Incorrect Authorization Affecting perf package, versions <0:4.18.0-80.11.1.el8_0
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Test your applications- Snyk ID SNYK-RHEL8-PERF-3462659
- 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 RHEL:8 perf to version 0:4.18.0-80.11.1.el8_0 or higher.
This issue was patched in RHSA-2019:2703.
NVD Description
Note: Versions mentioned in the description apply only to the upstream perf package and not the perf package as distributed by RHEL.
See How to fix? for RHEL: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-2019:2703
- 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/