Bug 1633243 (CVE-2018-14650)

Summary:	CVE-2018-14650 sos-collector: incorrect permissions set on newly created files
Product:	[Other] Security Response	Reporter:	Riccardo Schirone <rschiron>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	jhunsaker, security-response-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	It was discovered that sos-collector does not properly set the default permissions of newly created files, making all files created by the tool readable by any local user. A local attacker may use this flaw by waiting for a legit user to run sos-collector and steal the collected data in the /var/tmp directory.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-10 10:38:50 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:	1633659, 1633666, 1644776
Bug Blocks:	1610988, 1633248

Description Riccardo Schirone 2018-09-26 13:47:24 UTC

sos-collector does not set any permission when creating new files, thus the default umask is used, making all newly created files readable by all local users. Given the delicacy of the data collected by sos-collector, all files created by the tool, including the sos-reports collected from the cluster machines, should be accessible only the to current user. A local attacker can use this flaw to read sensitive information collected from other machines when a legit user runs sos-collector.

Upstream patch:
https://github.com/sosreport/sos-collector/commit/72058f9253e7ed8c7243e2ff76a16d97b03d65ed

Comment 3 Riccardo Schirone 2018-09-26 14:47:28 UTC

Acknowledgments:

Name: Riccardo Schirone (Red Hat Product Security)

Comment 4 Riccardo Schirone 2018-09-27 13:31:46 UTC

Created sos-collector tracking bugs for this issue:

Affects: fedora-all [bug 1633659]

Comment 7 errata-xmlrpc 2018-11-27 01:19:38 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:3663 https://access.redhat.com/errata/RHSA-2018:3663