ID de Prueba:	1.3.6.1.4.1.25623.1.0.845099
Categoría:	Ubuntu Local Security Checks
Título:	Ubuntu: Security Advisory (USN-5091-3)
Resumen:	The remote host is missing an update for the 'linux-azure, linux-azure-5.4' package(s) announced via the USN-5091-3 advisory.
Descripción:	Summary: The remote host is missing an update for the 'linux-azure, linux-azure-5.4' package(s) announced via the USN-5091-3 advisory. Vulnerability Insight: USN-5091-1 fixed vulnerabilities in Linux 5.4-based kernels. Unfortunately, for Linux kernels intended for use within Microsoft Azure environments, that update introduced a regression that could cause the kernel to fail to boot in large Azure instance types. This update fixes the problem. We apologize for the inconvenience. Original advisory details: 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-azure, linux-azure-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
Referencia Cruzada:	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
Copyright	Copyright (C) 2021 Greenbone AG

Esta es sólo una de 146377 pruebas de vulnerabilidad en nuestra serie de pruebas. Encuentre más sobre cómo ejecutar una auditoría de seguridad completa. Para ejecutar una prueba gratuita de esta vulnerabilidad contra su sistema, regístrese ahora.