Vulnerability Monitor

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CVE-2019-3887

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.

Published

2019-04-09T16:29:01.990

Last Modified

2024-11-21T04:42:48.077

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 5.6 (MEDIUM)

CVSSv2 Vector

AV:L/AC:M/Au:N/C:N/I:N/A:C

Access Vector: LOCAL
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: COMPLETE

Exploitability Score

3.4

Impact Score

6.9

Weaknesses

Type: Secondary
CWE-863
Type: Secondary
CWE-863

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	linux	linux_kernel	≥ 4.16	Yes
Operating System	fedoraproject	fedora	29	Yes
Operating System	canonical	ubuntu_linux	18.04	Yes
Operating System	canonical	ubuntu_linux	18.10	Yes
Operating System	canonical	ubuntu_linux	19.04	Yes
Operating System	redhat	enterprise_linux	8.0	Yes
Operating System	redhat	enterprise_linux_eus	8.1	Yes
Operating System	redhat	enterprise_linux_eus	8.2	Yes
Operating System	redhat	enterprise_linux_eus	8.4	Yes
Operating System	redhat	enterprise_linux_for_real_time	8	Yes
Operating System	redhat	enterprise_linux_for_real_time_for_nfv	8	Yes
Operating System	redhat	enterprise_linux_for_real_time_for_nfv_tus	8.2	Yes
Operating System	redhat	enterprise_linux_for_real_time_for_nfv_tus	8.4	Yes
Operating System	redhat	enterprise_linux_for_real_time_tus	8.2	Yes
Operating System	redhat	enterprise_linux_for_real_time_tus	8.4	Yes
Operating System	redhat	enterprise_linux_server_aus	8.2	Yes
Operating System	redhat	enterprise_linux_server_aus	8.4	Yes
Operating System	redhat	enterprise_linux_server_tus	8.2	Yes
Operating System	redhat	enterprise_linux_server_tus	8.4	Yes

References

http://www.securityfocus.com/bid/107850 Third Party Advisory, VDB Entry ([email protected])
https://access.redhat.com/errata/RHSA-2019:2703 Third Party Advisory ([email protected])
https://access.redhat.com/errata/RHSA-2019:2741 Third Party Advisory ([email protected])
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3887 Issue Tracking, Patch, Third Party Advisory ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IWPOIII2L73HV5PGXSGMRMKQIK47UIYE/ ([email protected])
https://usn.ubuntu.com/3979-1/ Third Party Advisory ([email protected])
https://usn.ubuntu.com/3980-1/ Third Party Advisory ([email protected])
https://usn.ubuntu.com/3980-2/ Third Party Advisory ([email protected])
http://www.securityfocus.com/bid/107850 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://access.redhat.com/errata/RHSA-2019:2703 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://access.redhat.com/errata/RHSA-2019:2741 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3887 Issue Tracking, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IWPOIII2L73HV5PGXSGMRMKQIK47UIYE/ (af854a3a-2127-422b-91ae-364da2661108)
https://usn.ubuntu.com/3979-1/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://usn.ubuntu.com/3980-1/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://usn.ubuntu.com/3980-2/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)