Virtuozzo 7 : readykernel-patch (VZA-2017-004)

high Nessus Plugin ID 97976
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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 :

 - Linux kernel built with the Kernel-based Virtual Machine (CONFIG_KVM) support is vulnerable to an incorrect segment selector(SS) value error. The error could occur while loading values into the SS register in long mode. A user/process inside guest could use this flaw to crash the guest resulting in DoS or potentially escalate their privileges inside guest.

 - arch/x86/kvm/emulate.c in the Linux kernel through 4.9.3 allows local users to obtain sensitive information from kernel memory or cause a denial of service (use-after-free) via a crafted application that leverages instruction emulation for fxrstor, fxsave, sgdt, and sidt.

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.

Solution

Update the readykernel patch.

See Also

https://help.virtuozzo.com/customer/portal/articles/2734643

http://www.nessus.org/u?84a60371

http://www.nessus.org/u?2dca61ae

http://www.nessus.org/u?7af5a350

Plugin Details

Severity: High

ID: 97976

File Name: Virtuozzo_VZA-2017-004.nasl

Version: 1.13

Type: local

Published: 3/27/2017

Updated: 1/4/2021

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: High

Base Score: 8.4

Temporal Score: 7.3

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:virtuozzo:virtuozzo:readykernel, cpe:/o:virtuozzo:virtuozzo:7

Required KB Items: Host/local_checks_enabled, Host/Virtuozzo/release, Host/Virtuozzo/rpm-list, Host/readykernel-info

Patch Publication Date: 2/3/2017

Reference Information

CVE: CVE-2017-2583, CVE-2017-2584