Test ID:	1.3.6.1.4.1.25623.1.0.845075
Category:	Ubuntu Local Security Checks
Title:	Ubuntu: Security Advisory (USN-5091-1)
Summary:	The remote host is missing an update for the 'linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-gke, linux-gke-5.4, linux-gkeop, linux-gkeop-5.4, linux-hwe-5.4, linux-kvm, linux-oracle, linux-oracle-5.4' package(s) announced via the USN-5091-1 advisory.
Description:	Summary: The remote host is missing an update for the 'linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-gke, linux-gke-5.4, linux-gkeop, linux-gkeop-5.4, linux-hwe-5.4, linux-kvm, linux-oracle, linux-oracle-5.4' package(s) announced via the USN-5091-1 advisory. Vulnerability Insight: Ofek Kirzner, Adam Morrison, Benedict Schlueter, and Piotr Krysiuk discovered that the BPF verifier in the Linux kernel missed possible mispredicted branches due to type confusion, allowing a side-channel attack. An attacker could use this to expose sensitive information. (CVE-2021-33624) It was discovered that the tracing subsystem in the Linux kernel did not properly keep track of per-cpu ring buffer state. A privileged attacker could use this to cause a denial of service. (CVE-2021-3679) Alexey Kardashevskiy discovered that the KVM implementation for PowerPC systems in the Linux kernel did not properly validate RTAS arguments in some situations. An attacker in a guest vm could use this to cause a denial of service (host OS crash) or possibly execute arbitrary code. (CVE-2021-37576) It was discovered that the Virtio console implementation in the Linux kernel did not properly validate input lengths in some situations. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2021-38160) Michael Wakabayashi discovered that the NFSv4 client implementation in the Linux kernel did not properly order connection setup operations. An attacker controlling a remote NFS server could use this to cause a denial of service on the client. (CVE-2021-38199) It was discovered that the MAX-3421 host USB device driver in the Linux kernel did not properly handle device removal events. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2021-38204) Affected Software/OS: 'linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-gke, linux-gke-5.4, linux-gkeop, linux-gkeop-5.4, linux-hwe-5.4, linux-kvm, linux-oracle, linux-oracle-5.4' package(s) on Ubuntu 18.04, 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-2021-33624 https://www.usenix.org/conference/usenixsecurity21/presentation/kirzner https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html Common Vulnerability Exposure (CVE) ID: CVE-2021-3679 Debian Security Information: DSA-4978 (Google Search) https://www.debian.org/security/2021/dsa-4978 https://bugzilla.redhat.com/show_bug.cgi?id=1989165 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=67f0d6d9883c13174669f88adac4f0ee656cc16a https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html Common Vulnerability Exposure (CVE) ID: CVE-2021-37576 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WDFA7DSQIPM7XPNXJBXFWXHJFVUBCAG6/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/Z2YZ2DNURMYYVDT2NYAFDESJC35KCUDS/ https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f62f3c20647ebd5fb6ecb8f0b477b9281c44c10a https://lore.kernel.org/linuxppc-dev/87im0x1lqi.fsf@mpe.ellerman.id.au/T/#u http://www.openwall.com/lists/oss-security/2021/07/27/2 Common Vulnerability Exposure (CVE) ID: CVE-2021-38160 https://access.redhat.com/security/cve/cve-2021-38160 https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4 https://github.com/torvalds/linux/commit/d00d8da5869a2608e97cfede094dfc5e11462a46 Common Vulnerability Exposure (CVE) ID: CVE-2021-38199 https://github.com/torvalds/linux/commit/dd99e9f98fbf423ff6d365b37a98e8879170f17c Common Vulnerability Exposure (CVE) ID: CVE-2021-38204 https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.6 https://github.com/torvalds/linux/commit/b5fdf5c6e6bee35837e160c00ac89327bdad031b
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