CVE-2020-25767

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 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.

Se ha detectado un problema en HCC Embedded NicheStack IPv4 versión 4.1. La rutina dnc_copy_in para analizar los nombres de dominio DNS no comprueba si un puntero de compresión de nombre de dominio está apuntando dentro de los límites del paquete (por ejemplo, los saltos de puntero de compresión hacia adelante están permitidos), lo que conlleva a una Lectura Fuera de Límites, y una Denegación de Servicio como consecuencia.

*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

2020-09-18 CVE Reserved
2021-08-18 CVE Published
2024-05-03 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-125: Out-of-bounds Read

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 Ipv4 Search vendor "Hcc-embedded" for product "Nichestack Ipv4"				4.1 Search vendor "Hcc-embedded" for product "Nichestack Ipv4" and version "4.1"		-		Affected