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AUSCERT External Security Bulletin Redistribution
ESB-2021.3510
Linux kernel (OEM) vulnerabilities
21 October 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: kernel (EOM)
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Denial of Service -- Existing Account
Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-3759 CVE-2021-3753 CVE-2021-3743
CVE-2021-3739
Reference: ESB-2021.3483
ESB-2021.3456
ESB-2021.3422
ESB-2021.3391
Original Bulletin:
https://ubuntu.com/security/notices/USN-5117-1
- --------------------------BEGIN INCLUDED TEXT--------------------
USN-5117-1: Linux kernel (OEM) vulnerabilities
20 October 2021
Several security issues were fixed in the Linux kernel.
Releases
o Ubuntu 20.04 LTS
Packages
o linux-oem-5.13 - Linux kernel for OEM systems
Details
It was discovered that the btrfs file system in the Linux kernel did not
properly handle removing a non-existent device id. An attacker with
CAP_SYS_ADMIN could use this to cause a denial of service. ( CVE-2021-3739 )
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 )
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 20.04
o linux-image-5.13.0-1017-oem - 5.13.0-1017.21
o linux-image-oem-20.04c - 5.13.0.1017.21
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
o CVE-2021-3753
o CVE-2021-3743
o CVE-2021-3739
o CVE-2021-3759
Related notices
o USN-5115-1 : linux-oem-20.04, linux-oem-5.10, linux-oem-20.04-edge,
linux-headers-oem-20.04, linux-tools-oem-20.04, linux-tools-oem-20.04-edge,
linux-image-oem-20.04-edge, linux-oem-20.04b, linux-image-5.10.0-1050-oem,
linux-buildinfo-5.10.0-1050-oem, linux-tools-5.10.0-1050-oem,
linux-image-unsigned-5.10.0-1050-oem, linux-image-oem-20.04,
linux-oem-5.10-tools-5.10.0-1050, linux-image-oem-20.04b,
linux-oem-5.10-tools-host, linux-tools-oem-20.04b,
linux-modules-5.10.0-1050-oem, linux-oem-5.10-headers-5.10.0-1050,
linux-headers-oem-20.04b, linux-headers-oem-20.04-edge,
linux-headers-5.10.0-1050-oem
o USN-5113-1 : linux-headers-generic-hwe-20.04-edge,
linux-image-5.11.0-1018-kvm, linux-headers-5.11.0-1021-raspi-nolpae,
linux-cloud-tools-azure, linux-generic-hwe-20.04-edge,
linux-tools-5.11.0-38-generic-lpae, linux-cloud-tools-generic,
linux-tools-aws, linux-headers-oem-20.04, linux-gcp-headers-5.11.0-1021,
linux-image-virtual, linux-buildinfo-5.11.0-1021-raspi-nolpae,
linux-image-generic-lpae, linux-libc-dev, linux-aws,
linux-cloud-tools-azure-edge, linux-image-5.11.0-38-lowlatency,
linux-modules-extra-azure-edge, linux-tools-virtual-hwe-20.04-edge,
linux-hwe-5.11-headers-5.11.0-38, linux-tools-5.11.0-38,
linux-cloud-tools-virtual-hwe-20.04, linux-azure-5.11,
linux-modules-5.11.0-1021-raspi-nolpae, linux-image-oem-20.04,
linux-tools-generic-64k-hwe-20.04, linux-headers-5.11.0-1021-raspi,
linux-image-5.11.0-38-generic-lpae, linux-tools-azure-edge,
linux-tools-virtual-hwe-20.04, linux-aws-edge,
linux-headers-5.11.0-38-generic-64k, linux-headers-lowlatency,
