CVE-2006-6730

Severity Score

7.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

OpenBSD and NetBSD permit usermode code to kill the display server and write to the X.Org /dev/xf86 device, which allows local users with root privileges to reduce securelevel by replacing the System Management Mode (SMM) handler via a write to an SMRAM address within /dev/xf86 (aka the video card memory-mapped I/O range), and then launching the new handler via a System Management Interrupt (SMI), as demonstrated by a write to Programmed I/O port 0xB2.

OpenBSD y NetBSD permiten al código en modo de usuario matar el servidor de pantalla y escribir en dispositivo X.Org /dev/xf86, lo cual permite a usuarios locales con privilegios de root reducir el nivel de seguridad reemplazando el manejador del Modo de Administración de Sistema (System Management Mode o SMM) mediante una escritura a una dirección SMRAM dentro de /dev/xf86 (esto es el rango de E/S mapeado en memoria para la tarjeta de vídeo), y entonces lanzando el nuevo manejador mediante una Interrupción de Administración de Sistema (System Management Interrupt o SMI), tal y como se ha demostrado con una escritura al puerto de E/S Programada 0xB2.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Medium

Authentication

Single

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2006-12-26 CVE Reserved
2006-12-26 CVE Published
2024-08-07 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (6)

URL	Tag	Source
http://lists.freedesktop.org/archives/xorg/2004-June/000927.html	Mailing List
http://www.cansecwest.com/slides06/csw06-duflot.ppt	X_refsource_misc
http://www.securityfocus.com/archive/1/454379/100/0/threaded	Mailing List
http://www.securityfocus.com/archive/1/454510/100/0/threaded	Mailing List
http://www.securityfocus.com/archive/1/454706/100/0/threaded	Mailing List
http://www.ssi.gouv.fr/fr/sciences/fichiers/lti/cansecwest2006-duflot-paper.pdf	X_refsource_misc

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Netbsd Search vendor "Netbsd"		Netbsd Search vendor "Netbsd" for product "Netbsd"				2.0.4 Search vendor "Netbsd" for product "Netbsd" and version "2.0.4"		-		Affected
Openbsd Search vendor "Openbsd"		Openbsd Search vendor "Openbsd" for product "Openbsd"				*		-		Affected