Virtuozzo 7 : readykernel-patch (VZA-2017-071)

This script is Copyright (C) 2017 Tenable Network Security, Inc.

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

- 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.

See also :

Solution :

Update the readykernel patch.

Risk factor :

Medium / CVSS Base Score : 6.9
CVSS Temporal Score : 5.7
Public Exploit Available : true

Family: Virtuozzo Local Security Checks

Nessus Plugin ID: 102591 ()

Bugtraq ID:

CVE ID: CVE-2017-1000111

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