Executive Summary

Informations
Name CVE-2021-27393 First vendor Publication 2021-04-22
Vendor Cve Last vendor Modification 2022-04-22

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Overall CVSS Score 5.3
Base Score 5.3 Environmental Score 5.3
impact SubScore 1.4 Temporal Score 5.3
Exploitabality Sub Score 3.9
 
Attack Vector Network Attack Complexity Low
Privileges Required None User Interaction None
Scope Unchanged Confidentiality Impact None
Integrity Impact Low Availability Impact None
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:N/I:P/A:N)
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

A vulnerability has been identified in Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2013.08), Nucleus Source Code (Versions including affected DNS modules). The DNS client does not properly randomize UDP port numbers of DNS requests. That could allow an attacker to poison the DNS cache or spoof DNS resolving.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27393

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-330 Use of Insufficiently Random Values

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 1
Application 1
Application 1

Sources (Detail)

Source Url
MISC https://cert-portal.siemens.com/productcert/pdf/ssa-201384.pdf

Alert History

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Date Informations
2022-04-23 00:23:19
  • Multiple Updates
2022-01-11 17:23:07
  • Multiple Updates
2021-11-18 05:23:12
  • Multiple Updates
2021-11-11 09:23:12
  • Multiple Updates
2021-11-10 09:23:30
  • Multiple Updates
2021-11-09 17:23:06
  • Multiple Updates
2021-05-04 13:23:39
  • Multiple Updates
2021-04-30 17:22:49
  • Multiple Updates
2021-04-23 01:10:35
  • First insertion