Bug 1710315 (CVE-2019-11328)

Summary:	CVE-2019-11328 singularity: manipulation of file within run/singularity/instances/sing/<user>/<instance> leads to privilege escalation
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	bbockelm, dave.love, dwd
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:	2019-06-10 10:55:33 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:	1710316, 1710317
Bug Blocks:	1696499

Description Dhananjay Arunesh 2019-05-15 10:16:40 UTC

An issue was discovered in Singularity 3.1.0 to 3.2.0-rc2, a malicious user with local/network access to the host system (e.g. ssh) could exploit this vulnerability due to insecure permissions allowing a user to edit files within `/run/singularity/instances/sing/<user>/<instance>`. The manipulation of those files can change the behavior of the starter-suid program when instances are joined resulting in potential privilege escalation on the host.

Reference:
https://github.com/sylabs/singularity/releases/tag/v3.2.0

Comment 1 Dhananjay Arunesh 2019-05-15 10:17:28 UTC

Created singularity tracking bugs for this issue:

Affects: fedora-all [bug 1710316]

Comment 2 Dhananjay Arunesh 2019-05-15 10:19:18 UTC

Created singularity tracking bugs for this issue:

Affects: epel-all [bug 1710317]

Comment 3 Product Security DevOps Team 2019-06-10 10:55:33 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.