CVE-2020-29568

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An issue was discovered in Xen through 4.14.x. Some OSes (such as Linux, FreeBSD, and NetBSD) are processing watch events using a single thread. If the events are received faster than the thread is able to handle, they will get queued. As the queue is unbounded, a guest may be able to trigger an OOM in the backend. All systems with a FreeBSD, Linux, or NetBSD (any version) dom0 are vulnerable.

Se detectó un problema en Xen versiones hasta 4.14.x. Algunos Sistemas Operativos (como Linux, FreeBSD y NetBSD) procesan eventos de observación usando un solo hilo o sub-proceso. Si los eventos se reciben más rápido de lo que el hilo es capaz de manejar, se pondrán en cola. Como la cola no tiene límites, un invitado puede activar un OOM en el backend. Todos los sistemas con FreeBSD, Linux o NetBSD (cualquier versión) dom0 son vulnerables

*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

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-12-04 CVE Reserved
2020-12-15 CVE Published
2023-03-08 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-770: Allocation of Resources Without Limits or Throttling

CAPEC

References (5)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html	Mailing List
https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html	Mailing List

URL	Date	SRC

URL	Date	SRC
https://xenbits.xenproject.org/xsa/advisory-349.html	2022-04-26

URL	Date	SRC
https://security.gentoo.org/glsa/202107-30	2022-04-26
https://www.debian.org/security/2021/dsa-4843	2022-04-26

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"				<= 4.14.1 Search vendor "Xen" for product "Xen" and version " <= 4.14.1"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0"		-		Affected