CVE-2010-4247

xen: request-processing loop is unbounded in blkback

Severity Score

6.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The do_block_io_op function in (1) drivers/xen/blkback/blkback.c and (2) drivers/xen/blktap/blktap.c in Xen before 3.4.0 for the Linux kernel 2.6.18, and possibly other versions, allows guest OS users to cause a denial of service (infinite loop and CPU consumption) via a large production request index to the blkback or blktap back-end drivers. NOTE: some of these details are obtained from third party information.

La función do_block_io_op en (1) ldrivers/xen/blkback/blkback.c and (2) drivers/xen/blktap/blktap.c en Xen anterior a v3.4.0 para el kernel Linux v2.6.18, y posiblemente otras versiones, permite a los usuarios invitados del sistema operativo causar una denegación de servicio (bucle infinito y el consumo de CPU) a través de un gran índice de producción de peticiones a los controladores blkback o blktap back-end. NOTA: algunos de estos detalles han sido obtenidos de información de terceros.

*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

Adjacent

Attack Complexity

Low

Authentication

Single

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2010-11-16 CVE Reserved
2011-01-11 CVE Published
2024-08-07 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation

CAPEC

References (14)

URL	Tag	Source
http://secunia.com/advisories/42789	Third Party Advisory
http://secunia.com/advisories/46397	Third Party Advisory
http://www.securityfocus.com/archive/1/520102/100/0/threaded	Mailing List
http://www.securityfocus.com/bid/45029	Vdb Entry
http://www.vmware.com/security/advisories/VMSA-2011-0012.html	X_refsource_confirm
http://www.vupen.com/english/advisories/2011/0024	Vdb Entry

URL	Date	SRC

URL	Date	SRC
http://www.openwall.com/lists/oss-security/2010/11/23/1	2023-11-07
http://www.openwall.com/lists/oss-security/2010/11/24/8	2023-11-07
http://xenbits.xensource.com/linux-2.6.18-xen.hg?rev/7070d34f251c	2023-11-07
http://xenbits.xensource.com/linux-2.6.18-xen.hg?rev/77f831cbb91d	2023-11-07
https://bugzilla.redhat.com/show_bug.cgi?id=656206	2011-01-04

URL	Date	SRC
http://secunia.com/advisories/35093	2023-11-07
http://www.redhat.com/support/errata/RHSA-2011-0004.html	2023-11-07
https://access.redhat.com/security/cve/CVE-2010-4247	2011-01-04

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Citrix Search vendor "Citrix"	Xen Search vendor "Citrix" for product "Xen"	<= 3.3.2 Search vendor "Citrix" for product "Xen" and version " <= 3.3.2"	-	Affected	in	Linux Search vendor "Linux"	Linux Kernel Search vendor "Linux" for product "Linux Kernel"	2.6.18 Search vendor "Linux" for product "Linux Kernel" and version "2.6.18"	-	Safe
Citrix Search vendor "Citrix"	Xen Search vendor "Citrix" for product "Xen"	3.0.2 Search vendor "Citrix" for product "Xen" and version "3.0.2"	-	Affected	in	Linux Search vendor "Linux"	Linux Kernel Search vendor "Linux" for product "Linux Kernel"	2.6.18 Search vendor "Linux" for product "Linux Kernel" and version "2.6.18"	-	Safe
Citrix Search vendor "Citrix"	Xen Search vendor "Citrix" for product "Xen"	3.0.3 Search vendor "Citrix" for product "Xen" and version "3.0.3"	-	Affected	in	Linux Search vendor "Linux"	Linux Kernel Search vendor "Linux" for product "Linux Kernel"	2.6.18 Search vendor "Linux" for product "Linux Kernel" and version "2.6.18"	-	Safe
Citrix Search vendor "Citrix"	Xen Search vendor "Citrix" for product "Xen"	3.0.4 Search vendor "Citrix" for product "Xen" and version "3.0.4"	-	Affected	in	Linux Search vendor "Linux"	Linux Kernel Search vendor "Linux" for product "Linux Kernel"	2.6.18 Search vendor "Linux" for product "Linux Kernel" and version "2.6.18"	-	Safe
Citrix Search vendor "Citrix"	Xen Search vendor "Citrix" for product "Xen"	3.1.3 Search vendor "Citrix" for product "Xen" and version "3.1.3"	-	Affected	in	Linux Search vendor "Linux"	Linux Kernel Search vendor "Linux" for product "Linux Kernel"	2.6.18 Search vendor "Linux" for product "Linux Kernel" and version "2.6.18"	-	Safe
Citrix Search vendor "Citrix"	Xen Search vendor "Citrix" for product "Xen"	3.1.4 Search vendor "Citrix" for product "Xen" and version "3.1.4"	-	Affected	in	Linux Search vendor "Linux"	Linux Kernel Search vendor "Linux" for product "Linux Kernel"	2.6.18 Search vendor "Linux" for product "Linux Kernel" and version "2.6.18"	-	Safe
Citrix Search vendor "Citrix"	Xen Search vendor "Citrix" for product "Xen"	3.2.0 Search vendor "Citrix" for product "Xen" and version "3.2.0"	-	Affected	in	Linux Search vendor "Linux"	Linux Kernel Search vendor "Linux" for product "Linux Kernel"	2.6.18 Search vendor "Linux" for product "Linux Kernel" and version "2.6.18"	-	Safe
Citrix Search vendor "Citrix"	Xen Search vendor "Citrix" for product "Xen"	3.2.1 Search vendor "Citrix" for product "Xen" and version "3.2.1"	-	Affected	in	Linux Search vendor "Linux"	Linux Kernel Search vendor "Linux" for product "Linux Kernel"	2.6.18 Search vendor "Linux" for product "Linux Kernel" and version "2.6.18"	-	Safe
Citrix Search vendor "Citrix"	Xen Search vendor "Citrix" for product "Xen"	3.2.2 Search vendor "Citrix" for product "Xen" and version "3.2.2"	-	Affected	in	Linux Search vendor "Linux"	Linux Kernel Search vendor "Linux" for product "Linux Kernel"	2.6.18 Search vendor "Linux" for product "Linux Kernel" and version "2.6.18"	-	Safe
Citrix Search vendor "Citrix"	Xen Search vendor "Citrix" for product "Xen"	3.2.3 Search vendor "Citrix" for product "Xen" and version "3.2.3"	-	Affected	in	Linux Search vendor "Linux"	Linux Kernel Search vendor "Linux" for product "Linux Kernel"	2.6.18 Search vendor "Linux" for product "Linux Kernel" and version "2.6.18"	-	Safe
Citrix Search vendor "Citrix"	Xen Search vendor "Citrix" for product "Xen"	3.3.0 Search vendor "Citrix" for product "Xen" and version "3.3.0"	-	Affected	in	Linux Search vendor "Linux"	Linux Kernel Search vendor "Linux" for product "Linux Kernel"	2.6.18 Search vendor "Linux" for product "Linux Kernel" and version "2.6.18"	-	Safe
Citrix Search vendor "Citrix"	Xen Search vendor "Citrix" for product "Xen"	3.3.1 Search vendor "Citrix" for product "Xen" and version "3.3.1"	-	Affected	in	Linux Search vendor "Linux"	Linux Kernel Search vendor "Linux" for product "Linux Kernel"	2.6.18 Search vendor "Linux" for product "Linux Kernel" and version "2.6.18"	-	Safe