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Ubuntu - linux kernel vulnerabilities (2020-07-31)

来源:Ubuntu官网 发布日期:2020-07-31 阅读次数:1597 评论:0

基本信息

发布日期:2020-07-31(官方当地时间)

更新类型:安全更新

更新版本:未知

感知时间:2020-07-31 10:01:23

风险等级:未知

情报贡献:TSRC

更新标题

USN-4440-1: linux kernel vulnerabilities

更新详情

linux-hwe, linux-aws-5.3, linux-azure-5.3, linux-gcp-5.3, linux-gke-5.3, linux-hwe, linux-oracle-5.3, linux-raspi2-5.3 vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
Ubuntu 18.04 LTS
Summary
Several security issues were fixed in the Linux kernel.
Software Description
linux-aws-5.3 - Linux kernel for Amazon Web Services (AWS) systems
linux-azure-5.3 - Linux kernel for microsoft azure cloud systems
linux-gcp-5.3 - Linux kernel for Google Cloud Platform (GCP) systems
linux-gke-5.3 - Linux kernel for Google Container Engine (GKE) systems
linux-hwe - Linux hardware enablement (HWE) kernel
linux-oracle-5.3 - Linux kernel for Oracle Cloud systems
linux-raspi2-5.3 - Linux kernel for Raspberry Pi (V7) systems
Details
It was discovered that the network block device (nbd) implementation in the Linux kernel did not properly check for error conditions in some situations. An attacker could possibly use this to cause a denial of service (system crash). (CVE-2019-16089)
It was discovered that the kernel->user space relay implementation in the Linux kernel did not properly check return values in some situations. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2019-19462)
Chuhong Yuan discovered that go7007 USB audio device driver in the Linux kernel did not properly deallocate memory in some failure conditions. A physically proximate attacker could use this to cause a denial of service (memory exhaustion). (CVE-2019-20810)
Jason A. Donenfeld discovered that the ACPI implementation in the Linux kernel did not properly restrict loading SSDT code from an EFI variable. A privileged attacker could use this to bypass Secure Boot lockdown restrictions and execute arbitrary code in the kernel. (CVE-2019-20908)
It was discovered that the elf handling code in the Linux kernel did not initialize memory before using it in certain situations. A local attacker could use this to possibly expose sensitive information (kernel memory). (CVE-2020-10732)
Fan Yang discovered that the mremap implementation in the Linux kernel did not properly handle DAX Huge Pages. A local attacker with access to DAX storage could use this to gain administrative privileges. (CVE-2020-10757)
It was discovered that the Linux kernel did not correctly apply Speculative Store Bypass Disable (SSBD) mitigations in certain situations. A local attacker could possibly use this to expose sensitive information. (CVE-2020-10766)
It was discovered that the Linux kernel did not correctly apply Indirect Branch Predictor Barrier (IBPB) mitigations in certain situations. A local attacker could possibly use this to expose sensitive information. (CVE-2020-10767)
It was discovered that the Linux kernel could incorrectly enable indirect branch speculation after it has been disabled for a process via a prctl() call. A local attacker could possibly use this to expose sensitive information. (CVE-2020-10768)
Mauricio Faria de Oliveira discovered that the aufs implementation in the Linux kernel improperly managed inode reference counts in the vfsub_dentry_open() method. A local attacker could use this vulnerability to cause a denial of service. (CVE-2020-11935)
It was discovered that the Virtual Terminal keyboard driver in the Linux kernel contained an integer overflow. A local attacker could possibly use this to have an unspecified impact. (CVE-2020-13974)
Jason A. Donenfeld discovered that the ACPI implementation in the Linux kernel did not properly restrict loading ACPI tables via configfs. A privileged attacker could use this to bypass Secure Boot lockdown restrictions and execute arbitrary code in the kernel. (CVE-2020-15780)
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 18.04 LTS
linux-image-5.3.0-1030-oracle - 5.3.0-1030.32~18.04.1
linux-image-5.3.0-1030-raspi2 - 5.3.0-1030.32~18.04.2
linux-image-5.3.0-1032-aws - 5.3.0-1032.34~18.04.2
linux-image-5.3.0-1032-gcp - 5.3.0-1032.34~18.04.1
linux-image-5.3.0-1032-gke - 5.3.0-1032.34~18.04.1
linux-image-5.3.0-1034-azure - 5.3.0-1034.35~18.04.1
linux-image-5.3.0-64-generic - 5.3.0-64.58~18.04.1
linux-image-5.3.0-64-generic-lpae - 5.3.0-64.58~18.04.1
linux-image-5.3.0-64-lowlatency - 5.3.0-64.58~18.04.1
linux-image-aws - 5.3.0.1032.31
linux-image-azure - 5.3.0.1034.30
linux-image-gcp - 5.3.0.1032.26
linux-image-gke-5.3 - 5.3.0.1032.17
linux-image-gkeop-5.3 - 5.3.0.64.120
linux-image-oracle - 5.3.0.1030.27
linux-image-raspi2-hwe-18.04 - 5.3.0.1030.20
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to reboot your computer to make all the necessary changes.
ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well.
References
CVE-2019-16089
CVE-2019-19462
CVE-2019-20810
CVE-2019-20908
CVE-2020-10732
CVE-2020-10757
CVE-2020-10766
CVE-2020-10767
CVE-2020-10768
CVE-2020-11935
CVE-2020-13974
CVE-2020-15780
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Ubuntu是一个以桌面应用为主的Linux操作系统

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