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CVE-2019-12789

Status Candidate

Overview

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.

Related Files

Telus Actiontec T2200H Local Privilege Escalation
Posted Jun 12, 2019
Authored by Andrew Klaus

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

tags | exploit, local
advisories | CVE-2019-12789
MD5 | e98dd080d3db4e14385e367484d9e1a8
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