CVE-2020-6087

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An exploitable denial of service vulnerability exists in the ENIP Request Path Data Segment functionality of Allen-Bradley Flex IO 1794-AENT/B. A specially crafted network request can cause a loss of communications with the device resulting in denial-of-service. An attacker can send a malicious packet to trigger this vulnerability If the ANSI Extended Symbol Segment Sub-Type is supplied, the device treats the byte following as the Data Size in words. When this value represents a size greater than what remains in the packet data, the device enters a fault state where communication with the device is lost and a physical power cycle is required.

Se presenta una vulnerabilidad de denegación de servicio explotable en la funcionalidad ENIP Request Path Data Segment de Allen-Bradley Flex IO 1794-AENT/B. Una petición de red especialmente diseñada puede causar una pérdida de comunicaciones con el dispositivo resultando en una denegación de servicio. Un atacante puede enviar un paquete malicioso para activar esta vulnerabilidad. Si el ANSI Extended Symbol Segment Sub-Type es suministrado, el dispositivo trata el byte siguiente como el Data Size en palabras. Cuando este valor representa un tamaño mayor que el que queda en el paquete de datos, el dispositivo entra en un estado de fallo donde la comunicación con el dispositivo se pierde y un ciclo de energía físico es requerido

*Credits: N/A

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

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-01-07 CVE Reserved
2020-10-14 CVE Published
2024-08-04 CVE Updated
2024-08-04 First Exploit
2024-10-21 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC
https://talosintelligence.com/vulnerability_reports/TALOS-2020-1007	2024-08-04

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Rockwellautomation Search vendor "Rockwellautomation"	Flex I\/o 1794-aent\/b Firmware Search vendor "Rockwellautomation" for product "Flex I\/o 1794-aent\/b Firmware"	4.003 Search vendor "Rockwellautomation" for product "Flex I\/o 1794-aent\/b Firmware" and version "4.003"	-	Affected	in	Rockwellautomation Search vendor "Rockwellautomation"	Flex I\/o 1794-aent\/b Search vendor "Rockwellautomation" for product "Flex I\/o 1794-aent\/b"	-	-	Safe