Test ID:	1.3.6.1.4.1.25623.1.0.845053
Category:	Ubuntu Local Security Checks
Title:	Ubuntu: Security Advisory (USN-5072-1)
Summary:	The remote host is missing an update for the 'linux-azure-5.8, linux-oem-5.10' package(s) announced via the USN-5072-1 advisory.
Description:	Summary: The remote host is missing an update for the 'linux-azure-5.8, linux-oem-5.10' package(s) announced via the USN-5072-1 advisory. Vulnerability Insight: Maxim Levitsky and Paolo Bonzini discovered that the KVM hypervisor implementation for AMD processors in the Linux kernel allowed a guest VM to disable restrictions on VMLOAD/VMSAVE in a nested guest. An attacker in a guest VM could use this to read or write portions of the host's physical memory. (CVE-2021-3656) 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. (CVE-2021-3653) Affected Software/OS: 'linux-azure-5.8, linux-oem-5.10' package(s) on Ubuntu 20.04. Solution: Please install the updated package(s). CVSS Score: 7.2 CVSS Vector: AV:L/AC:L/Au:N/C:C/I:C/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 Common Vulnerability Exposure (CVE) ID: CVE-2021-3656 https://bugzilla.redhat.com/show_bug.cgi?id=1983988 https://git.kernel.org/pub/scm/virt/kvm/kvm.git/commit/?id=c7dfa4009965a9b2d7b329ee970eb8da0d32f0bc https://github.com/torvalds/linux/commit/c7dfa4009965a9b2d7b329ee970eb8da0d32f0bc
Copyright	Copyright (C) 2021 Greenbone AG

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