Known Exploited Vulnerability
7.0
HIGH
CVE-2019-18988
TeamViewer Desktop Bypass Remote Login Vulnerabili - [Actively Exploited]
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.

INFO

Published Date :

Feb. 7, 2020, 4:15 p.m.

Last Modified :

Nov. 21, 2024, 4:33 a.m.

Remotely Exploitable :

No

Impact Score :

5.9

Exploitability Score :

1.0
CISA Notification
CISA KEV (Known Exploited Vulnerabilities)

For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.

Description :

TeamViewer Desktop allows for bypass of remote-login access control because the same AES key is used for different customers' installations. If an attacker were to know this key, they could decrypt protected information stored in registry or configuration files or decryption of the Unattended Access password to the system (which allows for remote login to the system).

Required Action :

Apply updates per vendor instructions.

Notes :

https://nvd.nist.gov/vuln/detail/CVE-2019-18988

Public PoC/Exploit Available at Github

CVE-2019-18988 has a 11 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2019-18988 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Teamviewer teamviewer

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Here I gather all the resources about hacking that I find interesting

automation penetration-testing bughunting red-teaming

Ruby JavaScript

Updated: 8 months, 2 weeks ago
262 stars 48 fork 48 watcher
Born at : May 20, 2022, 7:54 p.m. This repo has been linked 20 different CVEs too.

Information and tools for working with the TeamViewer OptionsPasswordHash value

Python

Updated: 7 months, 1 week ago
1 stars 0 fork 0 watcher
Born at : May 13, 2022, 8:30 p.m. This repo has been linked 1 different CVEs too.

Ostorlab KEV: One-command to detect most remotely known exploitable vulnerabilities. Sourced from CISA KEV, Google's Tsunami, Ostorlab's Asteroid and Bug Bounty programs.

cisa-kev vulnerability 0day cisa exploits

Updated: 2 weeks, 5 days ago
548 stars 35 fork 35 watcher
Born at : April 19, 2022, 8:58 a.m. This repo has been linked 1228 different CVEs too.

None

C#

Updated: 3 years, 6 months ago
1 stars 0 fork 0 watcher
Born at : April 4, 2021, 11:38 a.m. This repo has been linked 1 different CVEs too.

None

Updated: 2 months, 2 weeks ago
34 stars 3 fork 3 watcher
Born at : March 12, 2021, 12:22 p.m. This repo has been linked 1063 different CVEs too.

None

Updated: 3 months ago
19 stars 10 fork 10 watcher
Born at : Jan. 2, 2021, 10:19 p.m. This repo has been linked 1052 different CVEs too.

None

Updated: 3 weeks, 6 days ago
86 stars 33 fork 33 watcher
Born at : Oct. 2, 2020, 2:49 p.m. This repo has been linked 1113 different CVEs too.

TeamViewer Store Credentials Decryption

Batchfile

Updated: 4 months, 1 week ago
3 stars 1 fork 1 watcher
Born at : July 13, 2020, 3:30 p.m. This repo has been linked 1 different CVEs too.

None

Python

Updated: 3 years, 1 month ago
1 stars 0 fork 0 watcher
Born at : July 1, 2020, 9:56 a.m. This repo has been linked 1 different CVEs too.

Tool to extract TeamViewer encrypted passwords from Windows Registry

PowerShell

Updated: 2 years, 6 months ago
2 stars 4 fork 4 watcher
Born at : March 26, 2020, 9:29 p.m. This repo has been linked 1 different CVEs too.

Enumerate and decrypt TeamViewer credentials from Windows registry

pentesting teamviewer

C#

Updated: 4 months, 1 week ago
239 stars 52 fork 52 watcher
Born at : Feb. 7, 2020, 7:50 a.m. This repo has been linked 1 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2019-18988 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2019-18988 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://community.teamviewer.com/t5/Announcements/Specification-on-CVE-2019-18988/td-p/82264
    Added Reference https://community.teamviewer.com/t5/Knowledge-Base/tkb-p/Knowledgebase?threadtype=label&labels=Security
    Added Reference https://twitter.com/Blurbdust/status/1224212682594770946?s=20
    Added Reference https://whynotsecurity.com/blog/teamviewer/
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CWE Remap by [email protected]

    Aug. 24, 2020

    Action Type Old Value New Value
    Changed CWE CWE-287 CWE-521
  • Initial Analysis by [email protected]

    Feb. 14, 2020

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:L/AC:M/Au:N/C:P/I:P/A:P)
    Added CVSS V3.1 NIST AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://community.teamviewer.com/t5/Announcements/Specification-on-CVE-2019-18988/td-p/82264 No Types Assigned https://community.teamviewer.com/t5/Announcements/Specification-on-CVE-2019-18988/td-p/82264 Vendor Advisory
    Changed Reference Type https://community.teamviewer.com/t5/Knowledge-Base/tkb-p/Knowledgebase?threadtype=label&labels=Security No Types Assigned https://community.teamviewer.com/t5/Knowledge-Base/tkb-p/Knowledgebase?threadtype=label&labels=Security Vendor Advisory
    Changed Reference Type https://twitter.com/Blurbdust/status/1224212682594770946?s=20 No Types Assigned https://twitter.com/Blurbdust/status/1224212682594770946?s=20 Third Party Advisory
    Changed Reference Type https://whynotsecurity.com/blog/teamviewer/ No Types Assigned https://whynotsecurity.com/blog/teamviewer/ Exploit, Third Party Advisory
    Added CWE NIST CWE-287
    Added CPE Configuration OR *cpe:2.3:a:teamviewer:teamviewer:*:*:*:*:*:*:*:* versions up to (including) 14.7.1965
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2019-18988 is associated with the following CWEs:

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.55 }} 0.19%

score

0.77258

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability