VULNERABILITY INTELLIGENCE

CVE-2021-31228

CVSS score7.5 HIGH

EPSS probability1.27%

CISA KEVNot currently listed

Published2021-08-19

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Description

An issue was discovered in HCC embedded InterNiche 4.0.1. This vulnerability allows the attacker to predict a DNS query's source port in order to send forged DNS response packets that will be accepted as valid answers to the DNS client's requests (without sniffing the specific request). Data is predictable because it is based on the time of day, and has too few bits.

Weakness classification

nvd@nist.gov: CWE-330

Primary references

cve@mitre.org — Mitigation, Third Party Advisory
cve@mitre.org — Third Party Advisory, US Government Resource
af854a3a-2127-422b-91ae-364da2661108 — Mitigation, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory, US Government Resource