linux-headers-5.11.0-1020-aws, linux-image-unsigned-5.11.0-1021-gcp,
linux-headers-azure, linux-headers-gcp-edge, linux-gcp-5.11,
linux-headers-generic, linux-headers-generic-hwe-20.04,
linux-headers-5.11.0-1018-kvm, linux-headers-5.11.0-38, linux-azure-edge,
linux-image-azure, linux-image-generic-64k-hwe-20.04-edge,
linux-azure-5.11-cloud-tools-5.11.0-1020, linux-kvm-headers-5.11.0-1018,
linux-tools-generic-lpae-hwe-20.04-edge,
linux-cloud-tools-5.11.0-38-lowlatency, linux-tools-gcp,
linux-cloud-tools-lowlatency-hwe-20.04, linux-cloud-tools-lowlatency,
linux-hwe-5.11-tools-5.11.0-38, linux-generic-lpae-hwe-20.04,
linux-headers-generic-64k-hwe-20.04-edge, linux-hwe-5.11-tools-common,
linux-image-gcp-edge, linux-modules-5.11.0-38-generic-lpae,
linux-tools-5.11.0-38-lowlatency,
linux-headers-generic-lpae-hwe-20.04-edge,
linux-image-unsigned-5.11.0-1018-kvm,
linux-tools-lowlatency-hwe-20.04-edge, linux-aws-5.11,
linux-aws-headers-5.11.0-1020, linux-tools-generic-hwe-20.04,
linux-oem-20.04, linux-virtual, linux-virtual-hwe-20.04-edge,
linux-headers-5.11.0-1020-azure, linux-headers-raspi-nolpae,
linux-image-5.11.0-38-generic-64k, linux-headers-raspi,
linux-headers-generic-64k, linux-hwe-5.11-cloud-tools-5.11.0-38,
linux-headers-aws, linux-image-extra-virtual,
linux-tools-generic-hwe-20.04-edge, linux-azure-headers-5.11.0-1020,
linux-headers-generic-lpae-hwe-20.04, linux-buildinfo-5.11.0-1021-raspi,
linux-image-extra-virtual-hwe-20.04-edge, linux-raspi,
linux-buildinfo-5.11.0-1020-aws, linux-azure-5.11-tools-5.11.0-1020,
linux-buildinfo-5.11.0-1020-azure, linux-headers-gke,
linux-hwe-5.11-source-5.11.0, linux-tools-host,
linux-modules-extra-5.11.0-38-generic, linux-tools-virtual,
linux-image-5.11.0-1020-azure, linux-modules-extra-azure,
linux-tools-generic-64k, linux-tools-generic-lpae,
linux-azure-cloud-tools-5.11.0-1020, linux-headers-gcp,
linux-headers-5.11.0-38-generic-lpae, linux-tools-5.11.0-1020-aws,
linux-headers-virtual-hwe-20.04-edge, linux-image-gcp, linux-image-gke,
linux-image-generic-hwe-20.04-edge, linux-source,
linux-modules-extra-aws-edge, linux-headers-azure-edge,
linux-image-lowlatency, linux-image-unsigned-5.11.0-38-generic-64k,
linux-generic-lpae, linux-crashdump, linux-tools-raspi,
linux-modules-extra-gke, linux-image-unsigned-5.11.0-38-generic,
linux-headers-lowlatency-hwe-20.04,
linux-headers-lowlatency-hwe-20.04-edge,
linux-image-unsigned-5.11.0-38-lowlatency, linux-tools-5.11.0-38-generic,
linux-lowlatency-hwe-20.04, linux-kvm, linux-modules-5.11.0-1021-gcp,
linux-tools-5.11.0-1018-kvm, linux-headers-virtual, linux-tools-oem-20.04,
linux-tools-gke, linux-image-5.11.0-1021-gcp,
linux-cloud-tools-5.11.0-38-generic, linux-modules-5.11.0-38-lowlatency,
linux-image-virtual-hwe-20.04-edge, linux-gcp-edge,
linux-cloud-tools-virtual, linux-tools-gcp-edge, linux-tools-raspi-nolpae,
linux-azure-5.11-headers-5.11.0-1020, linux-generic-64k-hwe-20.04-edge,
