CVE-2018-15469

Severity Score

6.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An issue was discovered in Xen through 4.11.x. ARM never properly implemented grant table v2, either in the hypervisor or in Linux. Unfortunately, an ARM guest can still request v2 grant tables; they will simply not be properly set up, resulting in subsequent grant-related hypercalls hitting BUG() checks. An unprivileged guest can cause a BUG() check in the hypervisor, resulting in a denial-of-service (crash).

Se ha descubierto un problema en Xen hasta las versiones 4.11.x. ARM nunca implementó correctamente la tabla grant v2, ni en el hipervisor ni en Linux. Desafortunadamente, un guest de ARM todavía puede solicitar tablas grant v2; simplemente no se configurarán correctamente, lo que resultará en hiperllamadas que afectarán a las comprobaciones de BUG(). Un guest no privilegiado puede provocar una comprobación de BUG() en el hipervisor, lo que provoca una denegación de servicio (cierre inesperado).

*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

2018-08-17 CVE Reserved
2018-08-17 CVE Published
2023-08-11 EPSS Updated
2024-08-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-400: Uncontrolled Resource Consumption

CAPEC

References (3)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2018/11/msg00013.html	Mailing List

URL	Date	SRC

URL	Date	SRC
http://xenbits.xen.org/xsa/advisory-268.html	2019-03-08

URL	Date	SRC
https://security.gentoo.org/glsa/201810-06	2019-03-08

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"				<= 4.11.0 Search vendor "Xen" for product "Xen" and version " <= 4.11.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0"		-		Affected