All you have to do is plug out your network cable or power cord, that will stop him. So, users are highly recommended to upgrade their software to the 15.8.3, as it's hardly a matter of time before hackers started exploiting the flaw to hack into users' Windows PCs.Ī similar SMB-authentication attack vector was previously disclosed in Google Chrome, Zoom video conferencing app, and Signal messenger. A security researcher found a severe TeamViewer vulnerability affecting Windows versions of the application 8 through 15, allowing attackers to steal system. I see three possible attacks here: If required drivers are all installed (remote user can install that too) he can disable your screen and lock your keyboard to do dirty things without you seeing it but not without noticing it. Though the vulnerability is not being exploited in the wild as of now, considering the popularity of the software among millions of users, TeamViewer has always been a target of interest for attackers. The TeamViewer project has patched the vulnerability by quoting the parameters passed by the affected URI handlers e.g., URL:teamviewer10 Protocol "C:\Program Files (x86)\TeamViewer\TeamViewer.exe" "%1" This vulnerability, categorized as 'Unquoted URI handler,' affects "URI handlers teamviewer10, teamviewer8, teamviewerapi, tvchat1, tvcontrol1, tvfiletransfer1, tvjoinv8, tvpresent1, tvsendfile1, tvsqcustomer1, tvsqsupport1, tvvideocall1, and tvvpn1," Hofmann said. Now, the victim's Windows OS will "perform NTLM authentication when opening the SMB share and that request can be relayed (using a tool like responder) for code execution (or captured for hash cracking)."
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