CWE
863
Advisory Published
CVE Published
CVE Published
Updated

CVE-2019-3887

First published: Tue Apr 02 2019(Updated: )

A flaw was found in the way KVM hypervisor handled x2APIC Machine Specific Rregister(MSR) access with nested(=1) virtualization enabled. In that, L1 guest could access L0's APIC register values via L2 guest, when 'virtualize x2APIC mode' is enabled. A guest could use this flaw to potentially crash the host kernel resulting in DoS issue. Upstream patches: ----------------- -&gt; <a href="https://git.kernel.org/pub/scm/virt/kvm/kvm.git/commit/?id=acff78477b9b4f26ecdf65733a4ed77fe837e9dc">https://git.kernel.org/pub/scm/virt/kvm/kvm.git/commit/?id=acff78477b9b4f26ecdf65733a4ed77fe837e9dc</a> -&gt; <a href="https://git.kernel.org/pub/scm/virt/kvm/kvm.git/commit/?id=c73f4c998e1fd4249b9edfa39e23f4fda2b9b041">https://git.kernel.org/pub/scm/virt/kvm/kvm.git/commit/?id=c73f4c998e1fd4249b9edfa39e23f4fda2b9b041</a> Reference: ---------- -&gt; <a href="https://www.openwall.com/lists/oss-security/2019/04/08/1">https://www.openwall.com/lists/oss-security/2019/04/08/1</a>

Credit: secalert@redhat.com secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
redhat/kernel-rt<0:4.18.0-80.11.1.rt9.156.el8_0
0:4.18.0-80.11.1.rt9.156.el8_0
redhat/kernel<0:4.18.0-80.11.1.el8_0
0:4.18.0-80.11.1.el8_0
Linux Linux kernel>=4.16
Fedoraproject Fedora=29
Canonical Ubuntu Linux=18.04
Canonical Ubuntu Linux=18.10
Canonical Ubuntu Linux=19.04
Redhat Enterprise Linux=8.0
Redhat Enterprise Linux Eus=8.1
Redhat Enterprise Linux Eus=8.2
Redhat Enterprise Linux Eus=8.4
Redhat Enterprise Linux For Real Time=8
Redhat Enterprise Linux For Real Time For Nfv=8
Redhat Enterprise Linux For Real Time For Nfv Tus=8.2
Redhat Enterprise Linux For Real Time For Nfv Tus=8.4
Redhat Enterprise Linux For Real Time Tus=8.2
Redhat Enterprise Linux For Real Time Tus=8.4
Redhat Enterprise Linux Server Aus=8.2
Redhat Enterprise Linux Server Aus=8.4
Redhat Enterprise Linux Server Tus=8.2
Redhat Enterprise Linux Server Tus=8.4
debian/linux
5.10.223-1
5.10.226-1
6.1.115-1
6.1.112-1
6.11.7-1
6.11.9-1

Remedy

If qemu is installed, to prevent nested virtualization from being enabled, set "options kvm_intel nested=0" in /etc/modprobe.d/qemu-system-x86.conf

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.

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2019-3887?

    CVE-2019-3887 is a vulnerability in the KVM hypervisor that allows an L1 guest to access the APIC register values of an L0 guest via an L2 guest, when 'virtualize x2APIC mode' is enabled.

  • What is the severity of CVE-2019-3887?

    CVE-2019-3887 has a severity score of 6.7, which is classified as high.

  • What software is affected by CVE-2019-3887?

    The affected software includes linux-aws, linux-azure, linux-gcp, linux-hwe, linux-kvm, and more.

  • How can I fix CVE-2019-3887?

    To fix CVE-2019-3887, it is recommended to update the affected software to the specified versions that include the necessary patches.

  • Where can I find more information about CVE-2019-3887?

    You can find more information about CVE-2019-3887 in the provided references.

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