Bug 1263126 (CVE-2015-6927)

Summary:	CVE-2015-6927 vzctl: gaining control over simfs containers
Product:	[Other] Security Response	Reporter:	Martin Prpič <mprpic>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	avagin, carnil, glommer
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 02:43:34 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:	1263127
Bug Blocks:

Description Martin Prpič 2015-09-15 07:46:05 UTC

Debian fixed the following issue in vzctl:

It was discovered that vzctl, a set of control tools for the OpenVZ server virtualisation solution, determined the storage layout of containers based on the presense of an XML file inside the container. An attacker with local root privileges in a simfs-based container could gain control over ploop-based containers. Further information on the prerequites of such an attack can be found at:

https://src.openvz.org/projects/OVZL/repos/vzctl/commits/9e98ea630ac0e88b44e3e23c878a5166aeb74e1c

Debian advisory:

https://lists.debian.org/debian-security-announce/2015/msg00256.html

Comment 1 Martin Prpič 2015-09-15 07:46:28 UTC

Created vzctl tracking bugs for this issue:

Affects: fedora-all [bug 1263127]

Comment 2 Salvatore Bonaccorso 2015-09-15 19:00:44 UTC

FYI, a CVE was requested directly to MITRE CVE assignment team for this. It was assigned CVE-2015-6927.

https://security-tracker.debian.org/tracker/CVE-2015-6927

Comment 3 Product Security DevOps Team 2019-06-08 02:43:34 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.