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CVE-2015-6927

3.6 · LOW

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 user…

Published Sep 28, 2015openvzCWE-59EPSS 0.50%

Overview

CVE-2015-6927 is a low-severity vulnerability affecting openvz vzctl. It was published on September 28, 2015 and has a CVSS 2.0 base score of 3.6 (LOW).

This vulnerability has a CVSS 2.0 base score of 3.6, rated LOW. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories and patches from openvz. Update vzctl to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
openvzvzctl0Affected

References

Refwww.debian.org/security/2015/dsa-3357Refopenvz.org/Download/vzctl/4.9.4Refsecurity.gentoo.org/glsa/201701-30Refsrc.openvz.org/projects/OVZL/repos/vzctl/commits/9e98ea630ac0e88b44e3e23c878a5166aeb74e1cRefwww.debian.org/security/2015/dsa-3357Refopenvz.org/Download/vzctl/4.9.4Refsecurity.gentoo.org/glsa/201701-30Refsrc.openvz.org/projects/OVZL/repos/vzctl/commits/9e98ea630ac0e88b44e3e23c878a5166aeb74e1c

How CyberStrike helps

Frequently asked questions

What is CVE-2015-6927?

CVE-2015-6927 is a low-severity vulnerability affecting openvz vzctl. It was published on September 28, 2015 and has a CVSS 2.0 base score of 3.6 (LOW).

How severe is CVE-2015-6927?

This vulnerability has a CVSS 2.0 base score of 3.6, rated LOW. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2015-6927?

Check the references section for vendor advisories and patches from openvz. Update vzctl to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2015-6927?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2015-6927 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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