Virtuozzo 6 : parallels-server-bm-release / vzkernel / etc (VZA-2017-055)

Medium Nessus Plugin ID 101052

Synopsis

The remote Virtuozzo host is missing a security update.

Description

According to the version of the parallels-server-bm-release / vzkernel / etc packages installed, the Virtuozzo installation on the remote host is affected by the following vulnerability :

- A flaw was found in the way memory was being allocated on the stack for user space binaries. If heap (or different memory region) and stack memory regions were adjacent to each other, an attacker could use this flaw to jump over the stack guard gap, cause controlled memory corruption on process stack or the adjacent memory region, and thus increase their privileges on the system. This is a kernel-side mitigation which increases the stack guard gap size from one page to 1 MiB to make successful exploitation of this issue more difficult.

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 affected parallels-server-bm-release / vzkernel / etc package.

See Also

https://help.virtuozzo.com/customer/portal/articles/2830102

Plugin Details

Severity: Medium

ID: 101052

File Name: Virtuozzo_VZA-2017-055.nasl

Version: 3.14

Type: local

Published: 2017/06/27

Updated: 2019/04/10

Dependencies: 12634

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 6.2

Temporal Score: 5.1

Vector: CVSS2#AV:L/AC:H/Au:N/C:C/I:C/A:C

Temporal Vector: CVSS2#E:F/RL:OF/RC:C

CVSS v3.0

Base Score: 7.4

Temporal Score: 6.8

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

Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:virtuozzo:virtuozzo:parallels-server-bm-release, p-cpe:/a:virtuozzo:virtuozzo:vzkernel, p-cpe:/a:virtuozzo:virtuozzo:vzkernel-devel, p-cpe:/a:virtuozzo:virtuozzo:vzkernel-firmware, p-cpe:/a:virtuozzo:virtuozzo:vzmodules, p-cpe:/a:virtuozzo:virtuozzo:vzmodules-devel, cpe:/o:virtuozzo:virtuozzo:6

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2017/06/26

Exploitable With

Metasploit (rsh_stack_clash_priv_esc.rb)

Reference Information

CVE: CVE-2017-1000364