CVE-2022-42319

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Xenstore: Guests can cause Xenstore to not free temporary memory When working on a request of a guest, xenstored might need to allocate quite large amounts of memory temporarily. This memory is freed only after the request has been finished completely. A request is regarded to be finished only after the guest has read the response message of the request from the ring page. Thus a guest not reading the response can cause xenstored to not free the temporary memory. This can result in memory shortages causing Denial of Service (DoS) of xenstored.

Xenstore: Los invitados pueden hacer que Xenstore no libere memoria temporal Cuando trabaja en una solicitud de un invitado, es posible que xenstored necesite asignar cantidades bastante grandes de memoria temporalmente. Esta memoria se libera sólo después de que la solicitud haya finalizado por completo. Una solicitud se considera finalizada sólo después de que el huésped haya leído el mensaje de respuesta de la solicitud desde la página de timbre. Por lo tanto, un invitado que no lea la respuesta puede hacer que xenstored no libere la memoria temporal. Esto puede provocar escasez de memoria y provocar Denegación de Servicio (DoS) de xenstored.

*Credits: This issue was discovered by Julien Grall of Amazon.

CVSS Scores

NISTv3.1 6.5

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2022-10-03 CVE Reserved
2022-11-01 CVE Published
2024-02-06 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-401: Missing Release of Memory after Effective Lifetime

CAPEC

References (8)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2022/11/01/6	Mailing List

URL	Date	SRC

URL	Date	SRC
http://xenbits.xen.org/xsa/advisory-416.html	2024-02-04
https://xenbits.xenproject.org/xsa/advisory-416.txt	2024-02-04

URL	Date	SRC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTMITQBGC23MSDHUCAPCVGLMVXIBXQTQ	2024-02-04
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YZVXG7OOOXCX6VIPEMLFDPIPUTFAYWPE	2024-02-04
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZLI2NPNEH7CNJO3VZGQNOI4M4EWLNKPZ	2024-02-04
https://security.gentoo.org/glsa/202402-07	2024-02-04
https://www.debian.org/security/2022/dsa-5272	2024-02-04

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"				>= 4.9.0 Search vendor "Xen" for product "Xen" and version " >= 4.9.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				11.0 Search vendor "Debian" for product "Debian Linux" and version "11.0"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				35 Search vendor "Fedoraproject" for product "Fedora" and version "35"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				36 Search vendor "Fedoraproject" for product "Fedora" and version "36"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				37 Search vendor "Fedoraproject" for product "Fedora" and version "37"		-		Affected