Detections
Analytics
Virtuozzo 7 : readykernel-patch (VZA-2017-109)
high Nessus Plugin ID 105165
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 :- dccp_disconnect() set the socket state to DCCP_CLOSED but did not properly free some of the resources associated with that socket. This could result in a use-after-free and could potentially allow an attacker to escalate their privileges.
- The Linux kernel is vulnerable to a use-after-free issue. It could occur while closing a xfrm netlink socket, in xfrm_dump_policy_done. A user/process could use this flaw to potentially escalate their privileges on a system.
- A flaw was found in the patches used to fix the 'Dirty COW' vulnerability (CVE-2016-5195). An attacker, able to run local code, can exploit a race condition in transparent huge pages to modify usually read-only huge pages.
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/2909949
Plugin Details
Severity: High
ID: 105165
File Name: Virtuozzo_VZA-2017-109.nasl
Version: 3.11
Type: local
Family: Virtuozzo Local Security Checks
Published: 12/12/2017
Updated: 11/12/2025
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: High
Score: 8.9
CVSS v2
Risk Factor: High
Base Score: 7.2
Temporal Score: 6.3
Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2017-8824
CVSS v3
Risk Factor: High
Base Score: 7.8
Temporal Score: 7.5
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:H/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:virtuozzo:virtuozzo:7, p-cpe:/a:virtuozzo:virtuozzo:readykernel
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: 12/11/2017