// For flags

CVE-2020-24685

AC500 V2 unauthenticated crafter packet vulnerability

Severity Score

8.6
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

An unauthenticated specially crafted packet sent by an attacker over the network will cause a denial-of-service (DoS) vulnerability. Vulnerability allows attacker to stop the PLC. After stopping (ERR LED flashing red), physical access to the PLC is required in order to restart the application. This issue affects: ABB AC500 V2 products with onboard Ethernet version 2.8.4 and prior versions.

Un paquete no autenticado especialmente diseñado y enviado por un atacante a través de la red causará una vulnerabilidad de denegación de servicio (DoS). Una vulnerabilidad permite a un atacante detener el PLC. Después de detenerse (LED ERR parpadeando en rojo), es requerido acceso físico al PLC para reiniciar la aplicación. Este problema afecta a: Productos ABB AC500 V2 con Ethernet integrado versión 2.8.4 d y anteriores

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
None
Availability
High
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
  • 2020-08-26 CVE Reserved
  • 2021-02-09 CVE Published
  • 2023-10-25 EPSS Updated
  • 2024-08-04 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-770: Allocation of Resources Without Limits or Throttling
  • CWE-789: Memory Allocation with Excessive Size Value
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Abb
Search vendor "Abb"
 Ac500 Cpu Firmware
Search vendor "Abb" for product "Ac500 Cpu Firmware"
 < 2.8.5
Search vendor "Abb" for product "Ac500 Cpu Firmware" and version " < 2.8.5"
-
Affected
in Abb
Search vendor "Abb"
 Pm573-eth
Search vendor "Abb" for product "Pm573-eth"
 2.0
Search vendor "Abb" for product "Pm573-eth" and version "2.0"
-
Safe
Abb
Search vendor "Abb"
 Ac500 Cpu Firmware
Search vendor "Abb" for product "Ac500 Cpu Firmware"
 < 2.8.5
Search vendor "Abb" for product "Ac500 Cpu Firmware" and version " < 2.8.5"
-
Affected
in Abb
Search vendor "Abb"
 Pm583-eth
Search vendor "Abb" for product "Pm583-eth"
 2.0
Search vendor "Abb" for product "Pm583-eth" and version "2.0"
-
Safe