USN-5466-1: Linux kernel vulnerabilities
==========================================================================
Ubuntu Security Notice USN-5466-1
June 08, 2022
linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp,
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-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-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-hwe: Linux hardware enablement (HWE) kernel
Details:
It was discovered that the Linux kernel did not properly restrict access to
the kernel debugger when booted in secure boot environments. A privileged
attacker could use this to bypass UEFI Secure Boot restrictions.
(CVE-2022-21499)
Aaron Adams discovered that the netfilter subsystem in the Linux kernel did
not properly handle the removal of stateful expressions 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 execute arbitrary code.
(CVE-2022-1966)
It was discovered that the SCTP protocol implementation in the Linux kernel
did not properly verify VTAGs in some situations. A remote attacker could
possibly use this to cause a denial of service (connection disassociation).
(CVE-2021-3772)
It was discovered that the btrfs file system implementation in the Linux
kernel did not properly handle locking in certain error conditions. A local
attacker could use this to cause a denial of service (kernel deadlock).
(CVE-2021-4149)
David Bouman discovered that the netfilter subsystem in the Linux kernel
did not initialize memory in some situations. A local attacker could use
this to expose sensitive information (kernel memory). (CVE-2022-1016)
It was discovered that the virtual graphics memory manager implementation
in the Linux kernel was subject to a race condition, potentially leading to
an information leak. (CVE-2022-1419)
赵子轩 discovered that the 802.2 LLC type 2 driver in the Linux kernel did not
properly perform reference counting in some error conditions. A local
attacker could use this to cause a denial of service. (CVE-2022-28356)
It was discovered that the EMS CAN/USB interface implementation in the
Linux kernel contained a double-free vulnerability when handling certain
error conditions. A local attacker could use this to cause a denial of
service (memory exhaustion). (CVE-2022-28390)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 18.04 LTS:
linux-image-4.15.0-1098-oracle 4.15.0-1098.108
linux-image-4.15.0-1114-raspi2 4.15.0-1114.122
linux-image-4.15.0-1119-kvm 4.15.0-1119.123
linux-image-4.15.0-1132-snapdragon 4.15.0-1132.142
linux-image-4.15.0-1133-aws 4.15.0-1133.143
linux-image-4.15.0-1142-azure 4.15.0-1142.156
linux-image-4.15.0-184-generic 4.15.0-184.194
linux-image-4.15.0-184-generic-lpae 4.15.0-184.194
linux-image-4.15.0-184-lowlatency 4.15.0-184.194
linux-image-aws-lts-18.04 4.15.0.1133.135
linux-image-azure-lts-18.04 4.15.0.1142.114
linux-image-generic 4.15.0.184.172
linux-image-generic-lpae 4.15.0.184.172
linux-image-kvm 4.15.0.1119.114
linux-image-lowlatency 4.15.0.184.172
linux-image-oracle-lts-18.04 4.15.0.1098.107
linux-image-raspi2 4.15.0.1114.111
linux-image-snapdragon 4.15.0.1132.133
linux-image-virtual 4.15.0.184.172
Ubuntu 16.04 ESM:
linux-image-4.15.0-1098-oracle 4.15.0-1098.108~16.04.1
linux-image-4.15.0-1127-gcp 4.15.0-1127.142~16.04.1
linux-image-4.15.0-1133-aws-hwe 4.15.0-1133.143~16.04.1
linux-image-4.15.0-1142-azure 4.15.0-1142.156~16.04.1
linux-image-4.15.0-184-generic 4.15.0-184.194~16.04.1
linux-image-4.15.0-184-lowlatency 4.15.0-184.194~16.04.1
linux-image-aws-hwe 4.15.0.1133.122
linux-image-azure 4.15.0.1142.131
linux-image-gcp 4.15.0.1127.126
linux-image-generic-hwe-16.04 4.15.0.184.173
linux-image-gke 4.15.0.1127.126
linux-image-lowlatency-hwe-16.04 4.15.0.184.173
linux-image-oem 4.15.0.184.173
linux-image-oracle 4.15.0.1098.85
linux-image-virtual-hwe-16.04 4.15.0.184.173
Ubuntu 14.04 ESM:
linux-image-4.15.0-1142-azure 4.15.0-1142.156~14.04.1
linux-image-azure 4.15.0.1142.113
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:
https://ubuntu.com/security/notices/USN-5466-1
CVE-2021-3772, CVE-2021-4149, CVE-2022-1016, CVE-2022-1419,
CVE-2022-1966, CVE-2022-21499, CVE-2022-28356, CVE-2022-28390
Package Information:
https://launchpad.net/ubuntu/+source/linux/4.15.0-184.194
https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1133.143
https://launchpad.net/ubuntu/+source/linux-azure-4.15/4.15.0-1142.156
https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1119.123
https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1098.108
https://launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1114.122
https://launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1132.142
A Linux kernel security update has been released for Ubuntu Linux 14.04 ESM, 16.04 ESM, and 18.04 LTS.
