CVE-2021-27565

Description

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.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 2.42% Top 20%
Third-Party Advisory cert.org Third-Party Advisory forescout.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://www.hcc-embedded.com/ product
https://www.hcc-embedded.com/about/about-interniche product
https://www.forescout.com/blog/new-critical-operational-technology-vulnerabilities-found-on-nichestack/ third party advisory mitigation
https://www.kb.cert.org/vuls/id/608209 third party advisory us government resource

Frequently Asked Questions

What is the severity of CVE-2021-27565?
CVE-2021-27565 has been scored as a high severity vulnerability.
How to fix CVE-2021-27565?
To fix CVE-2021-27565, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-27565 being actively exploited in the wild?
It is possible that CVE-2021-27565 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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