CWE
416
Advisory Published

USN-3931-1: Linux kernel vulnerabilities

First published: Tue Apr 02 2019(Updated: )

M. Vefa Bicakci and Andy Lutomirski discovered that the kernel did not properly set up all arguments to an error handler callback used when running as a paravirtualized guest. An unprivileged attacker in a paravirtualized guest VM could use this to cause a denial of service (guest VM crash). (CVE-2018-14678) It was discovered that the KVM implementation in the Linux kernel on ARM 64bit processors did not properly handle some ioctls. An attacker with the privilege to create KVM-based virtual machines could use this to cause a denial of service (host system crash) or execute arbitrary code in the host. (CVE-2018-18021) Mathias Payer and Hui Peng discovered a use-after-free vulnerability in the Advanced Linux Sound Architecture (ALSA) subsystem. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2018-19824) Shlomi Oberman, Yuli Shapiro, and Ran Menscher discovered an information leak in the Bluetooth implementation of the Linux kernel. An attacker within Bluetooth range could use this to expose sensitive information (kernel memory). (CVE-2019-3459, CVE-2019-3460) Jann Horn discovered that the KVM implementation in the Linux kernel contained a use-after-free vulnerability. An attacker in a guest VM with access to /dev/kvm could use this to cause a denial of service (guest VM crash). (CVE-2019-6974) Jim Mattson and Felix Wilhelm discovered a use-after-free vulnerability in the KVM subsystem of the Linux kernel, when using nested virtual machines. A local attacker in a guest VM could use this to cause a denial of service (system crash) or possibly execute arbitrary code in the host system. (CVE-2019-7221) Felix Wilhelm discovered that an information leak vulnerability existed in the KVM subsystem of the Linux kernel, when nested virtualization is used. A local attacker could use this to expose sensitive information (host system memory to a guest VM). (CVE-2019-7222) Jann Horn discovered that the eBPF implementation in the Linux kernel was insufficiently hardened against Spectre V1 attacks. A local attacker could use this to expose sensitive information. (CVE-2019-7308) It was discovered that a use-after-free vulnerability existed in the user- space API for crypto (af_alg) implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-8912) It was discovered that the Linux kernel did not properly deallocate memory when handling certain errors while reading files. A local attacker could use this to cause a denial of service (excessive memory consumption). (CVE-2019-8980) Jann Horn discovered that the mmap implementation in the Linux kernel did not properly check for the mmap minimum address in some situations. A local attacker could use this to assist exploiting a kernel NULL pointer dereference vulnerability. (CVE-2019-9213)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-4.15.0-1010-oracle<4.15.0-1010.12
4.15.0-1010.12
=18.04
All of
ubuntu/linux-image-4.15.0-1029-gcp<4.15.0-1029.31
4.15.0-1029.31
=18.04
All of
ubuntu/linux-image-4.15.0-1031-kvm<4.15.0-1031.31
4.15.0-1031.31
=18.04
All of
ubuntu/linux-image-4.15.0-1033-raspi2<4.15.0-1033.35
4.15.0-1033.35
=18.04
All of
ubuntu/linux-image-4.15.0-1035-aws<4.15.0-1035.37
4.15.0-1035.37
=18.04
All of
ubuntu/linux-image-4.15.0-1035-oem<4.15.0-1035.40
4.15.0-1035.40
=18.04
All of
ubuntu/linux-image-4.15.0-47-generic<4.15.0-47.50
4.15.0-47.50
=18.04
All of
ubuntu/linux-image-4.15.0-47-generic-lpae<4.15.0-47.50
4.15.0-47.50
=18.04
All of
ubuntu/linux-image-4.15.0-47-lowlatency<4.15.0-47.50
4.15.0-47.50
=18.04
All of
ubuntu/linux-image-4.15.0-47-snapdragon<4.15.0-47.50
4.15.0-47.50
=18.04
All of
ubuntu/linux-image-aws<4.15.0.1035.34
4.15.0.1035.34
=18.04
All of
ubuntu/linux-image-gcp<4.15.0.1029.31
4.15.0.1029.31
=18.04
All of
ubuntu/linux-image-generic<4.15.0.47.49
4.15.0.47.49
=18.04
All of
ubuntu/linux-image-generic-lpae<4.15.0.47.49
4.15.0.47.49
=18.04
All of
ubuntu/linux-image-gke<4.15.0.1029.31
4.15.0.1029.31
=18.04
All of
ubuntu/linux-image-kvm<4.15.0.1031.31
4.15.0.1031.31
=18.04
All of
ubuntu/linux-image-lowlatency<4.15.0.47.49
4.15.0.47.49
=18.04
All of
ubuntu/linux-image-oem<4.15.0.1035.40
4.15.0.1035.40
=18.04
All of
ubuntu/linux-image-oracle<4.15.0.1010.13
4.15.0.1010.13
=18.04
All of
ubuntu/linux-image-raspi2<4.15.0.1033.31
4.15.0.1033.31
=18.04
All of
ubuntu/linux-image-snapdragon<4.15.0.47.49
4.15.0.47.49
=18.04
All of
ubuntu/linux-image-virtual<4.15.0.47.49
4.15.0.47.49
=18.04

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of USN-3931-1?

    The severity of USN-3931-1 is high.

  • How does the vulnerability in USN-3931-1 impact the Linux kernel?

    This vulnerability in USN-3931-1 can cause a denial of service (guest VM crash) if exploited by an unprivileged attacker in a paravirtualized guest VM.

  • Which versions of Ubuntu are affected by USN-3931-1?

    Ubuntu 18.04 is affected by USN-3931-1.

  • How do I fix the vulnerability in USN-3931-1?

    To fix the vulnerability in USN-3931-1, update your Linux kernel to version 4.15.0-1010.12 or later.

  • Where can I find more information about USN-3931-1?

    More information about USN-3931-1 can be found at the Ubuntu Security Tracker.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2024 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203