来源：Ubuntu官网
发布日期：2020-09-03
阅读次数：2317
评论：0
更新标题
USN-4485-1: Linux kernel vulnerabilities
更新详情
linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp, linux-gcp-4.15, linux-gke-4.15, linux-hwe, linux-kvm, linux-oem, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
Ubuntu 18.04 LTS
Ubuntu 16.04 LTS
Ubuntu 14.04 ESM
Summary
Several security issues were fixed in the Linux kernel.
Software Description
linux - Linux kernel
linux-aws - Linux kernel for Amazon Web Services (AWS) systems
linux-azure-4.15 - Linux kernel for Microsoft Azure Cloud systems
linux-gcp-4.15 - Linux kernel for Google Cloud Platform (GCP) systems
linux-gke-4.15 - Linux kernel for Google Container Engine (GKE) systems
linux-kvm - Linux kernel for cloud environments
linux-oem - Linux kernel for OEM systems
linux-oracle - Linux kernel for Oracle Cloud systems
linux-raspi2 - Linux kernel for Raspberry Pi (V8) systems
linux-snapdragon - Linux kernel for Qualcomm Snapdragon processors
linux-aws-hwe - Linux kernel for Amazon Web Services (AWS-HWE) systems
linux-azure - Linux kernel for Microsoft Azure Cloud systems
linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
linux-hwe - Linux hardware enablement (HWE) kernel
Details
Timothy Michaud discovered that the i915 graphics driver in the Linux kernel did not properly validate user memory locations for the i915_gem_execbuffer2_ioctl. A local attacker could possibly use this to cause a denial of service or execute arbitrary code. (CVE-2018-20669)
It was discovered that the Kvaser CAN/USB driver in the Linux kernel did not properly initialize memory in certain situations. A local attacker could possibly use this to expose sensitive information (kernel memory). (CVE-2019-19947)
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)
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)
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)
Luca Bruno discovered that the zram module in the Linux kernel did not properly restrict unprivileged users from accessing the hot_add sysfs file. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2020-10781)
It was discovered that the XFS file system implementation in the Linux kernel did not properly validate meta data in some circumstances. An attacker could use this to construct a malicious XFS image that, when mounted, could cause a denial of service. (CVE-2020-12655)
It was discovered that the bcache subsystem in the Linux kernel did not properly release a lock in some error conditions. A local attacker could possibly use this to cause a denial of service. (CVE-2020-12771)
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)
Kyungtae Kim discovered that the USB testing driver in the Linux kernel did not properly deallocate memory on disconnect events. A physically proximate attacker could use this to cause a denial of service (memory exhaustion). (CVE-2020-15393)
It was discovered that the NFS server implementation in the Linux kernel did not properly honor umask settings when setting permissions while creating file system objects if the underlying file system did not support ACLs. An attacker could possibly use this to expose sensitive information or violate system integrity. (CVE-2020-24394)
It was discovered that the Kerberos SUNRPC GSS implementation in the Linux kernel did not properly deallocate memory on module unload. A local privileged attacker could possibly use this to cause a denial of service (memory exhaustion). (CVE-2020-12656)
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 18.04 LTS
linux-image-4.15.0-1051-oracle - 4.15.0-1051.55
linux-image-4.15.0-1067-gke - 4.15.0-1067.70
linux-image-4.15.0-1068-raspi2 - 4.15.0-1068.72
linux-image-4.15.0-1072-kvm - 4.15.0-1072.73
linux-image-4.15.0-1080-aws - 4.15.0-1080.84
linux-image-4.15.0-1081-gcp - 4.15.0-1081.92
linux-image-4.15.0-1084-snapdragon - 4.15.0-1084.92
linux-image-4.15.0-1093-azure - 4.15.0-1093.103
linux-image-4.15.0-1094-oem - 4.15.0-1094.104
linux-image-4.15.0-115-generic - 4.15.0-115.116
linux-image-4.15.0-115-generic-lpae - 4.15.0-115.116
linux-image-4.15.0-115-lowlatency - 4.15.0-115.116
linux-image-aws-lts-18.04 - 4.15.0.1080.82
linux-image-azure-lts-18.04 - 4.15.0.1093.67
linux-image-gcp-lts-18.04 - 4.15.0.1081.99
linux-image-generic - 4.15.0.115.103
linux-image-generic-lpae - 4.15.0.115.103
linux-image-gke - 4.15.0.1067.71
linux-image-gke-4.15 - 4.15.0.1067.71
linux-image-kvm - 4.15.0.1072.68
linux-image-lowlatency - 4.15.0.115.103
linux-image-oem - 4.15.0.1094.98
linux-image-oracle-lts-18.04 - 4.15.0.1051.62
linux-image-powerpc-e500mc - 4.15.0.115.103
linux-image-powerpc-smp - 4.15.0.115.103
linux-image-powerpc64-emb - 4.15.0.115.103
linux-image-powerpc64-smp - 4.15.0.115.103
linux-image-raspi2 - 4.15.0.1068.66
linux-image-snapdragon - 4.15.0.1084.87
linux-image-virtual - 4.15.0.115.103
Ubuntu 16.04 LTS
linux-image-4.15.0-1051-oracle - 4.15.0-1051.55~16.04.1
linux-image-4.15.0-1080-aws - 4.15.0-1080.84~16.04.1
linux-image-4.15.0-1081-gcp - 4.15.0-1081.92~16.04.1
linux-image-4.15.0-1093-azure - 4.15.0-1093.103~16.04.1
linux-image-4.15.0-115-generic - 4.15.0-115.116~16.04.1
linux-image-4.15.0-115-generic-lpae - 4.15.0-115.116~16.04.1
linux-image-4.15.0-115-lowlatency - 4.15.0-115.116~16.04.1
linux-image-aws-hwe - 4.15.0.1080.77
linux-image-azure - 4.15.0.1093.88
linux-image-azure-edge - 4.15.0.1093.88
linux-image-gcp - 4.15.0.1081.83
linux-image-generic-hwe-16.04 - 4.15.0.115.116
linux-image-generic-lpae-hwe-16.04 - 4.15.0.115.116
linux-image-gke - 4.15.0.1081.83
linux-image-lowlatency-hwe-16.04 - 4.15.0.115.116
linux-image-oem - 4.15.0.115.116
linux-image-oracle - 4.15.0.1051.42
linux-image-virtual-hwe-16.04 - 4.15.0.115.116
Ubuntu 14.04 ESM
linux-image-4.15.0-1093-azure - 4.15.0-1093.103~14.04.1
linux-image-azure - 4.15.0.1093.70
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-2018-20669
CVE-2019-19947
CVE-2019-20810
CVE-2020-10732
CVE-2020-10766
CVE-2020-10767
CVE-2020-10768
CVE-2020-10781
CVE-2020-12655
CVE-2020-12656
CVE-2020-12771
CVE-2020-13974
CVE-2020-15393
CVE-2020-24394
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软件描述
Ubuntu是一个以桌面应用为主的Linux操作系统
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