What’s Vulnerable › Vulnerabilities

CVE-2015-6927

• Severity: low (CVSS 3.6 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2015-09-28 · updated 2026-06-17
• Weakness: CWE-59

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.

Affected products

• Openvz Vzctl: through 4.9.3

References

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

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