Vulnerability in Hcc-Embedded Nichestack
CVE-2021-27565
The web server in InterNiche NicheStack through 4.0.1 allows remote attackers to cause a denial of service (infinite loop and networking outage) via an unexpected valid HTTP request such as OPTIONS. This occurs because the HTTP request handler enters a miscoded wbs_loop() debugger hook.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.026 (84.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 84.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.026 · newest: 0.026 · change: 0.000
Affected products
Weakness classification (CWE)
References
- www.hcc-embedded.com/ (Product)
- www.hcc-embedded.com/about/about-interniche (Product)
- www.forescout.com/blog/new-critical-operational-technology-vulnerabilities-foun… (Third Party Advisory, Mitigation)
- www.kb.cert.org/vuls/id/608209 (US Government Resource, Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2021-27565?
- CVE-2021-27565 is a high-severity vulnerability in Hcc-Embedded Nichestack, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 7.5/10. Published 2021-08-19.
- How severe is CVE-2021-27565?
- High severity. CVSS v3 base score is 7.5 out of 10.