Virtuozzo 7 : readykernel-patch (VZA-2017-065)

High Nessus Plugin ID 101822

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 :

- The mq_notify function in the Linux kernel through 4.11.9 does not set the sock pointer to NULL upon entry into the retry logic. During a user-space close of a Netlink socket, it allows attackers to cause a denial of service (use-after-free) or possibly have unspecified other impact.

- If the sctp module was loaded on the host, a privileged user inside a container could make sctp listen on a socket in an inappropriate state, causing a kernel crash (use-after-free in sctp_wait_for_sndbuf()).

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/2843880

http://www.nessus.org/u?cbea0ac8

http://www.nessus.org/u?2c1cc793

http://www.nessus.org/u?fb78b449

http://www.nessus.org/u?cfca4c65

http://www.nessus.org/u?fa78a6ff

Plugin Details

Severity: High

ID: 101822

File Name: Virtuozzo_VZA-2017-065.nasl

Version: 3.10

Type: local

Published: 2017/07/20

Updated: 2019/04/10

Dependencies: 12634

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.2

Temporal Score: 5.6

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

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

CVSS v3.0

Base Score: 7.8

Temporal Score: 7

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

Temporal Vector: CVSS:3.0/E:P/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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2017/07/19

Reference Information

CVE: CVE-2017-11176