Test ID:	1.3.6.1.4.1.25623.1.0.845045
Category:	Ubuntu Local Security Checks
Title:	Ubuntu: Security Advisory (USN-5070-1)
Summary:	The remote host is missing an update for the 'linux, linux-aws, linux-aws-5.11, linux-azure, linux-azure-5.11, linux-gcp, linux-hwe-5.11, linux-kvm, linux-oracle, linux-oracle-5.11, linux-raspi' package(s) announced via the USN-5070-1 advisory.
Description:	Summary: The remote host is missing an update for the 'linux, linux-aws, linux-aws-5.11, linux-azure, linux-azure-5.11, linux-gcp, linux-hwe-5.11, linux-kvm, linux-oracle, linux-oracle-5.11, linux-raspi' package(s) announced via the USN-5070-1 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) It was discovered that the Linux kernel did not properly enforce certain types of entries in the Secure Boot Forbidden Signature Database (aka dbx) protection mechanism. An attacker could use this to bypass UEFI Secure Boot restrictions. (CVE-2020-26541) It was discovered that the KVM hypervisor implementation in the Linux kernel did not properly perform reference counting in some situations, leading to a use-after-free vulnerability. An attacker who could start and control a VM could possibly use this to expose sensitive information or execute arbitrary code. (CVE-2021-22543) Norbert Slusarek discovered that the CAN broadcast manager (bcm) protocol implementation in the Linux kernel did not properly initialize memory in some situations. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2021-34693) Murray McAllister discovered that the joystick device interface in the Linux kernel did not properly validate data passed via an ioctl(). A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code on systems with a joystick device registered. (CVE-2021-3612) It was discovered that the KVM hypervisor implementation in the Linux kernel did not properly compute the access permissions for shadow pages in some situations. A local attacker could use this to cause a denial of service. (CVE-2021-38198) It was discovered that the perf subsystem in the Linux kernel for the PowerPC architecture contained a null pointer dereference in some situations. An attacker could use this to cause a denial of service (system crash). (CVE-2021-38200) Ben Greear discovered that the mac80211 subsystem in the Linux kernel contained a null pointer dereference in some situations. A physically proximate attacker could possibly use this to cause a denial of service (system crash). (CVE-2021-38206) It was discovered that the Xilinx LL TEMAC device driver in the Linux kernel did not properly calculate the number of buffers to be used in certain situations. A remote attacker could use this to cause a denial of service (system crash). (CVE-2021-38207) Affected Software/OS: 'linux, linux-aws, linux-aws-5.11, linux-azure, linux-azure-5.11, linux-gcp, linux-hwe-5.11, linux-kvm, linux-oracle, linux-oracle-5.11, linux-raspi' package(s) on Ubuntu 20.04, Ubuntu 21.04. 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-2020-26541 https://lkml.org/lkml/2020/9/15/1871 Common Vulnerability Exposure (CVE) ID: CVE-2021-22543 FEDORA-2021-95f2f1cfc7 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ROQIXQB7ZAWI3KSGSHR6H5RDUWZI775S/ FEDORA-2021-fe826f202e https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4G5YBUVEPHZYXMKNGBZ3S6INFCTEEL4E/ [debian-lts-announce] 20211015 [SECURITY] [DLA 2785-1] linux-4.19 security update https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html [debian-lts-announce] 20211216 [SECURITY] [DLA 2843-1] linux security update https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html [oss-security] 20210626 Re: CVE-2021-22543 - /dev/kvm LPE http://www.openwall.com/lists/oss-security/2021/06/26/1 https://github.com/google/security-research/security/advisories/GHSA-7wq5-phmq-m584 https://security.netapp.com/advisory/ntap-20210708-0002/ Common Vulnerability Exposure (CVE) ID: CVE-2021-34693 Debian Security Information: DSA-4941 (Google Search) https://www.debian.org/security/2021/dsa-4941 https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5e87ddbe3942e27e939bdc02deb8579b0cbd8ecc https://lore.kernel.org/netdev/trinity-87eaea25-2a7d-4aa9-92a5-269b822e5d95-1623609211076@3c-app-gmx-bs04/T/ https://lists.debian.org/debian-lts-announce/2021/07/msg00014.html https://lists.debian.org/debian-lts-announce/2021/07/msg00016.html https://lists.debian.org/debian-lts-announce/2021/07/msg00015.html http://www.openwall.com/lists/oss-security/2021/06/15/1 Common Vulnerability Exposure (CVE) ID: CVE-2021-3612 https://security.netapp.com/advisory/ntap-20210805-0005/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YKGI562LFV5MESTMVTCG5RORSBT6NGBN/ https://bugzilla.redhat.com/show_bug.cgi?id=1974079 https://lore.kernel.org/linux-input/20210620120030.1513655-1-avlarkin82@gmail.com/ https://www.oracle.com/security-alerts/cpujul2022.html 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 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 Common Vulnerability Exposure (CVE) ID: CVE-2021-38198 https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.11 https://github.com/torvalds/linux/commit/b1bd5cba3306691c771d558e94baa73e8b0b96b7 Common Vulnerability Exposure (CVE) ID: CVE-2021-38200 https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.13 https://github.com/torvalds/linux/commit/60b7ed54a41b550d50caf7f2418db4a7e75b5bdc Common Vulnerability Exposure (CVE) ID: CVE-2021-38206 https://github.com/torvalds/linux/commit/bddc0c411a45d3718ac535a070f349be8eca8d48 Common Vulnerability Exposure (CVE) ID: CVE-2021-38207 https://github.com/torvalds/linux/commit/c364df2489b8ef2f5e3159b1dff1ff1fdb16040d
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