CVE-2019-12789

Telus Actiontec T2200H Local Privilege Escalation

Severity Score

6.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An issue was discovered on Actiontec T2200H T2200H-31.128L.08 devices, as distributed by Telus. By attaching a UART adapter to the UART pins on the system board, an attacker can use a special key sequence (Ctrl-\) to obtain a shell with root privileges. After gaining root access, the attacker can mount the filesystem read-write and make permanent modifications to the device including bricking of the device, disabling vendor management of the device, preventing automatic upgrades, and permanently installing malicious code on the device.

Se detecto un problema en los dispositivos Actiontec T2200H T2200H-31.128L.08, distribuidos por Telus. Mediante la fijación de un adaptador UART a los pines UART en la placa base, un atacante puede utilizar una secuencia de teclas especial (Ctrl- ) para obtener un shell con privilegios root. Después de obtener acceso root, el atacante puede montar el sistema de archivos de lectura y escritura y realizar modificaciones permanentes en el dispositivo, incluido el bloqueo del dispositivo, deshabilitar la administración del proveedor del dispositivo, evitar actualizaciones automáticas e instalar permanentemente código malicioso en el dispositivo.

Telus Actiontec T2200H with firmware T2200H-31.128L.08 suffers from a local privilege escalation vulnerability.

*Credits: N/A

Attack Vector

Physical

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

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

2019-06-10 CVE Reserved
2019-06-12 CVE Published
2023-03-08 EPSS Updated
2024-08-04 CVE Updated
2024-08-04 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CAPEC

References (2)

URL	Tag	Source
https://www.actiontec.com/blog	Third Party Advisory

URL	Date	SRC
http://seclists.org/fulldisclosure/2019/Jun/10	2024-08-04

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
Actiontec Search vendor "Actiontec"	T2200h Firmware Search vendor "Actiontec" for product "T2200h Firmware"	t2200h-31.1238l.08 Search vendor "Actiontec" for product "T2200h Firmware" and version "t2200h-31.1238l.08"	-	Affected	in	Actiontec Search vendor "Actiontec"	T2200h Search vendor "Actiontec" for product "T2200h"	-	-	Safe