CVE-2024-23340
@hono/node-server cannot handle "double dots" in URL
Description
### Impact Since v1.3.0, we use our own Request object. This is great, but the `url` behavior is unexpected. In the standard API, if the URL contains `..`, here called "double dots", the URL string returned by Request will be in the resolved path. ```ts const req = new Request('http://localhost/static/../foo.txt') // Web-standards console.log(req.url) // http://localhost/foo.txt ``` However, the `url` in our Request does not resolve double dots, so `http://localhost/static/.. /foo.txt` is returned. ```ts const req = new Request('http://localhost/static/../foo.txt') console.log(req.url) // http://localhost/static/../foo.txt ``` It will pass unresolved paths to the web application. This causes vulnerabilities like #123 when using `serveStatic`. Note: Modern web browsers and a latest `curl` command resolve double dots on the client side, so it does not affect you if the user uses them. However, problems may occur if accessed by a client that does not resolve them. ### Patches "v1.4.1" includes the change to fix this issue. ### Workarounds Don't use `serveStatic`.
How to fix CVE-2024-23340
To remediate CVE-2024-23340, upgrade the affected package to a fixed version below.
- —upgrade to 1.4.1 or later
Is CVE-2024-23340 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 1.3.0, < 1.4.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |