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.
References
Link Resource
http://seclists.org/fulldisclosure/2019/Jun/10 Exploit Mailing List Third Party Advisory
https://www.actiontec.com/blog/ Third Party Advisory
History

No history.

cve-icon MITRE Information

Status: PUBLISHED

Assigner: mitre

Published: 2019-06-17T16:19:57

Updated: 2019-06-17T16:19:57

Reserved: 2019-06-10T00:00:00


Link: CVE-2019-12789

JSON object: View

cve-icon NVD Information

Status : Analyzed

Published: 2019-06-17T17:15:11.193

Modified: 2020-08-24T17:37:01.140


Link: CVE-2019-12789

JSON object: View

cve-icon Redhat Information

No data.