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Mallory
Medium

Authentication bypass in Google Quick Share for Windows unknown-file handling

IdentifiersCVE-2024-10668CWE-288

CVE-2024-10668 is an authentication/session-bypass flaw in Google Quick Share for Windows that allows an attacker to cause an unknown file type to be written to the victim's Downloads folder. According to the provided description, the issue is triggered by sending a Payload Transfer frame of type FILE to Quick Share, which causes the embedded file to be written to disk. Quick Share is intended to delete unknown file types, but the deletion logic can be bypassed by sending two FILE Payload Transfer frames that reuse the same payload ID. In that condition, the cleanup logic deletes only the first file and leaves the second file on disk. The root cause, based on the supplied information, is flawed validation/state handling around duplicate payload IDs and post-write deletion of unapproved file types.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation allows an attacker to bypass Quick Share's intended protection against unknown file types and place an attacker-controlled file in the victim's Downloads folder. This is an unauthorized file write to disk and may enable follow-on social engineering or local execution scenarios if the victim later opens the file. The provided material does not establish direct remote code execution from this CVE alone, but it does confirm unauthorized file delivery/persistence on the target system.

Mitigation

If you can’t patch tonight, do this now.

Apply the vendor update. Until patched, reduce exposure by disabling Quick Share when not needed, limiting device visibility/sharing acceptance settings, and avoiding acceptance of transfers from untrusted nearby devices. Because the attack is proximity-based, restricting use in untrusted physical environments also reduces risk.

Remediation

Patch, then assume compromise.

Upgrade Google Quick Share for Windows to a version newer than commit 5d8b9156e0c339d82d3dab0849187e8819ad92c0, or update to Quick Share for Windows v1.0.2002.2 or later, as recommended in the provided content.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType
GoogleQuick Shareapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.
Exposure mapping

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Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity

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