Virtuozzo 7 : readykernel-patch (VZA-2017-007)

High Nessus Plugin ID 97979

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 :

- A double free vulnerability was found in netlink_dump, which could cause a denial of service or possibly other unspecified impact.

- It was discovered that the Linux kernel since 3.6-rc1 with 'net.ipv4.tcp_fastopen' set to 1 can hit BUG() statement in tcp_collapse() function after making a number of certain syscalls leading to a possible system crash.

- A flaw was found in the way nfnetlink validated length of batch messages that could allow a user logged in to a container as root to cause a general protection fault and crash the host.

- A flaw was found in the way nfnetlink handled errors while processing batch messages that could allow a user logged in to a container as root to trigger use after free and crash the host.

- A security flaw was found in the Linux kernel that an attempt to move page mapped by AIO ring buffer to the other node triggers NULL pointer dereference at trace_writeback_dirty_page(), because aio_fs_backing_dev_info.dev is 0.

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/2750452

https://access.redhat.com/security/cve/cve-2016-3070

https://access.redhat.com/security/cve/cve-2016-8645

https://access.redhat.com/security/cve/cve-2016-9806

http://www.nessus.org/u?356fc3c7

Plugin Details

Severity: High

ID: 97979

File Name: Virtuozzo_VZA-2017-007.nasl

Version: 1.13

Type: local

Published: 2017/03/27

Updated: 2019/01/14

Dependencies: 12634

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.2

Temporal Score: 5.3

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

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

CVSS v3.0

Base Score: 7.8

Temporal Score: 6.8

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: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: 2017/02/21

Reference Information

CVE: CVE-2016-3070, CVE-2016-8645, CVE-2016-9806