Bug 1730312 (CVE-2019-13228)

Summary:	CVE-2019-13228 deepin-clone: fixed path in the BootDoctor::fix() function allows symlink attack
Product:	[Other] Security Response	Reporter:	Marian Rehak <mrehak>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	robinlee.sysu, sensor.wen, sztsian
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-07-16 14:40:51 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:	1730314
Bug Blocks:

Description Marian Rehak 2019-07-16 12:30:34 UTC

deepin-clone before 1.1.3 uses a fixed path /tmp/repo.iso in the BootDoctor::fix() function to download an ISO file, and follows symlinks there. An unprivileged user can prepare a symlink attack there to create or overwrite files. The content is not attacker controlled. By winning a race condition to replace the /tmp/repo.iso symlink by an attacker controlled ISO file, further privilege escalation may be possible.

External References:

https://bugzilla.suse.com/show_bug.cgi?id=1130388

Comment 1 Marian Rehak 2019-07-16 12:31:50 UTC

Created deepin-clone tracking bugs for this issue:

Affects: fedora-30 [bug 1730314]

Comment 2 Product Security DevOps Team 2019-07-16 14:40:51 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.