exploit the possibilities
Home Files News &[SERVICES_TAB]About Contact Add New

Ubuntu Security Notice USN-4660-2

Ubuntu Security Notice USN-4660-2
Posted Dec 14, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4660-2 - USN-4660-1 fixed vulnerabilities in the Linux kernel. Unfortunately, that update introduced a regression in the software raid10 driver when used with fstrim that could lead to data corruption. This update fixes the problem. It was discovered that a race condition existed in the perf subsystem of the Linux kernel, leading to a use-after-free vulnerability. An attacker with access to the perf subsystem could use this to cause a denial of service or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, vulnerability
systems | linux, ubuntu
advisories | CVE-2020-14351, CVE-2020-14390, CVE-2020-25211, CVE-2020-25284, CVE-2020-25285, CVE-2020-25641, CVE-2020-25643, CVE-2020-25645, CVE-2020-28915, CVE-2020-4788
SHA-256 | b683340da7eef1e285118a4d437c5ecf07c3a00fa703347ee4cb1c9ef5624aa8

Ubuntu Security Notice USN-4660-2

Change Mirror Download
=========================================================================
Ubuntu Security Notice USN-4660-2
December 13, 2020

linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp,
linux-gcp-4.15, linux-gke-4.15, linux-hwe, linux-kvm, linux-oracle,
linux-snapdragon regression
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

USN-4660-1 introduced a regression 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-gke-4.15: Linux kernel for Google Container Engine (GKE) 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:

USN-4660-1 fixed vulnerabilities in the Linux kernel. Unfortunately,
that update introduced a regression in the software raid10 driver
when used with fstrim that could lead to data corruption. This update
fixes the problem.

Original advisory details:

It was discovered that a race condition existed in the perf subsystem of
the Linux kernel, leading to a use-after-free vulnerability. An attacker
with access to the perf subsystem could use this to cause a denial of
service (system crash) or possibly execute arbitrary code. (CVE-2020-14351)

It was discovered that the frame buffer implementation in the Linux kernel
did not properly handle some edge cases in software scrollback. A local
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2020-14390)

It was discovered that the netfilter connection tracker for netlink in the
Linux kernel did not properly perform bounds checking in some situations. A
local attacker could use this to cause a denial of service (system crash).
(CVE-2020-25211)

It was discovered that the Rados block device (rbd) driver in the Linux
kernel did not properly perform privilege checks for access to rbd devices
in some situations. A local attacker could use this to map or unmap rbd
block devices. (CVE-2020-25284)

It was discovered that a race condition existed in the hugetlb sysctl
implementation in the Linux kernel. A privileged attacker could use this to
cause a denial of service (system crash). (CVE-2020-25285)

It was discovered that the block layer subsystem in the Linux kernel did
not properly handle zero-length requests. A local attacker could use this
to cause a denial of service. (CVE-2020-25641)

It was discovered that the HDLC PPP implementation in the Linux kernel did
not properly validate input in some situations. A local attacker could use
this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2020-25643)

It was discovered that the GENEVE tunnel implementation in the Linux kernel
when combined with IPSec did not properly select IP routes in some
situations. An attacker could use this to expose sensitive information
(unencrypted network traffic). (CVE-2020-25645)

It was discovered that the framebuffer implementation in the Linux kernel
did not properly perform range checks in certain situations. A local
attacker could use this to expose sensitive information (kernel memory).
(CVE-2020-28915)

It was discovered that Power 9 processors could be coerced to expose
information from the L1 cache in certain situations. A local attacker could
use this to expose sensitive information. (CVE-2020-4788)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 18.04 LTS:
linux-image-4.15.0-1061-oracle 4.15.0-1061.67
linux-image-4.15.0-1076-gke 4.15.0-1076.81
linux-image-4.15.0-1081-kvm 4.15.0-1081.83
linux-image-4.15.0-1090-aws 4.15.0-1090.95
linux-image-4.15.0-1090-gcp 4.15.0-1090.103
linux-image-4.15.0-1093-snapdragon 4.15.0-1093.102
linux-image-4.15.0-1102-azure 4.15.0-1102.113
linux-image-4.15.0-128-generic 4.15.0-128.131
linux-image-4.15.0-128-generic-lpae 4.15.0-128.131
linux-image-4.15.0-128-lowlatency 4.15.0-128.131
linux-image-aws-lts-18.04 4.15.0.1090.92
linux-image-azure-lts-18.04 4.15.0.1102.75
linux-image-gcp-lts-18.04 4.15.0.1090.108
linux-image-generic 4.15.0.128.115
linux-image-generic-lpae 4.15.0.128.115
linux-image-gke 4.15.0.1076.80
linux-image-gke-4.15 4.15.0.1076.80
linux-image-kvm 4.15.0.1081.77
linux-image-lowlatency 4.15.0.128.115
linux-image-oracle-lts-18.04 4.15.0.1061.71
linux-image-powerpc-e500mc 4.15.0.128.115
linux-image-powerpc-smp 4.15.0.128.115
linux-image-powerpc64-emb 4.15.0.128.115
linux-image-powerpc64-smp 4.15.0.128.115
linux-image-snapdragon 4.15.0.1093.96
linux-image-virtual 4.15.0.128.115

