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Ubuntu Security Notice USN-5161-1

Ubuntu Security Notice USN-5161-1
Posted Dec 1, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5161-1 - 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. It was discovered that the AMD Cryptographic Coprocessor driver in the Linux kernel did not properly deallocate memory in some error conditions. A local attacker could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2021-3655, CVE-2021-42252
SHA-256 | 35333c4428527b3f750e7ef00956677d52b5e606751d753665346da51586f3a3

Ubuntu Security Notice USN-5161-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-5161-1
November 30, 2021

linux, linux-aws, linux-aws-5.11, linux-azure, linux-azure-5.11,
linux-gcp, linux-gcp-5.11, linux-hwe-5.11, linux-kvm, linux-oracle,
linux-oracle-5.11, linux-raspi vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 21.04
- Ubuntu 20.04 LTS

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: Linux kernel for Microsoft Azure Cloud systems
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-kvm: Linux kernel for cloud environments
- linux-oracle: Linux kernel for Oracle Cloud systems
- linux-raspi: Linux kernel for Raspberry Pi systems
- linux-aws-5.11: Linux kernel for Amazon Web Services (AWS) systems
- linux-azure-5.11: Linux kernel for Microsoft Azure cloud systems
- linux-gcp-5.11: Linux kernel for Google Cloud Platform (GCP) systems
- linux-hwe-5.11: Linux hardware enablement (HWE) kernel
- linux-oracle-5.11: Linux kernel for Oracle Cloud systems

Details:

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 AMD Cryptographic Coprocessor (CCP) driver in
the Linux kernel did not properly deallocate memory in some error
conditions. A local attacker could use this to cause a denial of service
(memory exhaustion). (CVE-2021-3744, CVE-2021-3764)

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 21.04:
linux-image-5.11.0-1020-kvm 5.11.0-1020.22
linux-image-5.11.0-1022-aws 5.11.0-1022.23
linux-image-5.11.0-1022-azure 5.11.0-1022.23
linux-image-5.11.0-1022-oracle 5.11.0-1022.23
linux-image-5.11.0-1023-gcp 5.11.0-1023.25
linux-image-5.11.0-1023-raspi 5.11.0-1023.25
linux-image-5.11.0-1023-raspi-nolpae 5.11.0-1023.25
linux-image-5.11.0-41-generic 5.11.0-41.45
linux-image-5.11.0-41-generic-64k 5.11.0-41.45
linux-image-5.11.0-41-generic-lpae 5.11.0-41.45
linux-image-5.11.0-41-lowlatency 5.11.0-41.45
linux-image-aws 5.11.0.1022.23
linux-image-azure 5.11.0.1022.23
linux-image-gcp 5.11.0.1023.23
linux-image-generic 5.11.0.41.42
linux-image-generic-64k 5.11.0.41.42
linux-image-generic-lpae 5.11.0.41.42
linux-image-gke 5.11.0.1023.23
linux-image-kvm 5.11.0.1020.21
linux-image-lowlatency 5.11.0.41.42
linux-image-oem-20.04 5.11.0.41.42
linux-image-oracle 5.11.0.1022.23
linux-image-raspi 5.11.0.1023.21
linux-image-raspi-nolpae 5.11.0.1023.21
linux-image-virtual 5.11.0.41.42

Ubuntu 20.04 LTS:
linux-image-5.11.0-1022-aws 5.11.0-1022.23~20.04.1
linux-image-5.11.0-1022-azure 5.11.0-1022.23~20.04.1
linux-image-5.11.0-1022-oracle 5.11.0-1022.23~20.04.1
linux-image-5.11.0-1023-gcp 5.11.0-1023.25~20.04.1
linux-image-5.11.0-41-generic 5.11.0-41.45~20.04.1
linux-image-5.11.0-41-generic-64k 5.11.0-41.45~20.04.1
linux-image-5.11.0-41-generic-lpae 5.11.0-41.45~20.04.1
linux-image-5.11.0-41-lowlatency 5.11.0-41.45~20.04.1
linux-image-aws 5.11.0.1022.23~20.04.21
linux-image-azure 5.11.0.1022.23~20.04.22
linux-image-gcp 5.11.0.1023.25~20.04.22
linux-image-generic-64k-hwe-20.04 5.11.0.41.45~20.04.19
linux-image-generic-hwe-20.04 5.11.0.41.45~20.04.19
linux-image-generic-lpae-hwe-20.04 5.11.0.41.45~20.04.19
linux-image-lowlatency-hwe-20.04 5.11.0.41.45~20.04.19
linux-image-oracle 5.11.0.1022.23~20.04.15
linux-image-virtual-hwe-20.04 5.11.0.41.45~20.04.19

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-5161-1
CVE-2021-3655, CVE-2021-3744, CVE-2021-3764, CVE-2021-42252

Package Information:
https://launchpad.net/ubuntu/+source/linux/5.11.0-41.45
https://launchpad.net/ubuntu/+source/linux-aws/5.11.0-1022.23
https://launchpad.net/ubuntu/+source/linux-azure/5.11.0-1022.23
https://launchpad.net/ubuntu/+source/linux-gcp/5.11.0-1023.25
https://launchpad.net/ubuntu/+source/linux-kvm/5.11.0-1020.22
https://launchpad.net/ubuntu/+source/linux-oracle/5.11.0-1022.23
https://launchpad.net/ubuntu/+source/linux-raspi/5.11.0-1023.25
https://launchpad.net/ubuntu/+source/linux-aws-5.11/5.11.0-1022.23~20.04.1
https://launchpad.net/ubuntu/+source/linux-azure-5.11/5.11.0-1022.23~20.04.1
https://launchpad.net/ubuntu/+source/linux-gcp-5.11/5.11.0-1023.25~20.04.1
https://launchpad.net/ubuntu/+source/linux-hwe-5.11/5.11.0-41.45~20.04.1
https://launchpad.net/ubuntu/+source/linux-oracle-5.11/5.11.0-1022.23~20.04.1

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