// For flags

CVE-2021-39921

 

Severity Score

7.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

NULL pointer exception in the Modbus dissector in Wireshark 3.4.0 to 3.4.9 and 3.2.0 to 3.2.17 allows denial of service via packet injection or crafted capture file

Una excepción de puntero NULL en el disector Modbus en Wireshark versiones 3.4.0 a 3.4.9 y 3.2.0 a 3.2.17, permite una denegación de servicio por medio de una inyección de paquetes o de un archivo de captura diseñado

*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
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-08-23 CVE Reserved
  • 2021-11-18 CVE Published
  • 2024-06-25 EPSS Updated
  • 2024-08-04 CVE Updated
  • 2024-08-04 First Exploit
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-476: NULL Pointer Dereference
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Wireshark
Search vendor "Wireshark"
Wireshark
Search vendor "Wireshark" for product "Wireshark"
>= 3.2.0 <= 3.2.17
Search vendor "Wireshark" for product "Wireshark" and version " >= 3.2.0 <= 3.2.17"
-
Affected
Wireshark
Search vendor "Wireshark"
Wireshark
Search vendor "Wireshark" for product "Wireshark"
>= 3.4.0 <= 3.4.9
Search vendor "Wireshark" for product "Wireshark" and version " >= 3.4.0 <= 3.4.9"
-
Affected
Fedoraproject
Search vendor "Fedoraproject"
Fedora
Search vendor "Fedoraproject" for product "Fedora"
34
Search vendor "Fedoraproject" for product "Fedora" and version "34"
-
Affected
Fedoraproject
Search vendor "Fedoraproject"
Fedora
Search vendor "Fedoraproject" for product "Fedora"
35
Search vendor "Fedoraproject" for product "Fedora" and version "35"
-
Affected
Debian
Search vendor "Debian"
Debian Linux
Search vendor "Debian" for product "Debian Linux"
9.0
Search vendor "Debian" for product "Debian Linux" and version "9.0"
-
Affected