Executive Summary

Informations
Name CVE-2020-35685 First vendor Publication 2021-08-19
Vendor Cve Last vendor Modification 2021-08-26

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Overall CVSS Score 9.1
Base Score 9.1 Environmental Score 9.1
impact SubScore 5.2 Temporal Score 9.1
Exploitabality Sub Score 3.9
 
Attack Vector Network Attack Complexity Low
Privileges Required None User Interaction None
Scope Unchanged Confidentiality Impact High
Integrity Impact High Availability Impact None
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:P/I:P/A:N)
Cvss Base Score 6.4 Attack Range Network
Cvss Impact Score 4.9 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

An issue was discovered in HCC Nichestack 3.0. The code that generates Initial Sequence Numbers (ISNs) for TCP connections derives the ISN from an insufficiently random source. As a result, an attacker may be able to determine the ISN of current and future TCP connections and either hijack existing ones or spoof future ones. (Proper ISN generation should aim to follow at least the specifications outlined in RFC 6528.)

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-35685

CWE : Common Weakness Enumeration

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

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 1

Sources (Detail)

Source Url
CERT-VN https://www.kb.cert.org/vuls/id/608209
CONFIRM https://cert-portal.siemens.com/productcert/pdf/ssa-789208.pdf
MISC https://www.forescout.com/blog/new-critical-operational-technology-vulnerabil...
https://www.hcc-embedded.com

Alert History

If you want to see full details history, please login or register.
0
1
Date Informations
2021-08-26 21:23:12
  • Multiple Updates
2021-08-19 17:22:50
  • First insertion