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.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25767
Reference (s):
- CERT-VN:VU#608209
- URL: https://www.kb.cert.org/vuls/id/608209
- https://www.forescout.com/blog/new-critical-operational-technology-vulnerabilities-found-on-nichestack/