Bug 1465025 (CVE-2017-9780)

Summary:	CVE-2017-9780 flatpak: Privilege escalation via setuid/world-writable file permissions
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	amigadave, dking
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	flatpak 0.8.7, flatpak 0.9.6	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2017-06-27 01:00:00 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:	1465027
Bug Blocks:	1465028

Description Andrej Nemec 2017-06-26 12:49:47 UTC

A vulnerability was found in Flatpak. A third-party app repository could include malicious apps that contain files with inappropriate permissions, for example setuid or world-writable. The files are deployed with those permissions, which would let a local attacker run the setuid executable or write to the world-writable location. In the case of the "system helper" component, files deployed as part of the app are owned by root, so in the worst case they could be setuid root.

Upstream issue:

https://github.com/flatpak/flatpak/issues/845

Comment 1 Andrej Nemec 2017-06-26 12:50:01 UTC

Acknowledgments:

Name: Colin Walters (Red Hat)

Comment 2 Andrej Nemec 2017-06-26 12:50:17 UTC

Created flatpak tracking bugs for this issue:

Affects: fedora-24 [bug 1465027]

Comment 3 Andrej Nemec 2017-06-26 12:52:15 UTC

References:

http://seclists.org/oss-sec/2017/q2/569

Comment 4 Doran Moppert 2017-06-27 01:00:00 UTC

Upstream commit for 0.8.7 branch:

https://github.com/flatpak/flatpak/commit/2c8e2417de

This is already included in flatpak-0.8.7-1.el7