Virtuozzo 7 : readykernel-patch (VZA-2017-083)

Medium Nessus Plugin ID 103426

New! Vulnerability Priority Rating (VPR)

Tenable calculates a dynamic VPR for every vulnerability. VPR combines vulnerability information with threat intelligence and machine learning algorithms to predict which vulnerabilities are most likely to be exploited in attacks. Read more about what VPR is and how it's different from CVSS.

VPR Score: 4.4

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 :

- ChunYu Wang from Red Hat found a netlink use-after-free issue by syzkaller. Access to already freed memory (groups in struct netlink_sock) could cause host crash or memory corruption.

- An unprivileged user inside a container could cause a denial of service (kernel crash in user_read() function) using a specially crafted sequence of system calls.

- The iscsi_if_rx function in drivers/scsi/scsi_transport_iscsi.c in the Linux kernel through 4.13.2 allows local users to cause a denial of service (panic) by leveraging incorrect length validation.

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/2878783

http://www.nessus.org/u?108c3980

http://www.nessus.org/u?3feb80ce

http://www.nessus.org/u?22e57864

http://www.nessus.org/u?4ac0fd0e

http://www.nessus.org/u?c85a3bea

Plugin Details

Severity: Medium

ID: 103426

File Name: Virtuozzo_VZA-2017-083.nasl

Version: 3.8

Type: local

Published: 2017/09/25

Updated: 2019/01/14

Dependencies: 12634

Risk Information

Risk Factor: Medium

VPR Score: 4.4

CVSS v2.0

Base Score: 4.9

Temporal Score: 3.8

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

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

CVSS v3.0

Base Score: 5.5

Temporal Score: 5

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

Patch Publication Date: 2017/09/21

Reference Information

CVE: CVE-2017-14489