// For flags

CVE-2014-3690

kernel: kvm: vmx: invalid host cr4 handling across vm entries

Severity Score

5.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

arch/x86/kvm/vmx.c in the KVM subsystem in the Linux kernel before 3.17.2 on Intel processors does not ensure that the value in the CR4 control register remains the same after a VM entry, which allows host OS users to kill arbitrary processes or cause a denial of service (system disruption) by leveraging /dev/kvm access, as demonstrated by PR_SET_TSC prctl calls within a modified copy of QEMU.

arch/x86/kvm/vmx.c en el subsistema KVM en el kernel de Linux anterior a 3.17.2 en los procesadores Intel no asegura que el valor en el registro de control CR4 queda igual después de una entrada VM, lo que permite a usuarios del sistema operativo anfitrión cancelar varios procesos o causar una denegación de servicio (interrupción del sistema) mediante el aprovechamiento del acceso a /dev/kvm, tal y como fue demostrado por llamadas a prctl PR_SET_TSC dentro de una copia modificada de QEMU.

It was found that the Linux kernel's KVM implementation did not ensure that the host CR4 control register value remained unchanged across VM entries on the same virtual CPU. A local, unprivileged user could use this flaw to cause a denial of service on the system.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Local
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Complete
Attack Vector
Local
Attack Complexity
Medium
Authentication
None
Confidentiality
None
Integrity
None
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2014-05-14 CVE Reserved
  • 2014-10-31 CVE Published
  • 2023-03-08 EPSS Updated
  • 2024-08-06 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-400: Uncontrolled Resource Consumption
CAPEC
References (23)
URL Date SRC
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
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< 3.17.2
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-
Affected
Novell
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Suse Linux Enterprise Desktop
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12.0
Search vendor "Novell" for product "Suse Linux Enterprise Desktop" and version "12.0"
-
Affected
Novell
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Suse Linux Enterprise Server
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11
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sp2, ltss
Affected
Novell
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Suse Linux Enterprise Server
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12.0
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-
Affected
Opensuse
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Evergreen
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11.4
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-
Affected
Suse
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Linux Enterprise Real Time Extension
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11
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sp3
Affected
Suse
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Linux Enterprise Software Development Kit
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12
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-
Affected
Suse
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Linux Enterprise Workstation Extension
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12
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-
Affected
Redhat
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Enterprise Linux
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5.0
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-
Affected
Debian
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Debian Linux
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7.0
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-
Affected
Canonical
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Ubuntu Linux
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12.04
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esm
Affected
Canonical
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Ubuntu Linux
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14.04
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esm
Affected
Canonical
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Ubuntu Linux
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14.10
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-
Affected