CVE-2021-31228

Published: Aug 19, 2021Modified: Jun 17, 2026

7.5

Vector

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

Exploitability: 3.9 / Impact: 3.6

Source: NVD

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.

Affected (1)

Products: Hcc Embedded: Nichestack

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Hcc Embedded Nichestack	Before 4.3

Related CWEs

Use of Insufficiently Random Values

The product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers.

References (4)

https://www.forescout.com/blog/new-critical-operational-technology-vulnerabilities-found-on-nichestack/

Source: cve@mitre.org

MitigationThird Party Advisory

https://www.kb.cert.org/vuls/id/608209

Source: cve@mitre.org

Third Party AdvisoryUS Government Resource

https://www.forescout.com/blog/new-critical-operational-technology-vulnerabilities-found-on-nichestack/

Source: af854a3a-2127-422b-91ae-364da2661108

MitigationThird Party Advisory

https://www.kb.cert.org/vuls/id/608209

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party AdvisoryUS Government Resource

Timeline

No history available yet.