Bug 1263126 (CVE-2015-6927)

Summary: CVE-2015-6927 vzctl: gaining control over simfs containers
Product: [Other] Security Response Reporter: Martin Prpič <mprpic>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: avagin, carnil, glommer
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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:
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:


Debian advisory:


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.


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.