USN-4157-1: Linux kernel vulnerabilities

Published Oct 17, 2019
·
Updated

Wen Huang discovered that the Marvell Wi-Fi device driver in the Linux kernel did not properly perform bounds checking, leading to a heap overflow. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-14814, CVE-2019-14815, CVE-2019-14816) Matt Delco discovered that the KVM hypervisor implementation in the Linux kernel did not properly perform bounds checking when handling coalesced MMIO write operations. A local attacker with write access to /dev/kvm could use this to cause a denial of service (system crash). (CVE-2019-14821) Hui Peng and Mathias Payer discovered that the 91x Wi-Fi driver in the Linux kernel did not properly handle error conditions on initialization, leading to a double-free vulnerability. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2019-15504) It was discovered that the Technisat DVB-S/S2 USB device driver in the Linux kernel contained a buffer overread. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2019-15505) Brad Spengler discovered that a Spectre mitigation was improperly implemented in the ptrace susbsystem of the Linux kernel. A local attacker could possibly use this to expose sensitive information. (CVE-2019-15902) It was discovered that the IPv6 RDS implementation in the Linux kernel did not properly initialize fields in a data structure returned to user space. A local attacker could use this to expose sensitive information (kernel memory). Please note that the RDS protocol is disabled via blocklist in Ubuntu by default. (CVE-2019-16714) It was discovered that an integer overflow existed in the Binder implementation of the Linux kernel, leading to a buffer overflow. A local attacker could use this to escalate privileges. (CVE-2019-2181)

Affected Software

41 affected componentsFixes available
Canonical Linux kernel
All of the following
ubuntu/linux-image-5.0.0-1019-aws<5.0.0-1019.21
5.0.0-1019.21
Ubuntu Ubuntu=19.04
All of the following
ubuntu/linux-image-5.0.0-1020-kvm<5.0.0-1020.21
5.0.0-1020.21
Ubuntu Ubuntu=19.04
All of the following
ubuntu/linux-image-5.0.0-1020-raspi2<5.0.0-1020.20
5.0.0-1020.20
Ubuntu Ubuntu=19.04
All of the following
ubuntu/linux-image-5.0.0-1021-gcp<5.0.0-1021.21
5.0.0-1021.21
Ubuntu Ubuntu=19.04
All of the following
ubuntu/linux-image-5.0.0-1023-azure<5.0.0-1023.24
5.0.0-1023.24
Ubuntu Ubuntu=19.04
All of the following
ubuntu/linux-image-5.0.0-1024-snapdragon<5.0.0-1024.25
5.0.0-1024.25
Ubuntu Ubuntu=19.04
All of the following
ubuntu/linux-image-5.0.0-32-generic<5.0.0-32.34
5.0.0-32.34
Ubuntu Ubuntu=19.04
All of the following
ubuntu/linux-image-5.0.0-32-generic-lpae<5.0.0-32.34
5.0.0-32.34
Ubuntu Ubuntu=19.04
All of the following
ubuntu/linux-image-5.0.0-32-lowlatency<5.0.0-32.34
5.0.0-32.34
Ubuntu Ubuntu=19.04
All of the following
ubuntu/linux-image-aws<5.0.0.1019.20
5.0.0.1019.20
Ubuntu Ubuntu=19.04
All of the following
ubuntu/linux-image-azure<5.0.0.1023.22
5.0.0.1023.22
Ubuntu Ubuntu=19.04
All of the following
ubuntu/linux-image-gcp<5.0.0.1021.47
5.0.0.1021.47
Ubuntu Ubuntu=19.04
All of the following
ubuntu/linux-image-generic<5.0.0.32.33
5.0.0.32.33
Ubuntu Ubuntu=19.04
All of the following
ubuntu/linux-image-generic-lpae<5.0.0.32.33
5.0.0.32.33
Ubuntu Ubuntu=19.04
All of the following
ubuntu/linux-image-gke<5.0.0.1021.47
5.0.0.1021.47
Ubuntu Ubuntu=19.04
All of the following
ubuntu/linux-image-kvm<5.0.0.1020.20
5.0.0.1020.20
Ubuntu Ubuntu=19.04
All of the following
ubuntu/linux-image-lowlatency<5.0.0.32.33
5.0.0.32.33
Ubuntu Ubuntu=19.04
All of the following
ubuntu/linux-image-raspi2<5.0.0.1020.17
5.0.0.1020.17
Ubuntu Ubuntu=19.04
All of the following
ubuntu/linux-image-snapdragon<5.0.0.1024.17
5.0.0.1024.17
Ubuntu Ubuntu=19.04
All of the following
ubuntu/linux-image-virtual<5.0.0.32.33
5.0.0.32.33
Ubuntu Ubuntu=19.04

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade ubuntu/linux-image-5.0.0-1019-aws to a version that resolves this vulnerability.

