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Test ID:1.3.6.1.4.1.25623.1.1.12.2021.5062.1
Category:Ubuntu Local Security Checks
Title:Ubuntu: Security Advisory (USN-5062-1)
Summary:The remote host is missing an update for the 'linux, linux-aws, linux-kvm, linux-lts-xenial' package(s) announced via the USN-5062-1 advisory.
Description:Summary:
The remote host is missing an update for the 'linux, linux-aws, linux-kvm, linux-lts-xenial' package(s) announced via the USN-5062-1 advisory.

Vulnerability Insight:
Maxim Levitsky discovered that the KVM hypervisor implementation for AMD
processors in the Linux kernel did not properly prevent a guest VM from
enabling AVIC in nested guest VMs. An attacker in a guest VM could use this
to write to portions of the host's physical memory.

Affected Software/OS:
'linux, linux-aws, linux-kvm, linux-lts-xenial' package(s) on Ubuntu 14.04, Ubuntu 16.04.

Solution:
Please install the updated package(s).

CVSS Score:
6.1

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

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2021-3653
http://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-LSN-0083-1.html
https://bugzilla.redhat.com/show_bug.cgi?id=1983686
https://www.openwall.com/lists/oss-security/2021/08/16/1
https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html
https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html
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