Virtuozzo 7 : readykernel-patch (VZA-2018-049)

Medium Nessus Plugin ID 111527

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 :

- It was discovered that the local users could create files with an unintended group ownership and with group execution and SGID permission bits set. It was possible when a directory was SGID, belonged to a certain group and was writable by a user who was not a member of this group. This could lead to excessive permissions granted in case when they should not.

- A flaw was discovered in the implementation of SCTP protocol. A local unprivileged user could exploit it to cause soft lockups in the kernel (and, eventually, a denial of service) using specially crafted sequences of system calls.

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/2950393

https://access.redhat.com/security/cve/cve-2018-13405

http://www.nessus.org/u?28b5b224

http://www.nessus.org/u?62a1c3be

http://www.nessus.org/u?df1c60b5

http://www.nessus.org/u?682e78e4

http://www.nessus.org/u?31d7a581

http://www.nessus.org/u?ab4d9222

http://www.nessus.org/u?d82aff40

http://www.nessus.org/u?6e739f8e

Plugin Details

Severity: Medium

ID: 111527

File Name: Virtuozzo_VZA-2018-049.nasl

Version: 1.2

Type: local

Published: 2018/08/03

Modified: 2018/08/29

Dependencies: 12634

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 4.6

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

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: 2018/08/02

Reference Information

CVE: CVE-2018-13405