CVE-2012-3494

Gentoo Linux Security Advisory 201309-24

Severity Score

6.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The set_debugreg hypercall in include/asm-x86/debugreg.h in Xen 4.0, 4.1, and 4.2, and Citrix XenServer 6.0.2 and earlier, when running on x86-64 systems, allows local OS guest users to cause a denial of service (host crash) by writing to the reserved bits of the DR7 debug control register.

La hiperllamada et_debugreg en include/asm-x86/debugreg.h en Xen v4.0, v4.1, y v4.2, y Citrix XenServer v6.0.2 y anteriores, cuando se ejecuta sobre systemas x86-64, permite a usuarios locales del SO invitado generar una denegación de servicio (caída del host) mediante la escritura de ciertos bits reservados para el registro de control DR

Multiple vulnerabilities have been found in Xen, allowing attackers on a Xen Virtual Machine to execute arbitrary code, cause Denial of Service, or gain access to data on the host. Versions less than 4.2.2-r1 are affected.

*Credits: N/A

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

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2012-06-14 CVE Reserved
2012-09-10 CVE Published
2024-08-06 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-264: Permissions, Privileges, and Access Controls

CAPEC

References (25)

URL	Tag	Source
http://lists.xen.org/archives/html/xen-announce/2012-09/msg00000.html	Mailing List
http://osvdb.org/85197	Vdb Entry
http://secunia.com/advisories/51413	Third Party Advisory
http://secunia.com/advisories/55082	Third Party Advisory
http://wiki.xen.org/wiki/Security_Announcements#XSA-12_hypercall_set_debugreg_vulnerability	X_refsource_misc
http://www.openwall.com/lists/oss-security/2012/09/05/5	Mailing List
http://www.securityfocus.com/bid/55400	Vdb Entry
http://www.securitytracker.com/id?1027479	Vdb Entry
https://bugzilla.redhat.com/show_bug.cgi?id=851139	X_refsource_misc
https://exchange.xforce.ibmcloud.com/vulnerabilities/78265	Vdb Entry

URL	Date	SRC

URL	Date	SRC
http://support.citrix.com/article/CTX134708	2017-08-29

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00001.html	2017-08-29
http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00003.html	2017-08-29
http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00004.html	2017-08-29
http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00005.html	2017-08-29
http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00012.html	2017-08-29
http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00017.html	2017-08-29
http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00018.html	2017-08-29
http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00017.html	2017-08-29
http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00018.html	2017-08-29
http://secunia.com/advisories/50472	2017-08-29
http://secunia.com/advisories/50530	2017-08-29
http://security.gentoo.org/glsa/glsa-201309-24.xml	2017-08-29
http://www.debian.org/security/2012/dsa-2544	2017-08-29
https://security.gentoo.org/glsa/201604-03	2017-08-29

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Citrix Search vendor "Citrix"		Xenserver Search vendor "Citrix" for product "Xenserver"				<= 6.0.2 Search vendor "Citrix" for product "Xenserver" and version " <= 6.0.2"		x64		Affected
Citrix Search vendor "Citrix"		Xenserver Search vendor "Citrix" for product "Xenserver"				<= 6.0.2 Search vendor "Citrix" for product "Xenserver" and version " <= 6.0.2"		x86		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				4.0.0 Search vendor "Xen" for product "Xen" and version "4.0.0"		x64		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				4.0.0 Search vendor "Xen" for product "Xen" and version "4.0.0"		x86		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				4.1.0 Search vendor "Xen" for product "Xen" and version "4.1.0"		x64		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				4.1.0 Search vendor "Xen" for product "Xen" and version "4.1.0"		x86		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				4.2.0 Search vendor "Xen" for product "Xen" and version "4.2.0"		x64		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				4.2.0 Search vendor "Xen" for product "Xen" and version "4.2.0"		x86		Affected