CVE-2012-5513

kernel: xen: XENMEM_exchange may overwrite hypervisor memory

Severity Score

7.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The XENMEM_exchange handler in Xen 4.2 and earlier does not properly check the memory address, which allows local PV guest OS administrators to cause a denial of service (crash) or possibly gain privileges via unspecified vectors that overwrite memory in the hypervisor reserved range.

El manejador XENMEM_exchange en Xen v4.2 y anteriores no comprueba correctamente la dirección de memoria, lo que permite causar una denegación de servicio (caída del S.O.) a administrador de sistemas operativos invitados PV o posiblemente obtener privilegios a través de vectores no especificados que sobrescriben memoria en rangos del hipervisor reservados.

These packages contain the Linux kernel. A race condition in the way asynchronous I/O and fallocate() interacted when using ext4 could allow a local, unprivileged user to obtain random data from a deleted file. A flaw in the way the Xen hypervisor implementation range checked guest provided addresses in the XENMEM_exchange hypercall could allow a malicious, para-virtualized guest administrator to crash the hypervisor or, potentially, escalate their privileges, allowing them to execute arbitrary code at the hypervisor level.

*Credits: N/A

CVSS Scores

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

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

Attack Vector

Adjacent

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

2012-10-24 CVE Reserved
2012-12-04 CVE Published
2024-08-06 CVE Updated
2025-03-18 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation
CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer

CAPEC

References (25)

URL	Tag	Source
http://secunia.com/advisories/55082	Third Party Advisory
http://support.citrix.com/article/CTX135777	X_refsource_confirm
http://www.openwall.com/lists/oss-security/2012/12/03/11	Mailing List
http://www.osvdb.org/88131	Vdb Entry
http://www.securityfocus.com/bid/56797	Vdb Entry
https://exchange.xforce.ibmcloud.com/vulnerabilities/80482	Vdb Entry

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2012-12/msg00000.html	2023-02-13
http://lists.opensuse.org/opensuse-security-announce/2012-12/msg00001.html	2023-02-13
http://lists.opensuse.org/opensuse-security-announce/2012-12/msg00018.html	2023-02-13
http://lists.opensuse.org/opensuse-security-announce/2012-12/msg00019.html	2023-02-13
http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00011.html	2023-02-13
http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00021.html	2023-02-13
http://lists.opensuse.org/opensuse-security-announce/2014-04/msg00000.html	2023-02-13
http://lists.opensuse.org/opensuse-updates/2013-04/msg00051.html	2023-02-13
http://lists.opensuse.org/opensuse-updates/2013-04/msg00052.html	2023-02-13
http://rhn.redhat.com/errata/RHSA-2012-1540.html	2023-02-13
http://secunia.com/advisories/51397	2023-02-13
http://secunia.com/advisories/51468	2023-02-13
http://secunia.com/advisories/51486	2023-02-13
http://secunia.com/advisories/51487	2023-02-13
http://secunia.com/advisories/51495	2023-02-13
http://security.gentoo.org/glsa/glsa-201309-24.xml	2023-02-13
http://www.debian.org/security/2012/dsa-2582	2023-02-13
https://access.redhat.com/security/cve/CVE-2012-5513	2012-12-04
https://bugzilla.redhat.com/show_bug.cgi?id=877391	2012-12-04

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
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"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				3.0.2 Search vendor "Xen" for product "Xen" and version "3.0.2"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				3.0.3 Search vendor "Xen" for product "Xen" and version "3.0.3"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				3.0.4 Search vendor "Xen" for product "Xen" and version "3.0.4"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				3.1.3 Search vendor "Xen" for product "Xen" and version "3.1.3"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				3.1.4 Search vendor "Xen" for product "Xen" and version "3.1.4"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				3.2.0 Search vendor "Xen" for product "Xen" and version "3.2.0"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				3.2.1 Search vendor "Xen" for product "Xen" and version "3.2.1"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				3.2.2 Search vendor "Xen" for product "Xen" and version "3.2.2"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				3.2.3 Search vendor "Xen" for product "Xen" and version "3.2.3"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				3.3.0 Search vendor "Xen" for product "Xen" and version "3.3.0"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				3.3.1 Search vendor "Xen" for product "Xen" and version "3.3.1"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				3.3.2 Search vendor "Xen" for product "Xen" and version "3.3.2"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				3.4.0 Search vendor "Xen" for product "Xen" and version "3.4.0"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				3.4.1 Search vendor "Xen" for product "Xen" and version "3.4.1"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				3.4.2 Search vendor "Xen" for product "Xen" and version "3.4.2"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				3.4.3 Search vendor "Xen" for product "Xen" and version "3.4.3"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				3.4.4 Search vendor "Xen" for product "Xen" and version "3.4.4"		-		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"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				4.0.1 Search vendor "Xen" for product "Xen" and version "4.0.1"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				4.0.2 Search vendor "Xen" for product "Xen" and version "4.0.2"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				4.0.3 Search vendor "Xen" for product "Xen" and version "4.0.3"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				4.0.4 Search vendor "Xen" for product "Xen" and version "4.0.4"		-		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"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				4.1.1 Search vendor "Xen" for product "Xen" and version "4.1.1"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				4.1.2 Search vendor "Xen" for product "Xen" and version "4.1.2"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				4.1.3 Search vendor "Xen" for product "Xen" and version "4.1.3"		-		Affected