linux-gcp-5.11-headers-5.11.0-1021, linux-modules-5.11.0-38-generic-64k,
linux-cloud-tools-generic-hwe-20.04, linux-image-extra-virtual-hwe-20.04,
linux-buildinfo-5.11.0-38-lowlatency, linux-buildinfo-5.11.0-1018-kvm,
linux-tools-common, linux-tools-kvm, linux-modules-5.11.0-1020-aws,
linux-headers-aws-edge, linux-cloud-tools-virtual-hwe-20.04-edge,
linux-image-azure-edge, linux-modules-5.11.0-38-generic,
linux-image-unsigned-5.11.0-1020-azure, linux-image-generic,
linux-headers-kvm, linux-tools-generic, linux-image-generic-lpae-hwe-20.04,
linux-image-generic-64k, linux-generic-lpae-hwe-20.04-edge,
linux-hwe-5.11-cloud-tools-common, linux-aws-cloud-tools-5.11.0-1020,
linux-generic, linux-cloud-tools-5.11.0-1020-azure, linux-hwe-5.11,
linux-image-5.11.0-1020-aws, linux-image-kvm, linux-image-aws,
linux-tools-generic-lpae-hwe-20.04, linux-buildinfo-5.11.0-38-generic-64k,
linux-headers-virtual-hwe-20.04, linux-modules-extra-5.11.0-1021-gcp,
linux, linux-source-5.11.0, linux-modules-5.11.0-1018-kvm,
linux-buildinfo-5.11.0-1021-gcp, linux-modules-extra-aws,
linux-tools-azure, linux-azure-tools-5.11.0-1020,
linux-image-5.11.0-1021-raspi, linux-image-lowlatency-hwe-20.04-edge,
linux-headers-5.11.0-38-generic, linux-generic-hwe-20.04,
linux-tools-5.11.0-1021-raspi, linux-tools-5.11.0-1021-raspi-nolpae,
linux-buildinfo-5.11.0-38-generic, linux-generic-64k, linux-image-raspi,
linux-headers-generic-lpae, linux-image-lowlatency-hwe-20.04,
linux-modules-5.11.0-1020-azure, linux-gcp, linux-lowlatency,
linux-image-aws-edge, linux-headers-5.11.0-38-lowlatency,
linux-image-raspi-nolpae, linux-tools-lowlatency, linux-cloud-tools-common,
linux-tools-aws-edge, linux-lowlatency-hwe-20.04-edge,
linux-tools-generic-64k-hwe-20.04-edge, linux-cloud-tools-5.11.0-38,
linux-virtual-hwe-20.04, linux-hwe-5.11-tools-host, linux-gke, linux-azure,
linux-gcp-5.11-tools-5.11.0-1021, linux-modules-extra-5.11.0-1020-aws,
linux-aws-5.11-tools-5.11.0-1020,
linux-cloud-tools-lowlatency-hwe-20.04-edge,
linux-cloud-tools-5.11.0-1020-aws, linux-image-generic-64k-hwe-20.04,
linux-image-generic-lpae-hwe-20.04-edge,
linux-image-5.11.0-1021-raspi-nolpae,
linux-cloud-tools-generic-hwe-20.04-edge, linux-image-virtual-hwe-20.04,
linux-tools-lowlatency-hwe-20.04, linux-modules-extra-gcp,
linux-headers-generic-64k-hwe-20.04, linux-image-generic-hwe-20.04,
linux-kvm-tools-5.11.0-1018, linux-aws-5.11-cloud-tools-5.11.0-1020,
linux-raspi-headers-5.11.0-1021, linux-buildinfo-5.11.0-38-generic-lpae,
linux-tools-5.11.0-1021-gcp, linux-tools-5.11.0-38-generic-64k,
linux-image-5.11.0-38-generic, linux-headers-5.11.0-1021-gcp,
linux-modules-5.11.0-1021-raspi, linux-aws-5.11-headers-5.11.0-1020,
linux-modules-extra-5.11.0-1020-azure, linux-raspi-nolpae, linux-doc,
linux-generic-64k-hwe-20.04, linux-raspi-tools-5.11.0-1021,
linux-tools-5.11.0-1020-azure, linux-gcp-tools-5.11.0-1021,
linux-modules-extra-gcp-edge, linux-aws-tools-5.11.0-1020
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