CVE-2019-15316 Race condition in n/a
Local attackers can escalate privileges to SYSTEM via a race condition in Steam Client for Windows due to weak folder permissions.
- 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-2019-15316?
CVE-2019-15316 is a high-severity vulnerability in n/a, published on 21 Aug 2019. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Valve Steam Client for Windows through 2019-08-20 has weak folder permissions, leading to privilege escalation (to NT AUTHORITY\SYSTEM) via crafted use of CreateMountPoint.exe and SetOpLock.exe to leverage a TOCTOU race condition.
Which versions are affected by CVE-2019-15316?
It affects 1 product.
Products include Valvesoftware Steam Client.
How do I fix CVE-2019-15316?
No fix has been published for CVE-2019-15316 yet. Limit exposure of the affected software until one is available.
Is CVE-2019-15316 being exploited?
There is no known exploitation of CVE-2019-15316 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-x7v3-vhf3-7wrh.