// For flags

CVE-2023-3181

Insecure Permissions in Splashtop Software Updater

Severity Score

7.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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.

El proceso C:\Program Files (x86)\Splashtop\Splashtop Software Updater\uninst.exe crea una carpeta en C:\Windows\Temp~nsu.tmp y se copia en ella como Au_.exe. El archivo C:\Windows\Temp~nsu.tmp\Au_.exe se inicia automáticamente como SISTEMA cuando el sistema se reinicia o cuando un usuario estándar ejecuta una reparación de MSI utilizando el instalador de Windows de Splashtop Streamer. Dado que la carpeta C:\Windows\Temp~nsu.tmp hereda permisos de C:\Windows\Temp y Au_.exe es susceptible al secuestro de DLL, los usuarios estándar pueden escribirle una DLL maliciosa y elevar sus privilegios.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2023-06-09 CVE Reserved
  • 2024-01-25 CVE Published
  • 2024-01-31 EPSS Updated
  • 2024-08-02 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-379: Creation of Temporary File in Directory with Insecure Permissions
CAPEC
  • CAPEC-165: File Manipulation
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Splashtop
Search vendor "Splashtop"
 Software Updater
Search vendor "Splashtop" for product "Software Updater"
 <= 1.5.6.21
Search vendor "Splashtop" for product "Software Updater" and version " <= 1.5.6.21"
-
Affected
in Microsoft
Search vendor "Microsoft"
 Windows
Search vendor "Microsoft" for product "Windows"
--
Safe