CVE-2021-27691

Severity Score

9.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Command Injection in Tenda G0 routers with firmware versions v15.11.0.6(9039)_CN and v15.11.0.5(5876)_CN , and Tenda G1 and G3 routers with firmware versions v15.11.0.17(9502)_CN or v15.11.0.16(9024)_CN allows remote attackers to execute arbitrary OS commands via a crafted action/setDebugCfg request. This occurs because the "formSetDebugCfg" function executes glibc's system function with untrusted input.

Una Inyección de Comandos en routers Tenda G0 con versiones de firmware v15.11.0.6 (9039) _CN y v15.11.0.5(5876) _CN, y routers Tenda G1 y G3 con versiones de firmware v15.11.0.17(9502) _CN o v15. 11.0.16(9024) _CN, permite a atacantes remotos ejecutar comandos arbitrarios del sistema operativo a través de una petición action/setDebugCfg deseñada. Esto ocurre porque la función "formSetDebugCfg" ejecuta la función del sistema de glibc con una entrada que no es de confianza

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-02-25 CVE Reserved
2021-04-15 CVE Published
2023-12-30 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer

CAPEC

References (1)

URL	Tag	Source
https://hackmd.io/%40aZYpdinUS2SD-yhAeHwOkw/rkhTCGzMd	X_refsource_misc

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
Tendacn Search vendor "Tendacn"	G0 Firmware Search vendor "Tendacn" for product "G0 Firmware"	15.11.0.5\(5876\)_cn Search vendor "Tendacn" for product "G0 Firmware" and version "15.11.0.5\(5876\)_cn"	-	Affected	in	Tendacn Search vendor "Tendacn"	G0 Search vendor "Tendacn" for product "G0"	-	-	Safe
Tendacn Search vendor "Tendacn"	G0 Firmware Search vendor "Tendacn" for product "G0 Firmware"	15.11.0.6\(9039\)_cn Search vendor "Tendacn" for product "G0 Firmware" and version "15.11.0.6\(9039\)_cn"	-	Affected	in	Tendacn Search vendor "Tendacn"	G0 Search vendor "Tendacn" for product "G0"	-	-	Safe
Tendacn Search vendor "Tendacn"	G1 Firmware Search vendor "Tendacn" for product "G1 Firmware"	15.11.0.16\(9024\)_cn Search vendor "Tendacn" for product "G1 Firmware" and version "15.11.0.16\(9024\)_cn"	-	Affected	in	Tendacn Search vendor "Tendacn"	G1 Search vendor "Tendacn" for product "G1"	-	-	Safe
Tendacn Search vendor "Tendacn"	G1 Firmware Search vendor "Tendacn" for product "G1 Firmware"	15.11.0.17\(9502\)_cn Search vendor "Tendacn" for product "G1 Firmware" and version "15.11.0.17\(9502\)_cn"	-	Affected	in	Tendacn Search vendor "Tendacn"	G1 Search vendor "Tendacn" for product "G1"	-	-	Safe
Tendacn Search vendor "Tendacn"	G3 Firmware Search vendor "Tendacn" for product "G3 Firmware"	15.11.0.16\(9024\)_cn Search vendor "Tendacn" for product "G3 Firmware" and version "15.11.0.16\(9024\)_cn"	-	Affected	in	Tendacn Search vendor "Tendacn"	G3 Search vendor "Tendacn" for product "G3"	-	-	Safe
Tendacn Search vendor "Tendacn"	G3 Firmware Search vendor "Tendacn" for product "G3 Firmware"	15.11.0.17\(9502\)_cn Search vendor "Tendacn" for product "G3 Firmware" and version "15.11.0.17\(9502\)_cn"	-	Affected	in	Tendacn Search vendor "Tendacn"	G3 Search vendor "Tendacn" for product "G3"	-	-	Safe