// For flags

CVE-2021-34584

CODESYS V2 web server: crafted requests could trigger a buffer over-read (DoS)

Severity Score

9.1
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

Crafted web server requests can be utilised to read partial stack or heap memory or may trigger a denial-of- service condition due to a crash in the CODESYS V2 web server prior to V1.1.9.22.

Unas peticiones del servidor web diseñadas pueden ser usadas para leer parcialmente la pila o la memoria de la pila o pueden desencadenar una situación de denegación de servicio debido a un bloqueo en el servidor web de CODESYS V2 versiones anteriores a 1.1.9.22

*Credits: This vulnerability was discovered by Tenable Research.
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-06-10 CVE Reserved
  • 2021-10-26 CVE Published
  • 2024-09-16 CVE Updated
  • 2024-09-16 EPSS Updated
  • 2024-09-16 First Exploit
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-126: Buffer Over-read
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Codesys
Search vendor "Codesys"
 Codesys
Search vendor "Codesys" for product "Codesys"
 < 1.1.9.22
Search vendor "Codesys" for product "Codesys" and version " < 1.1.9.22"
-
Affected