CVE-2023-3181 Insecure Permissions in Splashtop Software Updater
Standard users can achieve SYSTEM privileges by hijacking a DLL in a world-writable temporary folder used by the Splashtop Software Updater.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-3181?
CVE-2023-3181 is a high-severity vulnerability in Splashtop Software Updater, published on 25 Jan 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-379
Which versions are affected by CVE-2023-3181?
It affects 5 products.
Products include Splashtop Mirroring360 Receiver, Splashtop Mirroring360 Sender, Splashtop Splashtop, Splashtop Splashtop for Rmm, Splashtop Streamer.
How do I fix CVE-2023-3181?
No fix has been published for CVE-2023-3181 yet. Limit exposure of the affected software until one is available.
Is CVE-2023-3181 being exploited?
There is no known exploitation of CVE-2023-3181 in the wild and no public exploit code.
Sources
Also known as GHSA-vp9f-3rqh-83pc.