Virtuozzo 7 : readykernel-patch (VZA-2017-028)

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


Synopsis :

The remote Virtuozzo host is missing a security update.

Description :

According to the version of the vzkernel package and the
readykernel-patch installed, the Virtuozzo installation on the remote
host is affected by the following vulnerabilities :

- Race condition in drivers/tty/n_hdlc.c in the Linux
kernel through 4.10.1 allows local users to gain
privileges or cause a denial of service (double free)
by setting the HDLC line discipline.

- Kernel crash in cgroup_show_path() while running rkt in
a container.

Note that Tenable Network Security has extracted the preceding
description block directly from the Virtuozzo security advisory.
Tenable has attempted to automatically clean and format it as much as
possible without introducing additional issues.

See also :

https://help.virtuozzo.com/customer/portal/articles/2786339
http://www.nessus.org/u?ed495570
http://www.nessus.org/u?f5e9ed80
http://www.nessus.org/u?7760cfff

Solution :

Update the readykernel patch.

Risk factor :

High / CVSS Base Score : 7.2
(CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 6.8
(CVSS2#E:F/RL:U/RC:ND)
Public Exploit Available : true

Family: Virtuozzo Local Security Checks

Nessus Plugin ID: 99315 ()

Bugtraq ID:

CVE ID: CVE-2017-2636

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