what you don't know can hurt you

Ubuntu Security Notice USN-4411-1

Ubuntu Security Notice USN-4411-1
Posted Jul 3, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4411-1 - It was discovered that the elf handling code in the Linux kernel did not initialize memory before using it in certain situations. A local attacker could use this to possibly expose sensitive information. Matthew Sheets discovered that the SELinux network label handling implementation in the Linux kernel could be coerced into de-referencing a NULL pointer. A remote attacker could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, remote, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2020-10711, CVE-2020-10732, CVE-2020-12768, CVE-2020-12770, CVE-2020-13143
MD5 | 148b0d020976d401ff4a67db24197a2b

Ubuntu Security Notice USN-4411-1

Change Mirror Download
=========================================================================
Ubuntu Security Notice USN-4411-1
July 02, 2020

linux, linux-aws, linux-gcp, linux-kvm, linux-oracle, linux-riscv
vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- 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-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-riscv: Linux kernel for RISC-V systems

Details:

It was discovered that the elf handling code in the Linux kernel did not
initialize memory before using it in certain situations. A local attacker
could use this to possibly expose sensitive information (kernel memory).
(CVE-2020-10732)

Matthew Sheets discovered that the SELinux network label handling
implementation in the Linux kernel could be coerced into de-referencing a
NULL pointer. A remote attacker could use this to cause a denial of service
(system crash). (CVE-2020-10711)

It was discovered that the SCSI generic (sg) driver in the Linux kernel did
not properly handle certain error conditions correctly. A local privileged
attacker could use this to cause a denial of service (system crash).
(CVE-2020-12770)

It was discovered that the USB Gadget device driver in the Linux kernel did
not validate arguments passed from configfs in some situations. A local
attacker could possibly use this to cause a denial of service (system
crash) or possibly expose sensitive information. (CVE-2020-13143)

It was discovered that the KVM implementation in the Linux kernel did not
properly deallocate memory on initialization for some processors. A local
attacker could possibly use this to cause a denial of service.
(CVE-2020-12768)

Update instructions:

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

Ubuntu 20.04 LTS:
linux-image-5.4.0-1018-aws 5.4.0-1018.18
linux-image-5.4.0-1019-gcp 5.4.0-1019.19
linux-image-5.4.0-1019-oracle 5.4.0-1019.19
linux-image-5.4.0-28-generic 5.4.0-28.32
linux-image-5.4.0-40-generic 5.4.0-40.44
linux-image-5.4.0-40-generic-lpae 5.4.0-40.44
linux-image-5.4.0-40-lowlatency 5.4.0-40.44
linux-image-aws 5.4.0.1018.19
linux-image-gcp 5.4.0.1019.17
linux-image-generic 5.4.0.28.35
linux-image-generic-lpae 5.4.0.40.43
linux-image-gke 5.4.0.1019.17
linux-image-kvm 5.4.0.1018.17
linux-image-lowlatency 5.4.0.40.43
linux-image-oem 5.4.0.40.43
linux-image-oem-osp1 5.4.0.40.43
linux-image-oracle 5.4.0.1019.17
linux-image-virtual 5.4.0.28.35

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/4411-1
CVE-2020-10711, CVE-2020-10732, CVE-2020-12768, CVE-2020-12770,
CVE-2020-13143

Package Information:
https://launchpad.net/ubuntu/+source/linux/5.4.0-40.44
https://launchpad.net/ubuntu/+source/linux-aws/5.4.0-1018.18
https://launchpad.net/ubuntu/+source/linux-gcp/5.4.0-1019.19
https://launchpad.net/ubuntu/+source/linux-kvm/5.4.0-1018.18
https://launchpad.net/ubuntu/+source/linux-oracle/5.4.0-1019.19
https://launchpad.net/ubuntu/+source/linux-riscv/5.4.0-28.32
Login or Register to add favorites

File Archive:

August 2020

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Aug 1st
    3 Files
  • 2
    Aug 2nd
    2 Files
  • 3
    Aug 3rd
    32 Files
  • 4
    Aug 4th
    22 Files
  • 5
    Aug 5th
    15 Files
  • 6
    Aug 6th
    19 Files
  • 7
    Aug 7th
    6 Files
  • 8
    Aug 8th
    1 Files
  • 9
    Aug 9th
    2 Files
  • 10
    Aug 10th
    27 Files
  • 11
    Aug 11th
    0 Files
  • 12
    Aug 12th
    0 Files
  • 13
    Aug 13th
    0 Files
  • 14
    Aug 14th
    0 Files
  • 15
    Aug 15th
    0 Files
  • 16
    Aug 16th
    0 Files
  • 17
    Aug 17th
    0 Files
  • 18
    Aug 18th
    0 Files
  • 19
    Aug 19th
    0 Files
  • 20
    Aug 20th
    0 Files
  • 21
    Aug 21st
    0 Files
  • 22
    Aug 22nd
    0 Files
  • 23
    Aug 23rd
    0 Files
  • 24
    Aug 24th
    0 Files
  • 25
    Aug 25th
    0 Files
  • 26
    Aug 26th
    0 Files
  • 27
    Aug 27th
    0 Files
  • 28
    Aug 28th
    0 Files
  • 29
    Aug 29th
    0 Files
  • 30
    Aug 30th
    0 Files
  • 31
    Aug 31st
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2020 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close