CVE-2023-38505 DietPi-Dashboard Insufficient TLS Handshake Pool
An attacker can cause a denial of service by initiating a TLS connection and never completing the handshake, blocking legitimate users from accessing the dashboard.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-38505?
CVE-2023-38505 is a high-severity denial of service vulnerability in ravenclaw900 DietPi-Dashboard, published on 27 Jul 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
DietPi-Dashboard is a web dashboard for the operating system DietPi. The dashboard only allows for one TLS handshake to be in process at a given moment. Once a TCP connection is established in HTTPS mode, it will assume that it should be waiting for a handshake, and will stay this way indefinitely until a handshake starts or some error occurs. In version 0.6.1, this can be exploited by simply not starting the handshake, preventing any other TLS handshakes from getting through. An attacker can lock the dashboard in a state where it is waiting for a TLS handshake from the attacker, who won't provide it. This prevents any legitimate traffic from getting to the dashboard, and can last indefinitely. Version 0.6.2 has a patch for this issue. As a workaround, do not use HTTPS mode on the open internet where anyone can connect. Instead, put a reverse proxy in front of the dashboard, and have it handle any HTTPS connections.
Which versions are affected by CVE-2023-38505?
It affects 1 product.
Products include Dietpi-Dashboard Project Dietpi-Dashboard.
How do I fix CVE-2023-38505?
No fix has been published for CVE-2023-38505 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2023-38505 being exploited?
There is no known exploitation of CVE-2023-38505 in the wild and no public exploit code.
Sources
Also known as GHSA-3jr4-9rxf-fr44.