Detections
Analytics
Virtuozzo 7 : readykernel-patch (VZA-2017-078)
high Nessus Plugin ID 102980
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 kernel data leak due to an out-of-bound read was found in the Linux kernel in inet_diag_msg_sctp{,l}addr_fill() and sctp_get_sctp_info() functions present since version 4.7-rc1 through version 4.13. A data leak happens when these functions fill in sockaddr data structures used to export socket's diagnostic information. As a result, up to 100 bytes of the slab data could be leaked to a userspace.
- The __ip6_append_data function in net/ipv6/ip6_output.c in the Linux kernel through 4.11.3 is too late in checking whether an overwrite of an skb data structure may occur, which allows local users to cause a denial of service (system crash) via crafted system calls.
- A divide-by-zero vulnerability was found in the
__tcp_select_window function in the Linux kernel. This can result in a kernel panic causing a local denial-of-service.
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/2870913
Plugin Details
Severity: High
ID: 102980
File Name: Virtuozzo_VZA-2017-078.nasl
Version: 3.10
Type: local
Family: Virtuozzo Local Security Checks
Published: 9/7/2017
Updated: 1/4/2021
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.4
CVSS v2
Risk Factor: Medium
Base Score: 5
Temporal Score: 3.9
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N
CVSS v3
Risk Factor: High
Base Score: 7.5
Temporal Score: 6.7
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Temporal Vector: CVSS:3.0/E:P/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: 9/6/2017