National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2019-18988 Detail

Current 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.

Source:  MITRE
View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score: 7.0 HIGH
Vector:  CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://community.teamviewer.com/t5/Announcements/Specification-on-CVE-2019-18988/td-p/82264 Vendor Advisory
https://community.teamviewer.com/t5/Knowledge-Base/tkb-p/Knowledgebase?threadtype=label&labels=Security Vendor Advisory
https://twitter.com/Blurbdust/status/1224212682594770946?s=20 Third Party Advisory
https://whynotsecurity.com/blog/teamviewer/ Exploit Third Party Advisory

Weakness Enumeration

CWE-ID CWE Name Source
CWE-287 Improper Authentication NIST  

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:teamviewer:teamviewer:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
14.7.1965


Change History

1 change record found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-18988
NVD Published Date:
02/07/2020
NVD Last Modified:
02/14/2020