Detections
Analytics
Virtuozzo 7 : readykernel-patch (VZA-2017-071)
high Nessus Plugin ID 102591
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/2860784
http://www.nessus.org/u?4df481da
Plugin Details
Severity: High
ID: 102591
File Name: Virtuozzo_VZA-2017-071.nasl
Version: 3.10
Type: local
Family: Virtuozzo Local Security Checks
Published: 8/21/2017
Updated: 1/4/2021
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Critical
Score: 9.6
CVSS v2
Risk Factor: High
Base Score: 7.2
Temporal Score: 6
Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS v3
Risk Factor: High
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: 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: 8/17/2017
Exploitable With
Core Impact
Metasploit (Linux Kernel UDP Fragmentation Offset (UFO) Privilege Escalation)