A severe vulnerability has been discovered in the Google Drive Desktop application for Windows. In shared environments—like offices or labs—a user with local access can exploit the Drive cache (DriveFS) to gain complete access to another user's Drive account without credentials or re-authentication Cyber Security NewsDEV Community.
Vulnerability Details
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Root Cause: The DriveFS cache lacks isolation between Windows user profiles. If one user copies the directory (
C:\Users\<victim>\AppData\Local\Google\DriveFS\<ID>\) into their own profile and restarts the app, they inherit full access to the victim's Drive—including "My Drive" and shared drives DEV CommunityMedium. -
Security Failures:
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Zero Trust Violated: Cached data is implicitly trusted without verifying account identity.
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Encryption at Rest Missing: Caches are stored in plaintext and can be reused across profiles.
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No Re-authentication Required: Google Drive loads the victim’s drive without credential checks Cyber Security NewsDEV Community.
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Insider Threat Vector: This flaw is especially dangerous in shared or public systems—any user with sufficient rights can extract sensitive documents silently Cyber Security NewsMedium.
Impact Assessment
| Threat Type | Impact |
|---|---|
| Data Compromise | Access trade secrets, HR data, financials, or source code from another user’s Drive. |
| Compliance Risk | Violates standards like Zero Trust, GDPR, HIPAA, PCI-DSS, SOC 2, and NIST. |
| Silent Exploitation | No alert, no logs, and seamless access upon app restart. |
Mitigation Recommendations
For Google/Developers:
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Encrypt DriveFS Cache: Tie encrypted caches to specific credentials.
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Enforce Re-authentication: Prompt for login when loading cached data.
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Apply OS-Level ACLs: Prevent DriveFS from being accessed across profiles.
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Cache Revocation Controls: Enable remote invalidation of DriveFS caches DEV CommunityMedium.
For IT Administrators and Users (Short-Term):
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Avoid using Google Drive Desktop on shared machines.
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Delete the DriveFS cache before switching users.
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Use separate locked-down user profiles for each user.
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Limit installation of Drive Desktop to managed, standalone devices only Medium.
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Cloud Workload Protection
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Zero Trust Desktop Security
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Managed Detection and Response (MDR)
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Insider Threat Defense
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Endpoint Security Solutions
CyberDudeBivash Verdict
This vulnerability is a serious insider threat—more hazardous than many remote exploits. By exploiting the Drive cache, attackers can bypass authentication entirely and access another user’s sensitive files.
CyberDudeBivash Rating: Tier-1 Urgent Risk
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