CVE-2021-31227

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An issue was discovered in HCC embedded InterNiche 4.0.1. A potential heap buffer overflow exists in the code that parses the HTTP POST request, due to an incorrect signed integer comparison. This vulnerability requires the attacker to send a malformed HTTP packet with a negative Content-Length, which bypasses the size checks and results in a large heap overflow in the wbs_multidata buffer copy.

Se ha detectado un problema en HCC embedded InterNiche versión 4.0.1. Se presenta un potencial desbordamiento del búfer de la pila en el código que analiza la petición HTTP POST, debido a una comparación incorrecta de enteros con signo. Esta vulnerabilidad requiere que el atacante envíe un paquete HTTP malformado con un Content-Length negativo, que omita las comprobaciones de tamaño y resulte en un gran desbordamiento de la pila en la copia del buffer wbs_multidata.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-04-15 CVE Reserved
2021-08-19 CVE Published
2024-05-04 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-787: Out-of-bounds Write

CAPEC

References (2)

URL	Tag	Source
https://www.forescout.com/blog/new-critical-operational-technology-vulnerabilities-found-on-nichestack	Mitigation
https://www.kb.cert.org/vuls/id/608209	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Hcc-embedded Search vendor "Hcc-embedded"		Nichestack Search vendor "Hcc-embedded" for product "Nichestack"				< 4.3 Search vendor "Hcc-embedded" for product "Nichestack" and version " < 4.3"		-		Affected