National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2015-6927 Detail

Current Description

vzctl before 4.9.4 determines the virtual environment (VE) layout based on the presence of root.hdd/DiskDescriptor.xml in the VE private directory, which allows local simfs container (CT) root users to change the root password for arbitrary ploop containers, as demonstrated by a symlink attack on the ploop container root.hdd file and then access a control panel.

Source:  MITRE
View Analysis Description

Impact

CVSS v2.0 Severity and Metrics:

Base Score: 3.6 LOW
Vector: (AV:L/AC:L/Au:N/C:N/I:P/A:P) (V2 legend)
Impact Subscore: 4.9
Exploitability Subscore: 3.9


Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (AU): None
Confidentiality (C): None
Integrity (I): Partial
Availability (A): Partial
Additional Information:
Allows unauthorized modification
Allows disruption of service

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://www.debian.org/security/2015/dsa-3357
https://openvz.org/Download/vzctl/4.9.4 Patch
https://security.gentoo.org/glsa/201701-30
https://src.openvz.org/projects/OVZL/repos/vzctl/commits/9e98ea630ac0e88b44e3e23c878a5166aeb74e1c Exploit

Technical Details

Vulnerability Type (View All)

  • Improper Link Resolution Before File Access ('Link Following') (CWE-59)

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:openvz:vzctl:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
4.9.3


Change History

3 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2015-6927
NVD Published Date:
09/28/2015
NVD Last Modified:
06/30/2017