CVE-2012-2121

kvm: device assignment page leak

Severity Score

6.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The KVM implementation in the Linux kernel before 3.3.4 does not properly manage the relationships between memory slots and the iommu, which allows guest OS users to cause a denial of service (memory leak and host OS crash) by leveraging administrative access to the guest OS to conduct hotunplug and hotplug operations on devices.

La implementación de KVM en el kernel de Linux en versiones anteriores a la v3.3.4 no gestiona correctamente la relación entre las ranuras de memoria y el IOMMU, lo que permite causar una denegación de servicio (caída del sistema host) a los usuarios de sistemas operativos virtuales que funcionen bajo esa plataforma , aprovechandose del acceso de administración a un sistema operativo invitado para llevar a cabo operaciones 'hotunplug' y 'hotplug' en los dispositivos.

*Credits: N/A

CVSS Scores

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

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

2012-04-04 CVE Reserved
2012-05-17 CVE Published
2023-03-08 EPSS Updated
2024-08-06 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-264: Permissions, Privileges, and Access Controls

CAPEC

References (12)

URL	Tag	Source
http://secunia.com/advisories/50732	Third Party Advisory
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.3.4	X_refsource_confirm
http://www.openwall.com/lists/oss-security/2012/04/19/16	Mailing List
http://www.securitytracker.com/id?1027083	Vdb Entry
https://github.com/torvalds/linux/commit/09ca8e1173bcb12e2a449698c9ae3b86a8a10195	X_refsource_confirm

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://rhn.redhat.com/errata/RHSA-2012-0676.html	2018-01-05
http://rhn.redhat.com/errata/RHSA-2012-0743.html	2018-01-05
http://www.ubuntu.com/usn/USN-1577-1	2018-01-05
http://www.ubuntu.com/usn/USN-2036-1	2018-01-05
http://www.ubuntu.com/usn/USN-2037-1	2018-01-05
https://bugzilla.redhat.com/show_bug.cgi?id=814149	2012-06-18
https://access.redhat.com/security/cve/CVE-2012-2121	2012-06-18

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"				<= 3.3.3 Search vendor "Linux" for product "Linux Kernel" and version " <= 3.3.3"		-		Affected