CVE-2021-37748

Severity Score

8.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Multiple buffer overflows in the limited configuration shell (/sbin/gs_config) on Grandstream HT801 devices before 1.0.29 allow remote authenticated users to execute arbitrary code as root via a crafted manage_if setting, thus bypassing the intended restrictions of this shell and taking full control of the device. There are default weak credentials that can be used to authenticate.

Múltiples desbordamientos de búfer en el shell de configuración limitada (/sbin/gs_config) en los dispositivos Grandstream HT801 versiones anteriores a 1.0.29 permiten a usuarios remotos autenticados ejecutar código arbitrario como root por medio de una configuración manage_if diseñada, omitiendo así las restricciones previstas de este shell y tomando el control total del dispositivo. Se presentan credenciales débiles predeterminadas que pueden ser usadas para autenticar

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-07-30 CVE Reserved
2021-10-28 CVE Published
2024-08-04 CVE Updated
2024-08-04 First Exploit
2024-10-16 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-787: Out-of-bounds Write

CAPEC

References (3)

URL	Tag	Source

URL	Date	SRC
https://github.com/SECFORCE/CVE-2021-37748	2024-08-04
https://www.secforce.com/blog/exploiting-grandstream-ht801-ata-cve-2021-37748-cve-2021-37915	2024-08-04

URL	Date	SRC

URL	Date	SRC
http://www.grandstream.com/products/gateways-and-atas/analog-telephone-adaptors/product/ht801	2021-11-03

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Grandstream Search vendor "Grandstream"	Ht801 Firmware Search vendor "Grandstream" for product "Ht801 Firmware"	< 1.0.29 Search vendor "Grandstream" for product "Ht801 Firmware" and version " < 1.0.29"	-	Affected	in	Grandstream Search vendor "Grandstream"	Ht801 Search vendor "Grandstream" for product "Ht801"	-	-	Safe