EulerOS Virtualization 3.0.2.6 : kvm (EulerOS-SA-2021-2856)

high Nessus Plugin ID 156536

Synopsis

The remote EulerOS Virtualization host is missing a security update.

Description

According to the versions of the kvm package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

- An out-of-bounds access issue was found in the Linux kernel, all versions through 5.3, in the way Linux kernel's KVM hypervisor implements the Coalesced MMIO write operation. It operates on an MMIO ring buffer 'struct kvm_coalesced_mmio' object, wherein write indices 'ring->first' and 'ring->last' value could be supplied by a host user-space process. An unprivileged host user or process with access to '/dev/kvm' device could use this flaw to crash the host kernel, resulting in a denial of service or potentially escalating privileges on the system. (CVE-2019-14821)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected kvm packages.

See Also

http://www.nessus.org/u?13324954

Plugin Details

Severity: High

ID: 156536

File Name: EulerOS_SA-2021-2856.nasl

Version: 1.2

Type: local

Published: 1/6/2022

Updated: 1/6/2022

Risk Information

CVSS Score Source: CVE-2019-14821

VPR

Risk Factor: Medium

Score: 6.5

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

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

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:huawei:euleros:kvm, cpe:/o:huawei:euleros:uvp:3.0.2.6

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/EulerOS/release, Host/EulerOS/rpm-list, Host/EulerOS/uvp_version

Exploit Ease: No known exploits are available

Patch Publication Date: 12/30/2021

Vulnerability Publication Date: 9/19/2019

Reference Information

CVE: CVE-2019-14821