Description
An issue was discovered in HCC Embedded NicheStack IPv4 4.1. The dnc_copy_in routine for parsing DNS domain names does not check whether a domain name compression pointer is pointing within the bounds of the packet (e.g., forward compression pointer jumps are allowed), which leads to an Out-of-bounds Read, and a Denial-of-Service as a consequence.
References (2)
Core 2
Core References
Mitigation, Third Party Advisory x_refsource_misc
https://www.forescout.com/blog/new-critical-operational-technology-vulnerabilities-found-on-nichestack/
Third Party Advisory, US Government Resource third-party-advisory
x_refsource_cert-vn
https://www.kb.cert.org/vuls/id/608209
Scores
CVSS v3
7.5
EPSS
0.0039
EPSS Percentile
60.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-125
Status
published
Products (1)
hcc-embedded/nichestack_ipv4
4.1
Published
Aug 18, 2021
Tracked Since
Feb 18, 2026