Virtuozzo 7 : readykernel-patch (VZA-2017-072)

High Nessus Plugin ID 102592

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 race condition issue leading to a use-after-free flaw was found in the way the raw packet sockets are implemented in the Linux kernel networking subsystem handling synchronization. A local user able to open a raw packet socket (requires the CAP_NET_RAW capability) could use this flaw to elevate their privileges on the system.

- Andrey Konovalov discovered a race condition in the UDP Fragmentation Offload (UFO) code in the Linux kernel. A local attacker could use this to cause a denial of service or execute arbitrary code.

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/2860785

http://www.nessus.org/u?f3a07813

http://www.nessus.org/u?13d1f21f

Plugin Details

Severity: High

ID: 102592

File Name: Virtuozzo_VZA-2017-072.nasl

Version: 3.6

Type: local

Published: 2017/08/21

Modified: 2018/08/03

Dependencies: 12634

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.2

Temporal Score: 6

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

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

CVSS v3.0

Base Score: 7.8

Temporal Score: 7.2

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:F/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: 2017/08/17

Exploitable With

Core Impact

Metasploit (Linux Kernel UDP Fragmentation Offset (UFO) Privilege Escalation)

Reference Information

CVE: CVE-2017-1000111, CVE-2017-1000112