[USN-5136-1] Linux kernel vulnerabilities

========================================================================== Ubuntu Security Notice USN-5136-1 November 09, 2021
linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-dell300x, linux-gcp-4.15, linux-hwe, linux-kvm, 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 ESM – 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-dell300x: Linux kernel for Dell 300x platforms – linux-gcp-4.15: Linux kernel for Google Cloud Platform (GCP) systems – linux-kvm: Linux kernel for cloud environments – linux-oracle: Linux kernel for Oracle Cloud systems – linux-raspi2: Linux kernel for Raspberry Pi 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-hwe: Linux hardware enablement (HWE) kernel
Details:
It was discovered that the f2fs file system in the Linux kernel did not properly validate metadata in some situations. An attacker could use this to construct a malicious f2fs image that, when mounted and operated on, could cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-19449)
It was discovered that the FUSE user space file system implementation in the Linux kernel did not properly handle bad inodes in some situations. A local attacker could possibly use this to cause a denial of service. (CVE-2020-36322)
It was discovered that the Infiniband RDMA userspace connection manager implementation in the Linux kernel contained a race condition leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possible execute arbitrary code. (CVE-2020-36385)
Ilja Van Sprundel discovered that the SCTP implementation in the Linux kernel did not properly perform size validations on incoming packets in some situations. An attacker could possibly use this to expose sensitive information (kernel memory). (CVE-2021-3655)
It was discovered that the Qualcomm IPC Router protocol implementation in the Linux kernel did not properly validate metadata in some situations. A local attacker could use this to cause a denial of service (system crash) or expose sensitive information. (CVE-2021-3743)
It was discovered that the virtual terminal (vt) device implementation in the Linux kernel contained a race condition in its ioctl handling that led to an out-of-bounds read vulnerability. A local attacker could possibly use this to expose sensitive information. (CVE-2021-3753)
It was discovered that the Linux kernel did not properly account for the memory usage of certain IPC objects. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2021-3759)
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 Aspeed Low Pin Count (LPC) Bus Controller implementation in the Linux kernel did not properly perform boundary checks in some situations, allowing out-of-bounds write access. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. In Ubuntu, this issue only affected systems running armhf kernels. (CVE-2021-42252)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 18.04 LTS: linux-image-4.15.0-1030-dell300x 4.15.0-1030.35 linux-image-4.15.0-1083-oracle 4.15.0-1083.91 linux-image-4.15.0-1098-raspi2 4.15.0-1098.104 linux-image-4.15.0-1102-kvm 4.15.0-1102.104 linux-image-4.15.0-1111-gcp 4.15.0-1111.125 linux-image-4.15.0-1115-aws 4.15.0-1115.122 linux-image-4.15.0-1115-snapdragon 4.15.0-1115.124 linux-image-4.15.0-1126-azure 4.15.0-1126.139 linux-image-4.15.0-162-generic 4.15.0-162.170 linux-image-4.15.0-162-generic-lpae 4.15.0-162.170 linux-image-4.15.0-162-lowlatency 4.15.0-162.170 linux-image-aws-lts-18.04 4.15.0.1115.118 linux-image-azure-lts-18.04 4.15.0.1126.99 linux-image-dell300x 4.15.0.1030.32 linux-image-gcp-lts-18.04 4.15.0.1111.130 linux-image-generic 4.15.0.162.151 linux-image-generic-lpae 4.15.0.162.151 linux-image-kvm 4.15.0.1102.98 linux-image-lowlatency 4.15.0.162.151 linux-image-oracle-lts-18.04 4.15.0.1083.93 linux-image-raspi2 4.15.0.1098.96 linux-image-snapdragon 4.15.0.1115.118 linux-image-virtual 4.15.0.162.151
Ubuntu 16.04 ESM: linux-image-4.15.0-1083-oracle 4.15.0-1083.91~16.04.1 linux-image-4.15.0-1115-aws 4.15.0-1115.122~16.04.1 linux-image-4.15.0-1126-azure 4.15.0-1126.139~16.04.1 linux-image-4.15.0-162-generic 4.15.0-162.170~16.04.1 linux-image-4.15.0-162-lowlatency 4.15.0-162.170~16.04.1 linux-image-aws-hwe 4.15.0.1115.105 linux-image-azure 4.15.0.1126.117 linux-image-generic-hwe-16.04 4.15.0.162.155 linux-image-lowlatency-hwe-16.04 4.15.0.162.155 linux-image-oem 4.15.0.162.155 linux-image-oracle 4.15.0.1083.71 linux-image-virtual-hwe-16.04 4.15.0.162.155
Ubuntu 14.04 ESM: linux-image-4.15.0-1126-azure 4.15.0-1126.139~14.04.1 linux-image-azure 4.15.0.1126.99
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: ubuntu.com/security/notices/USN-5136-1 CVE-2019-19449, CVE-2020-36322, CVE-2020-36385, CVE-2021-3655, CVE-2021-3743, CVE-2021-3753, CVE-2021-3759, CVE-2021-38199, CVE-2021-42252
Package Information: launchpad.net/ubuntu/+source/linux/4.15.0-162.170 launchpad.net/ubuntu/+source/linux-aws/4.15.0-1115.122 launchpad.net/ubuntu/+source/linux-azure-4.15/4.15.0-1126.139 launchpad.net/ubuntu/+source/linux-dell300x/4.15.0-1030.35 launchpad.net/ubuntu/+source/linux-gcp-4.15/4.15.0-1111.125 launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1102.104 launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1083.91 launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1098.104 launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1115.124