Out-of-bounds Read in Hcc-Embedded Nichestack Ipv4
CVE-2020-25767
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.
Vulnerability class: Buffer Overflow
EPSS: 0.015 (70.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Hcc-embedded Nichestack_ipv4 — versions 4.1
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (Third Party Advisory, x_refsource_MISC, Mitigation)
- cve@mitre.org (US Government Resource, x_refsource_CERT-VN, Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2020-25767?
- CVE-2020-25767 is a high-severity vulnerability in Hcc-Embedded Nichestack Ipv4, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2021-08-18.
- How severe is CVE-2020-25767?
- High severity. CVSS v3 base score is 7.5 out of 10.