    Fixed in 5.0.0-1019.21
  2. Upgrade

    Upgrade ubuntu/linux-image-5.0.0-1020-kvm to a version that resolves this vulnerability.

    Fixed in 5.0.0-1020.21
  3. Upgrade

    Upgrade ubuntu/linux-image-5.0.0-1020-raspi2 to a version that resolves this vulnerability.

    Fixed in 5.0.0-1020.20
  4. Upgrade

    Upgrade ubuntu/linux-image-5.0.0-1021-gcp to a version that resolves this vulnerability.

    Fixed in 5.0.0-1021.21
  5. Upgrade

    Upgrade ubuntu/linux-image-5.0.0-1023-azure to a version that resolves this vulnerability.

    Fixed in 5.0.0-1023.24
  6. Upgrade

    Upgrade ubuntu/linux-image-5.0.0-1024-snapdragon to a version that resolves this vulnerability.

    Fixed in 5.0.0-1024.25
  7. Upgrade

    Upgrade ubuntu/linux-image-5.0.0-32-generic to a version that resolves this vulnerability.

    Fixed in 5.0.0-32.34
  8. Upgrade

    Upgrade ubuntu/linux-image-5.0.0-32-generic-lpae to a version that resolves this vulnerability.

    Fixed in 5.0.0-32.34
  9. Upgrade

    Upgrade ubuntu/linux-image-5.0.0-32-lowlatency to a version that resolves this vulnerability.

    Fixed in 5.0.0-32.34
  10. Upgrade

    Upgrade ubuntu/linux-image-aws to a version that resolves this vulnerability.

    Fixed in 5.0.0.1019.20
  11. Upgrade

    Upgrade ubuntu/linux-image-azure to a version that resolves this vulnerability.

    Fixed in 5.0.0.1023.22
  12. Upgrade

    Upgrade ubuntu/linux-image-gcp to a version that resolves this vulnerability.

    Fixed in 5.0.0.1021.47
  13. Upgrade

    Upgrade ubuntu/linux-image-generic to a version that resolves this vulnerability.

    Fixed in 5.0.0.32.33
  14. Upgrade

    Upgrade ubuntu/linux-image-generic-lpae to a version that resolves this vulnerability.

    Fixed in 5.0.0.32.33
  15. Upgrade

    Upgrade ubuntu/linux-image-gke to a version that resolves this vulnerability.

    Fixed in 5.0.0.1021.47
  16. Upgrade

    Upgrade ubuntu/linux-image-kvm to a version that resolves this vulnerability.

    Fixed in 5.0.0.1020.20
  17. Upgrade

    Upgrade ubuntu/linux-image-lowlatency to a version that resolves this vulnerability.

    Fixed in 5.0.0.32.33
  18. Upgrade

    Upgrade ubuntu/linux-image-raspi2 to a version that resolves this vulnerability.

    Fixed in 5.0.0.1020.17
  19. Upgrade

    Upgrade ubuntu/linux-image-snapdragon to a version that resolves this vulnerability.

    Fixed in 5.0.0.1024.17
  20. Upgrade

    Upgrade ubuntu/linux-image-virtual to a version that resolves this vulnerability.

    Fixed in 5.0.0.32.33
  21. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Patch USN-4157-1

Event History

Oct 17, 2019
Advisory Published
via Ubuntu·12:00 AM
Data Sourced
via Ubuntu·12:00 AM
DescriptionAffected Software

Child vulnerabilities

Contains the following vulnerabilities.

Frequently Asked Questions

1

What is the vulnerability ID for this Linux kernel vulnerability?

The vulnerability ID for this Linux kernel vulnerability is CVE-2019-14814, CVE-2019-14815, CVE-2019-14816.

2

What is the severity of this vulnerability?

The severity of this vulnerability is not specified.

3

Which Linux kernel versions are affected by this vulnerability?

The Linux kernel versions affected by this vulnerability are 5.0.0-1019.21, 5.0.0-1020.21, 5.0.0-1020.20, 5.0.0-1021.21, 5.0.0-1023.24, 5.0.0-1024.25, 5.0.0-32.34, 5.0.0-32.34, 5.0.0-32.34, 5.0.0.1019.20, 5.0.0.1023.22, 5.0.0.1021.47, 5.0.0.32.33, 5.0.0.32.33, 5.0.0.1021.47, 5.0.0.1020.20, 5.0.0.32.33, 5.0.0.1020.17, 5.0.0.1024.17, 5.0.0.32.33.

4

How can a local attacker exploit this vulnerability?

A local attacker can exploit this vulnerability by using it to cause a denial of service (system crash) or possibly execute arbitrary code.

5

Where can I find more information about this vulnerability?

You can find more information about this vulnerability at the following references: [CVE-2019-14814](https://ubuntu.com/security/CVE-2019-14814), [CVE-2019-14815](https://ubuntu.com/security/CVE-2019-14815), [CVE-2019-14816](https://ubuntu.com/security/CVE-2019-14816).

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