malicious programs running under privileges of users belonging to the wheel group to further escalate its privileges by modifying system files without user's knowledge. Successful exploitation requires uncommon system configuration.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-07-12 13:06:27 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:	1673885, 1673887, 1673888, 1690470
Bug Blocks:	1665579

Description Pedro Sampaio 2019-01-11 20:17:34 UTC

A flaw was found in gvfs 1.38.1-1. Unprivileged users are not prompted to give password when accessing root owned files.

Upstream issue:

https://gitlab.gnome.org/GNOME/gvfs/issues/355

Upstream patch:

https://gitlab.gnome.org/GNOME/gvfs/merge_requests/31

Comment 1 Adam Mariš 2019-02-08 10:51:03 UTC

This flaw affects gvfs since 1.29.4 where admin backend was introduced up to and including 1.39.4.

Comment 2 Adam Mariš 2019-02-08 11:17:34 UTC

Statement:

This issue did not affect the versions of gvfs as shipped with Red Hat Enterprise Linux 6 as they did not include support for admin backend.

Comment 3 Adam Mariš 2019-02-08 11:20:37 UTC

Created gvfs tracking bugs for this issue:

Affects: fedora-all [bug 1673885]

Comment 6 errata-xmlrpc 2019-06-18 17:19:23 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2019:1517 https://access.redhat.com/errata/RHSA-2019:1517

Comment 7 Product Security DevOps Team 2019-07-12 13:06:27 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-2019-3827

Comment 8 errata-xmlrpc 2019-08-06 12:20:34 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2019:2145 https://access.redhat.com/errata/RHSA-2019:2145