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CVE-2021-27565

Published: Aug 19, 2021Updated: Nov 21, 2024 Sources: CVE List NVD BDU csafCWE-835
NVD MITRE
7.5CVSSHIGH
EPSS Score
2.6%
Top 16.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-835

Affected Products

n/an/a
nichestackhcc-embedded
Embedded
Operating Systems / rtos-embedded-os
NicheLiteHCC Embedded
Embedded
ICS / OT / IoT / medical-device
InterNicheHCC Embedded
Embedded
ICS / OT / IoT / medical-device
hcc-embeddedcommercialOperating Systemsaka nichestack, interniche, nichestack tcp/ip
hcc embeddedcommercialICS / OT / IoTaka interniche, nichelite

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available
Workaround Available

MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://www.hcc-embedded.com/
hcc-embedded.com
https://www.hcc-embedded.com/about/about-interniche
hcc-embedded.com
https://www.forescout.com/blog/new-critical-operational-technology-vulnerabilities-found-on-nichestack/
forescout.com
and 30 more references View all →

Timeline

Published
Aug 19, 2021
Last Updated
Nov 21, 2024

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