CWE
416
Advisory Published

USN-4162-2: Linux kernel (Azure) vulnerabilities

First published: Wed Oct 23 2019(Updated: )

USN-4162-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04 LTS. This update provides the corresponding updates for the Linux kernel for Microsoft Azure Cloud systems for Ubuntu 14.04 ESM. It was discovered that the RSI 91x Wi-Fi driver in the Linux kernel did not did not handle detach operations correctly, leading to a use-after-free vulnerability. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-21008) 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 USB audio driver for the Linux kernel did not properly validate device meta data. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2019-15117) Hui Peng and Mathias Payer discovered that the USB audio driver for the Linux kernel improperly performed recursion while handling device meta data. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2019-15118) 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 SMB networking file system implementation in the Linux kernel contained a buffer overread. An attacker could use this to expose sensitive information (kernel memory). (CVE-2019-15918)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-4.15.0-1061-azure<4.15.0-1061.66~14.04.1
4.15.0-1061.66~14.04.1
=14.04
All of
ubuntu/linux-image-azure<4.15.0.1061.47
4.15.0.1061.47
=14.04

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Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of USN-4162-2?

    The severity of USN-4162-2 is not specified in the information provided.

  • What is the affected software for USN-4162-2?

    The affected software for USN-4162-2 is the Linux kernel for Microsoft Azure Cloud systems for Ubuntu 14.04 ESM.

  • How do I fix USN-4162-2?

    To fix USN-4162-2, update the Linux kernel for Microsoft Azure Cloud systems to version 4.15.0-1061.66~14.04.1.

  • What vulnerabilities are fixed by USN-4162-2?

    USN-4162-2 fixes the following vulnerabilities: CVE-2018-21008, CVE-2019-14814, CVE-2019-14815.

  • Where can I find more information about USN-4162-2?

    More information about USN-4162-2 can be found on the Ubuntu security website: https://ubuntu.com/security/

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