CVE-2023-3181

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.

• splashtop mirroring360 receiver (< 2.4.0.1) • splashtop mirroring360 sender (< 1.3.0.0) • splashtop splashtop (< 3.5.6.0) • splashtop splashtop (< 3.5.8.0) • splashtop splashtop for rmm (< 3.5.8.0) • splashtop streamer (< 3.5.6.0)