Virtuozzo 7 : readykernel-patch (VZA-2019-085)

Medium Nessus Plugin ID 133462

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 :

- [3.10.0-693.21.1.vz7.46.7 to 3.10.0-957.12.2.vz7.96.21] Page cache side channel attacks via mincore(). It was discovered that a local attacker could exploit mincore() system call to obtain information about memory pages of the running applications from the page cache even if the contents of these memory pages were not available to the attacker.

- [3.10.0-693.21.1.vz7.46.7 to 3.10.0-957.12.2.vz7.96.21] infiniband: use-after-free in ucma_leave_multicast().
It was found that ucma_leave_multicast() function from 'rdma_ucm' module could try to access a certain data structure after the structure had been freed. This allows an attacker to induce kernel memory corruption, leading to a system crash or other unspecified impact.

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://virtuozzosupport.force.com/s/article/VZA-2019-085

http://www.nessus.org/u?0a4d8519

http://www.nessus.org/u?ffc54f42

http://www.nessus.org/u?1dc1187c

http://www.nessus.org/u?ce183e85

http://www.nessus.org/u?7b768cfa

http://www.nessus.org/u?7b672cab

http://www.nessus.org/u?a4161ae2

http://www.nessus.org/u?52498069

http://www.nessus.org/u?818cf162

Plugin Details

Severity: Medium

ID: 133462

File Name: Virtuozzo_VZA-2019-085.nasl

Version: 1.2

Type: local

Published: 2020/02/04

Updated: 2020/02/07

Dependencies: 12634

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 6.1

Temporal Score: 4.5

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

Exploit Ease: No known exploits are available

Patch Publication Date: 2019/11/05

Reference Information

CVE: CVE-2018-14734, CVE-2019-5489