CVE-2023-3181

Insecure Permissions in Splashtop Software Updater

Published Jan 25, 2024 CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Description
The C:\Program Files (x86)\Splashtop\Splashtop Software Updater\uninst.exe process creates a folder at C:\Windows\Temp~nsu.tmp and copies itself to it as Au_.exe. The C:\Windows\Temp~nsu.tmp\Au_.exe file is automatically launched as SYSTEM when the system reboots or when a standard user runs an MSI repair using Splashtop Streamer’s Windows Installer. Since the C:\Windows\Temp~nsu.tmp folder inherits permissions from C:\Windows\Temp and Au_.exe is susceptible to DLL hijacking, standard users can write a malicious DLL to it and elevate their privileges.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2023-43862 The C:\Program Files (x86)\Splashtop\Splashtop Software Updater\uninst.exe process creates a folder at C:\Windows\Temp~nsu.tmp and copies itself to it as Au_.exe. The C:\Windows\Temp~nsu.tmp\Au_.exe file is automatically launched as SYSTEM when the system reboots or when a standard user runs an MSI repair using Splashtop Streamer’s Windows Installer. Since the C:\Windows\Temp~nsu.tmp folder inherits permissions from C:\Windows\Temp and Au_.exe is susceptible to DLL hijacking, standard users can write a malicious DLL to it and elevate their privileges.
History
Type Values Removed Values Added
First Time appeared Splashtop mirroring360 Receiver
Splashtop mirroring360 Sender
Splashtop splashtop
Splashtop splashtop For Rmm
Splashtop streamer
CPEs cpe:2.3:a:splashtop:software_updater:*:*:*:*:*:*:*:* cpe:2.3:a:splashtop:mirroring360_receiver:*:*:*:*:*:*:*:*
cpe:2.3:a:splashtop:mirroring360_sender:*:*:*:*:*:*:*:*
cpe:2.3:a:splashtop:splashtop:*:*:*:*:business:*:*:*
cpe:2.3:a:splashtop:splashtop:*:*:*:*:personal:*:*:*
cpe:2.3:a:splashtop:splashtop_for_rmm:*:*:*:*:*:*:*:*
cpe:2.3:a:splashtop:streamer:*:*:*:*:-:windows:*:*
Vendors & Products Splashtop software Updater
Splashtop mirroring360 Receiver
Splashtop mirroring360 Sender
Splashtop splashtop
Splashtop splashtop For Rmm
Splashtop streamer
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Google
Published
Updated
Jun 3, 2025, 6:21 PM
Reserved
Jun 9, 2023, 9:44 AM
Status
Analyzed
Published
Jan 25, 2024, 4:15 PM
Modified
Jun 17, 2026, 6:13 AM