CVE-2019-18988

TeamViewer Desktop Bypass Remote Login Vulnerability

Exploitée dans des attaques Élevé 7,0 Risque d'attaque : 4,7%

De quoi s'agit-il

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.

CISA: 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).

Que faire

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Échéance pour les agences fédérales américaines : 3 mai 2022

Ajoutée à la liste de la CISA: 3 novembre 2021
Publiée: 7 février 2020
Gravité: Élevé 7,0 CVSS 3.1
Probabilité d'attaques dans les 30 prochains jours (EPSS): 4,7% dans les 8,2% les plus à risque de toutes les failles connues
Faiblesse: CWE-521
Plus de détails: NVD · CVE.org · CISA

Toutes les références (4)

Sources : Known Exploited Vulnerabilities (CISA, domaine public), CVE records (cve.org) et EPSS (FIRST). Le risque d'attaque est l'estimation EPSS qu'une personne tente d'exploiter la faille dans les 30 prochains jours.