CVE-2021-40833

Denial-of-Service (DoS) Vulnerability

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 vulnerability affecting F-Secure antivirus engine was discovered whereby unpacking UPX file can lead to denial-of-service. The vulnerability can be exploited remotely by an attacker. A successful attack will result in denial-of-service of the antivirus engine.

Se ha detectado una vulnerabilidad que afecta al motor antivirus de F-Secure por la que el desempaquetado de archivos UPX puede conllevar a una denegación de servicio. La vulnerabilidad puede ser explotada remotamente por un atacante. Un ataque con éxito resultará en una denegación de servicio del motor antivirus

*Credits: N/A

CVSS Scores

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-09-09 CVE Reserved
2021-11-26 CVE Published
2024-08-04 CVE Updated
2024-08-11 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-404: Improper Resource Shutdown or Release

CAPEC

References (2)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://www.f-secure.com/en/business/programs/vulnerability-reward-program/hall-of-fame	2021-11-30
https://www.f-secure.com/en/business/support-and-downloads/security-advisories/cve-2021-40833	2021-11-30

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
F-secure Search vendor "F-secure"	Elements Endpoint Protection Search vendor "F-secure" for product "Elements Endpoint Protection"	-	-	Affected	in	Apple Search vendor "Apple"	Macos Search vendor "Apple" for product "Macos"	-	-	Safe
F-secure Search vendor "F-secure"	Elements Endpoint Protection Search vendor "F-secure" for product "Elements Endpoint Protection"	-	-	Affected	in	Microsoft Search vendor "Microsoft"	Windows Search vendor "Microsoft" for product "Windows"	-	-	Safe
F-secure Search vendor "F-secure"		Atlant Search vendor "F-secure" for product "Atlant"				-		-		Affected
F-secure Search vendor "F-secure"		Internet Gatekeeper Search vendor "F-secure" for product "Internet Gatekeeper"				-		-		Affected
F-secure Search vendor "F-secure"		Linux Security Search vendor "F-secure" for product "Linux Security"				-		x86		Affected
F-secure Search vendor "F-secure"		Linux Security 64 Search vendor "F-secure" for product "Linux Security 64"				-		-		Affected