CVE-2019-3887
Kernel: KVM: nVMX: guest accesses L0 MSR causes potential DoS
Severity Score
5.6
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
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.
Se encontró un error en la forma en que el hipervisor KVM manejaba el acceso a x2APIC Machine Specific Rregister (MSR) con la virtualización anidada (=1) habilitada. En este caso, el invitado L1 podría acceder a los valores de registro APIC de L0 a través del invitado L2, cuando `virtualize x2APIC mode' está habilitado. Un invitado podría utilizar este fallo para bloquear el núcleo del host, lo que provocaría un problema de denegación de servicio. El kernel, versión 4.16 y posteriores son vulnerables a este problema.
A flaw was found in the way KVM hypervisor handled x2APIC Machine Specific Register (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.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2019-01-03 CVE Reserved
- 2019-04-09 CVE Published
- 2024-04-02 EPSS Updated
- 2024-08-04 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-863: Incorrect Authorization
CAPEC
References (10)
| URL | Tag | Source |
|---|---|---|
| http://www.securityfocus.com/bid/107850 | Third Party Advisory |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3887 | 2023-02-12 |
| URL | Date | SRC |
|---|---|---|
| https://access.redhat.com/errata/RHSA-2019:2703 | 2023-02-12 | |
| https://access.redhat.com/errata/RHSA-2019:2741 | 2023-02-12 | |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IWPOIII2L73HV5PGXSGMRMKQIK47UIYE | 2023-02-12 | |
| https://usn.ubuntu.com/3979-1 | 2023-02-12 | |
| https://usn.ubuntu.com/3980-1 | 2023-02-12 | |
| https://usn.ubuntu.com/3980-2 | 2023-02-12 | |
| https://access.redhat.com/security/cve/CVE-2019-3887 | 2019-09-12 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1695044 | 2019-09-12 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.16 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.16" | - |
Affected
| ||||||
| Fedoraproject Search vendor "Fedoraproject" | Fedora Search vendor "Fedoraproject" for product "Fedora" | 29 Search vendor "Fedoraproject" for product "Fedora" and version "29" | - |
Affected
| ||||||
| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 18.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "18.04" | lts |
Affected
| ||||||
| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 18.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "18.10" | - |
Affected
| ||||||
| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 19.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "19.04" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Eus Search vendor "Redhat" for product "Enterprise Linux Eus" | 8.1 Search vendor "Redhat" for product "Enterprise Linux Eus" and version "8.1" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Eus Search vendor "Redhat" for product "Enterprise Linux Eus" | 8.2 Search vendor "Redhat" for product "Enterprise Linux Eus" and version "8.2" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Eus Search vendor "Redhat" for product "Enterprise Linux Eus" | 8.4 Search vendor "Redhat" for product "Enterprise Linux Eus" and version "8.4" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux For Real Time Search vendor "Redhat" for product "Enterprise Linux For Real Time" | 8 Search vendor "Redhat" for product "Enterprise Linux For Real Time" and version "8" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux For Real Time For Nfv Search vendor "Redhat" for product "Enterprise Linux For Real Time For Nfv" | 8 Search vendor "Redhat" for product "Enterprise Linux For Real Time For Nfv" and version "8" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux For Real Time For Nfv Tus Search vendor "Redhat" for product "Enterprise Linux For Real Time For Nfv Tus" | 8.2 Search vendor "Redhat" for product "Enterprise Linux For Real Time For Nfv Tus" and version "8.2" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux For Real Time For Nfv Tus Search vendor "Redhat" for product "Enterprise Linux For Real Time For Nfv Tus" | 8.4 Search vendor "Redhat" for product "Enterprise Linux For Real Time For Nfv Tus" and version "8.4" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux For Real Time Tus Search vendor "Redhat" for product "Enterprise Linux For Real Time Tus" | 8.2 Search vendor "Redhat" for product "Enterprise Linux For Real Time Tus" and version "8.2" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux For Real Time Tus Search vendor "Redhat" for product "Enterprise Linux For Real Time Tus" | 8.4 Search vendor "Redhat" for product "Enterprise Linux For Real Time Tus" and version "8.4" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Server Aus Search vendor "Redhat" for product "Enterprise Linux Server Aus" | 8.2 Search vendor "Redhat" for product "Enterprise Linux Server Aus" and version "8.2" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Server Aus Search vendor "Redhat" for product "Enterprise Linux Server Aus" | 8.4 Search vendor "Redhat" for product "Enterprise Linux Server Aus" and version "8.4" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Server Tus Search vendor "Redhat" for product "Enterprise Linux Server Tus" | 8.2 Search vendor "Redhat" for product "Enterprise Linux Server Tus" and version "8.2" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Server Tus Search vendor "Redhat" for product "Enterprise Linux Server Tus" | 8.4 Search vendor "Redhat" for product "Enterprise Linux Server Tus" and version "8.4" | - |
Affected
| ||||||