High severity7.5NVD Advisory· Published Aug 18, 2021· Updated Jun 17, 2026
CVE-2020-25767
CVE-2020-25767
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.
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Affected products
2- HCC Embedded/NicheStack IPv4description
- Range: 4.1
Patches
Vulnerability mechanics
References
2- www.forescout.com/blog/new-critical-operational-technology-vulnerabilities-found-on-nichestack/nvdMitigationThird Party Advisory
- www.kb.cert.org/vuls/id/608209nvdThird Party AdvisoryUS Government Resource
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