Path Traversal in TeamViewer Desktop Client

Executive Summary

This vulnerability involves improper neutralization of path traversal sequences in TeamViewer Desktop Clients before version 15.81.5. An authenticated remote session participant can exploit file transfer or virtual file clipboard features to write files to unintended locations on the local file system. This could allow an attacker to achieve arbitrary file writes and potentially execute code with the privileges of the affected user.

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Detection Guidance

Detection may involve monitoring file system changes during TeamViewer sessions. Check for unexpected file writes in user directories or system folders. Review TeamViewer logs for unusual file transfer activities. No specific commands are provided in the context.

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Impact Analysis

This vulnerability could allow an attacker to write malicious files to sensitive locations on your system, potentially leading to code execution with your user privileges. This might result in data theft, system compromise, or further network infiltration if the attacker gains control of your account or system.

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Compliance Impact

This vulnerability could lead to unauthorized access or modification of sensitive data, violating confidentiality requirements in GDPR and HIPAA. Organizations using affected TeamViewer versions may face compliance violations, legal penalties, and reputational damage due to potential data breaches or unauthorized system access.

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Mitigation Strategies

Update TeamViewer Desktop Clients to version 15.81.5 or later. Restrict file transfer permissions in TeamViewer settings. Disable unnecessary file clipboard sharing. Monitor for unauthorized file writes.

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