CVE-2023-38505 Information

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.

Reference

https://github.com/ravenclaw900/DietPi-Dashboard/commit/79cd78615d28f577454415e4baafe4dcd9d09666 https://asciinema.org/a/8nRKbdf7AkPLmP3QxFZUSmPwp?t=7 https://github.com/ravenclaw900/DietPi-Dashboard/security/advisories/GHSA-3jr4-9rxf-fr44 https://github.com/ravenclaw900/DietPi-Dashboard/pull/606