CVE-2021-3428

kernel: integer overflow in ext4_es_cache_extent

Severity Score

5.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A flaw was found in the Linux kernel. A denial of service problem is identified if an extent tree is corrupted in a crafted ext4 filesystem in fs/ext4/extents.c in ext4_es_cache_extent. Fabricating an integer overflow, A local attacker with a special user privilege may cause a system crash problem which can lead to an availability threat.

Se ha encontrado un fallo en el kernel de Linux. Es identificado un problema de denegación de servicio si es corrompido un árbol de extensiones en un sistema de archivos ext4 diseñado en el archivo fs/ext4/extents.c en la función ext4_es_cache_extent. Fabricando un desbordamiento de enteros, un atacante local con un privilegio de usuario especial puede causar un problema de bloqueo del sistema que puede conllevar a una amenaza de disponibilidad

*Credits: N/A

CVSS Scores

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

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

2021-03-10 CVE Reserved
2021-06-03 CVE Published
2023-03-08 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-190: Integer Overflow or Wraparound

CAPEC

References (4)

URL	Tag	Source
https://ubuntu.com/security/CVE-2021-3428	Third Party Advisory
https://www.openwall.com/lists/oss-security/2021/03/17/1	Mailing List

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2021-3428	2021-05-18
https://bugzilla.redhat.com/show_bug.cgi?id=1936786	2021-05-18

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.9.0 Search vendor "Linux" for product "Linux Kernel" and version " < 5.9.0"		-		Affected