Ubuntu 16.04 LTS:
linux-image-4.15.0-1061-oracle 4.15.0-1061.67~16.04.1
linux-image-4.15.0-1090-aws 4.15.0-1090.95~16.04.1
linux-image-4.15.0-1090-gcp 4.15.0-1090.103~16.04.1
linux-image-4.15.0-1102-azure 4.15.0-1102.113~16.04.1
linux-image-4.15.0-128-generic 4.15.0-128.131~16.04.1
linux-image-4.15.0-128-generic-lpae 4.15.0-128.131~16.04.1
linux-image-4.15.0-128-lowlatency 4.15.0-128.131~16.04.1
linux-image-aws-hwe 4.15.0.1090.84
linux-image-azure 4.15.0.1102.95
linux-image-gcp 4.15.0.1090.91
linux-image-generic-hwe-16.04 4.15.0.128.127
linux-image-generic-lpae-hwe-16.04 4.15.0.128.127
linux-image-gke 4.15.0.1090.91
linux-image-lowlatency-hwe-16.04 4.15.0.128.127
linux-image-oem 4.15.0.128.127
linux-image-oracle 4.15.0.1061.50
linux-image-virtual-hwe-16.04 4.15.0.128.127

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://usn.ubuntu.com/4660-2
https://usn.ubuntu.com/4660-1
https://launchpad.net/bugs/1907262

Package Information:
https://launchpad.net/ubuntu/+source/linux/4.15.0-128.131
https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1090.95
https://launchpad.net/ubuntu/+source/linux-azure-4.15/4.15.0-1102.113
https://launchpad.net/ubuntu/+source/linux-gcp-4.15/4.15.0-1090.103
https://launchpad.net/ubuntu/+source/linux-gke-4.15/4.15.0-1076.81
https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1081.83
https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1061.67
https://launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1093.102
https://launchpad.net/ubuntu/+source/linux-aws-hwe/4.15.0-1090.95~16.04.1
https://launchpad.net/ubuntu/+source/linux-azure/4.15.0-1102.113~16.04.1
https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1090.103~16.04.1
https://launchpad.net/ubuntu/+source/linux-hwe/4.15.0-128.131~16.04.1
https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1061.67~16.04.1
Login or Register to add favorites

File Archive:

June 2022

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Jun 1st
    19 Files
  • 2
    Jun 2nd
    16 Files
  • 3
    Jun 3rd
    28 Files
  • 4
    Jun 4th
    0 Files
  • 5
    Jun 5th
    0 Files
  • 6
    Jun 6th
    19 Files
  • 7
    Jun 7th
    23 Files
  • 8
    Jun 8th
    11 Files
  • 9
    Jun 9th
    10 Files
  • 10
    Jun 10th
    4 Files
  • 11
    Jun 11th
    0 Files
  • 12
    Jun 12th
    0 Files
  • 13
    Jun 13th
    0 Files
  • 14
    Jun 14th
    0 Files
  • 15
    Jun 15th
    0 Files
  • 16
    Jun 16th
    0 Files
  • 17
    Jun 17th
    0 Files
  • 18
    Jun 18th
    0 Files
  • 19
    Jun 19th
    27 Files
  • 20
    Jun 20th
    65 Files
  • 21
    Jun 21st
    10 Files
  • 22
    Jun 22nd
    8 Files
  • 23
    Jun 23rd
    6 Files
  • 24
    Jun 24th
    6 Files
  • 25
    Jun 25th
    0 Files
  • 26
    Jun 26th
    0 Files
  • 27
    Jun 27th
    15 Files
  • 28
    Jun 28th
    14 Files
  • 29
    Jun 29th
    11 Files
  • 30
    Jun 30th
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2022 Packet Storm. All rights reserved.

Hosting By
Rokasec
close