CVE-2020-11637

Automation Runtime TFTP Service DoS Vulnerability

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A memory leak in the TFTP service in B&R Automation Runtime versions <N4.26, <N4.34, <F4.45, <E4.53, <D4.63, <A4.73 and prior could allow an unauthenticated attacker with network access to cause a denial of service (DoS) condition.

Una pérdida de memoria en el servicio TFTP en B&R Automation Runtime en versiones anteriores a N4.26, anteriores a N4.34, anteriores a F4.45, anteriores a E4.53, anteriores a D4.63, anteriores a A4.73 y anteriores, podría permitir a un atacante no autenticado con acceso de red causar una condición de denegación de servicio (DoS)

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

Low

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-04-08 CVE Reserved
2020-10-15 CVE Published
2023-07-01 EPSS Updated
2024-09-16 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-401: Missing Release of Memory after Effective Lifetime

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://www.br-automation.com/downloads_br_productcatalogue/assets/1595163815396-de-original-1.0.pdf	2021-09-14

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Br-automation Search vendor "Br-automation"		Automation Runtime Search vendor "Br-automation" for product "Automation Runtime"				<= 4.10 Search vendor "Br-automation" for product "Automation Runtime" and version " <= 4.10"		-		Affected
Br-automation Search vendor "Br-automation"		Automation Runtime Search vendor "Br-automation" for product "Automation Runtime"				>= 4.20 < n4.26 Search vendor "Br-automation" for product "Automation Runtime" and version " >= 4.20 < n4.26"		-		Affected
Br-automation Search vendor "Br-automation"		Automation Runtime Search vendor "Br-automation" for product "Automation Runtime"				>= 4.40 < f4.45 Search vendor "Br-automation" for product "Automation Runtime" and version " >= 4.40 < f4.45"		-		Affected
Br-automation Search vendor "Br-automation"		Automation Runtime Search vendor "Br-automation" for product "Automation Runtime"				>= 4.50 < e4.53 Search vendor "Br-automation" for product "Automation Runtime" and version " >= 4.50 < e4.53"		-		Affected
Br-automation Search vendor "Br-automation"		Automation Runtime Search vendor "Br-automation" for product "Automation Runtime"				>= 4.60 < d4.63 Search vendor "Br-automation" for product "Automation Runtime" and version " >= 4.60 < d4.63"		-		Affected
Br-automation Search vendor "Br-automation"		Automation Runtime Search vendor "Br-automation" for product "Automation Runtime"				>= 4.70 < a4.73 Search vendor "Br-automation" for product "Automation Runtime" and version " >= 4.70 < a4.73"		-		Affected
Br-automation Search vendor "Br-automation"		Automation Runtime Search vendor "Br-automation" for product "Automation Runtime"				>= 4.30 < n4.34 Search vendor "Br-automation" for product "Automation Runtime" and version " >= 4.30 < n4.34"		-		Affected