[USN-4979-1] Linux kernel vulnerabilities

========================================================================== Ubuntu Security Notice USN-4979-1 June 03, 2021
linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp, linux-gcp-4.15, linux-hwe, linux-kvm, linux-oracle, 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-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-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:
Kiyin (尹亮) discovered that the NFC LLCP protocol implementation in the Linux kernel contained a reference counting error. A local attacker could use this to cause a denial of service (system crash). (CVE-2020-25670)
Kiyin (尹亮) discovered that the NFC LLCP protocol implementation in the Linux kernel did not properly deallocate memory in certain error situations. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2020-25671, CVE-2020-25672)
Kiyin (尹亮) discovered that the NFC LLCP protocol implementation in the Linux kernel did not properly handle error conditions in some situations, leading to an infinite loop. A local attacker could use this to cause a denial of service. (CVE-2020-25673)
It was discovered that the Realtek RTL8188EU Wireless device driver in the Linux kernel did not properly validate ssid lengths in some situations. An attacker could use this to cause a denial of service (system crash). (CVE-2021-28660)
Zygo Blaxell discovered that the btrfs file system implementation in the Linux kernel contained a race condition during certain cloning operations. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2021-28964)
Vince Weaver discovered that the perf subsystem in the Linux kernel did not properly handle certain PEBS records properly for some Intel Haswell processors. A local attacker could use this to cause a denial of service (system crash). (CVE-2021-28971)
It was discovered that the RPA PCI Hotplug driver implementation in the Linux kernel did not properly handle device name writes via sysfs, leading to a buffer overflow. A privileged attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-28972)
It was discovered that the Qualcomm IPC router implementation in the Linux kernel did not properly initialize memory passed to user space. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2021-29647)
Dan Carpenter discovered that the block device manager (dm) implementation in the Linux kernel contained a buffer overflow in the ioctl for listing devices. A privileged local attacker could use this to cause a denial of service (system crash). (CVE-2021-31916)
It was discovered that the CIPSO implementation in the Linux kernel did not properly perform reference counting in some situations, leading to use- after-free vulnerabilities. An attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-33033)
Wolfgang Frisch discovered that the ext4 file system implementation in the Linux kernel contained an integer overflow when handling metadata inode extents. An attacker could use this to construct a malicious ext4 file system image that, when mounted, could cause a denial of service (system crash). (CVE-2021-3428)
马哲宇 discovered that the IEEE 1394 (Firewire) nosy packet sniffer driver in the Linux kernel did not properly perform reference counting in some situations, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-3483)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 18.04 LTS: linux-image-4.15.0-1072-oracle 4.15.0-1072.80 linux-image-4.15.0-1092-kvm 4.15.0-1092.94 linux-image-4.15.0-1100-gcp 4.15.0-1100.113 linux-image-4.15.0-1103-aws 4.15.0-1103.110 linux-image-4.15.0-1103-snapdragon 4.15.0-1103.112 linux-image-4.15.0-1115-azure 4.15.0-1115.128 linux-image-4.15.0-144-generic 4.15.0-144.148 linux-image-4.15.0-144-generic-lpae 4.15.0-144.148 linux-image-4.15.0-144-lowlatency 4.15.0-144.148 linux-image-aws-lts-18.04 4.15.0.1103.106 linux-image-azure-lts-18.04 4.15.0.1115.88 linux-image-gcp-lts-18.04 4.15.0.1100.118 linux-image-generic 4.15.0.144.131 linux-image-generic-lpae 4.15.0.144.131 linux-image-kvm 4.15.0.1092.88 linux-image-lowlatency 4.15.0.144.131 linux-image-oracle-lts-18.04 4.15.0.1072.82 linux-image-snapdragon 4.15.0.1103.106 linux-image-virtual 4.15.0.144.131
Ubuntu 16.04 ESM: linux-image-4.15.0-1072-oracle 4.15.0-1072.80~16.04.1 linux-image-4.15.0-1100-gcp 4.15.0-1100.113~16.04.1 linux-image-4.15.0-1103-aws 4.15.0-1103.110~16.04.1 linux-image-4.15.0-1115-azure 4.15.0-1115.128~16.04.1 linux-image-4.15.0-144-generic 4.15.0-144.148~16.04.1 linux-image-4.15.0-144-lowlatency 4.15.0-144.148~16.04.1 linux-image-aws-hwe 4.15.0.1103.94 linux-image-azure 4.15.0.1115.106 linux-image-gcp 4.15.0.1100.101 linux-image-generic-hwe-16.04 4.15.0.144.140 linux-image-gke 4.15.0.1100.101 linux-image-lowlatency-hwe-16.04 4.15.0.144.140 linux-image-oem 4.15.0.144.140 linux-image-oracle 4.15.0.1072.60 linux-image-virtual-hwe-16.04 4.15.0.144.140
Ubuntu 14.04 ESM: linux-image-4.15.0-1115-azure 4.15.0-1115.128~14.04.1 linux-image-azure 4.15.0.1115.88
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-4979-1 CVE-2020-25670, CVE-2020-25671, CVE-2020-25672, CVE-2020-25673, CVE-2021-28660, CVE-2021-28964, CVE-2021-28971, CVE-2021-28972, CVE-2021-29647, CVE-2021-31916, CVE-2021-33033, CVE-2021-3428, CVE-2021-3483
Package Information: launchpad.net/ubuntu/+source/linux/4.15.0-144.148 launchpad.net/ubuntu/+source/linux-aws/4.15.0-1103.110 launchpad.net/ubuntu/+source/linux-azure-4.15/4.15.0-1115.128 launchpad.net/ubuntu/+source/linux-gcp-4.15/4.15.0-1100.113 launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1092.94 launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1072.80 launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1103.112