Incorrect Authorization Affecting kernel-rt-debug-modules-extra package, versions <0:4.18.0-80.11.1.rt9.156.el8_0
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Test your applications- Snyk ID SNYK-CENTOS8-KERNELRTDEBUGMODULESEXTRA-1992552
- published 26 Jul 2021
- disclosed 5 Apr 2019
Introduced: 5 Apr 2019
CVE-2019-3887 Open this link in a new tabHow to fix?
Upgrade Centos:8 kernel-rt-debug-modules-extra to version 0:4.18.0-80.11.1.rt9.156.el8_0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-rt-debug-modules-extra package and not the kernel-rt-debug-modules-extra package as distributed by Centos.
See How to fix? for Centos:8 relevant fixed versions and status.
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. Kernel versions from 4.16 and newer are vulnerable to this issue.
References
- http://www.securityfocus.com/bid/107850
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3887
- https://access.redhat.com/security/cve/CVE-2019-3887
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IWPOIII2L73HV5PGXSGMRMKQIK47UIYE/
- https://access.redhat.com/errata/RHSA-2019:2741
- https://usn.ubuntu.com/3979-1/
- https://usn.ubuntu.com/3980-1/
- https://usn.ubuntu.com/3980-2/
- https://bugzilla.redhat.com/show_bug.cgi?id=1695044
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IWPOIII2L73HV5PGXSGMRMKQIK47UIYE/