CVE-2018-15471

Severity Score

7.8

*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 xenvif_set_hash_mapping in drivers/net/xen-netback/hash.c in the Linux kernel through 4.18.1, as used in Xen through 4.11.x and other products. The Linux netback driver allows frontends to control mapping of requests to request queues. When processing a request to set or change this mapping, some input validation (e.g., for an integer overflow) was missing or flawed, leading to OOB access in hash handling. A malicious or buggy frontend may cause the (usually privileged) backend to make out of bounds memory accesses, potentially resulting in one or more of privilege escalation, Denial of Service (DoS), or information leaks.

Se descubrió un problema en xenvif_set_hash_mapping en drivers/net/xen-netback/hash.c en el kernel de Linux hasta la versión 4.18.1, tal y como se utiliza en Xen hasta las versiones 4.11.x y otros productos. El controlador de netback de Linux permite a los frontends controlar el mapeo de las peticiones de colas de peticiones. Cuando se procesa una solicitud para establecer o cambiar este mapeo, faltaba alguna validación de entrada (por ejemplo, para un desbordamiento de un número entero) o era defectuosa, lo que llevaba al acceso OOB en el manejo de hashes. Un frontend malicioso o con errores puede hacer que el backend (normalmente privilegiado) haga accesos a la memoria fuera de límites, lo que puede resultar en uno o más escalados de privilegios, denegaciones de servicio (DoS) o fugas de información.

*Credits: N/A

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

Low

Authentication

Single

Confidentiality

Complete

Integrity

Complete

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-125: Out-of-bounds Read

CAPEC

References (8)

URL	Tag	Source
https://bugs.chromium.org/p/project-zero/issues/detail?id=1607	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/03/msg00017.html	Mailing List

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://xenbits.xen.org/xsa/advisory-270.html	2023-10-03
https://usn.ubuntu.com/3819-1	2023-10-03
https://usn.ubuntu.com/3820-1	2023-10-03
https://usn.ubuntu.com/3820-2	2023-10-03
https://usn.ubuntu.com/3820-3	2023-10-03
https://www.debian.org/security/2018/dsa-4313	2023-10-03

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
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.7 < 4.9.133 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 4.9.133"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.10 < 4.14.76 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.10 < 4.14.76"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.15 < 4.18.14 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.15 < 4.18.14"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				14.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "14.04"		lts		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				16.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "16.04"		lts		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				18.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "18.04"		lts		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				18.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "18.10"		-		Affected