GLSA-201701-30 : vzctl: Security bypass

This script is Copyright (C) 2017 Tenable Network Security, Inc.


Synopsis :

The remote Gentoo host is missing one or more security-related
patches.

Description :

The remote host is affected by the vulnerability described in GLSA-201701-30
(vzctl: Security bypass)

It was discovered that vzctl determined the virtual environment (VE)
layout based on the presence of root.hdd/DiskDescriptor.xml in the VE
private directory. This allows local simfs container (CT) root users to
change the root password for arbitrary ploop containers. This is
demonstrated by a symlink attack on the ploop container root.hdd file
which can then be used to access a control panel.

Impact :

An attacker with root privileges, in a simfs-based container, could gain
control over ploop-based containers.

Workaround :

There is no known workaround at this time.

See also :

https://security.gentoo.org/glsa/201701-30

Solution :

All vzctl users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=sys-cluster/vzctl-4.9.4'

Risk factor :

Low / CVSS Base Score : 3.6
(CVSS2#AV:L/AC:L/Au:N/C:N/I:P/A:P)

Family: Gentoo Local Security Checks

Nessus Plugin ID: 96424 ()

Bugtraq ID:

CVE ID: CVE-2015-6927

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