CVE-2019-18988

Basic Information

CVE State

PUBLISHED

Reserved Date

November 15, 2019

Published Date

February 07, 2020

Last Updated

February 04, 2025

Vendor

n/a

Product

n/a

Description

TeamViewer Desktop through 14.7.1965 allows a bypass of remote-login access control because the same key is used for different customers' installations. It used a shared AES key for all installations since at least as far back as v7.0.43148, and used it for at least OptionsPasswordAES in the current version of the product. If an attacker were to know this key, they could decrypt protect information stored in the registry or configuration files of TeamViewer. With versions before v9.x , this allowed for attackers to decrypt the Unattended Access password to the system (which allows for remote login to the system as well as headless file browsing). The latest version still uses the same key for OptionPasswordAES but appears to have changed how the Unattended Access password is stored. While in most cases an attacker requires an existing session on a system, if the registry/configuration keys were stored off of the machine (such as in a file share or online), an attacker could then decrypt the required password to login to the system.

CVSS Scores

SSVC Information

Exploitation

active

Technical Impact

partial

Exploit Status

Exploited in the Wild

Yes (added 2021-11-03 00:00:00 UTC) Source

Proof of Concept Available

Yes (added 2020-07-01 09:56:29 UTC) Source