CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
в каталога KEV от 3 ноември 2021
Атакува се в момента
Време до експлоатация
след публикуването
Атакува се локално, при специфични условия, с обикновен потребителски вход и без действие от потребителя.
- Експлоатация: активно се експлоатира
- Атаката не може да се автоматизира
Описание
Оригинално описание
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.
Засегнати продукти
- n/a n/a: n/a
Вид слабост
История
- 7 февруари 2020 Публикувано
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2019-18988
- https://nvd.nist.gov/vuln/detail/CVE-2019-18988
- https://community.teamviewer.com/t5/Knowledge-Base/tkb-p/Knowledgebase?threadtype=label&labels=Security
- https://whynotsecurity.com/blog/teamviewer/
- https://twitter.com/Blurbdust/status/1224212682594770946?s=20
- https://community.teamviewer.com/t5/Announcements/Specification-on-CVE-2019-18988/td-p/82264
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-18988