CVE-2019-12789

Public Exploit

Description

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.

6.8

CVSS

Severity: Medium

CVSS 3.0 •

CVSS 2.0 •

EPSS 0.14%

Third-Party Advisory seclists.org Third-Party Advisory actiontec.com

Affected: n/a n/a

References

Link	Tags
https://www.actiontec.com/blog/	third party advisory
http://seclists.org/fulldisclosure/2019/Jun/10	mailing list exploit third party advisory

Frequently Asked Questions

What is the severity of CVE-2019-12789?: CVE-2019-12789 has been scored as a medium severity vulnerability.
How to fix CVE-2019-12789?: To fix CVE-2019-12789, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-12789 being actively exploited in the wild?: It is possible that CVE-2019-12789 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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