Executive Summary

Informations
Name CVE-2021-39921 First vendor Publication 2021-11-19
Vendor Cve Last vendor Modification 2023-11-07

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Overall CVSS Score 7.5
Base Score 7.5 Environmental Score 7.5
impact SubScore 3.6 Temporal Score 7.5
Exploitabality Sub Score 3.9
 
Attack Vector Network Attack Complexity Low
Privileges Required None User Interaction None
Scope Unchanged Confidentiality Impact None
Integrity Impact None Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:N/I:N/A:P)
Cvss Base Score 5 Attack Range Network
Cvss Impact Score 2.9 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

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

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39921

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-476 NULL Pointer Dereference

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 231
Os 1
Os 2

Sources (Detail)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedora...
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedora...
Source Url
CONFIRM https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39921.json
DEBIAN https://www.debian.org/security/2021/dsa-5019
GENTOO https://security.gentoo.org/glsa/202210-04
MISC https://gitlab.com/wireshark/wireshark/-/issues/17703
https://www.wireshark.org/security/wnpa-sec-2021-14.html
MLIST https://lists.debian.org/debian-lts-announce/2021/12/msg00015.html

Alert History

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Date Informations
2023-11-07 21:33:22
  • Multiple Updates
2022-10-29 00:27:54
  • Multiple Updates
2022-10-16 21:27:20
  • Multiple Updates
2022-03-10 00:23:13
  • Multiple Updates
2021-12-27 00:23:00
  • Multiple Updates
2021-12-16 21:23:07
  • Multiple Updates
2021-12-11 17:23:00
  • Multiple Updates
2021-12-03 09:22:57
  • Multiple Updates
2021-11-24 17:22:57
  • Multiple Updates
2021-11-19 21:22:54
  • First insertion