Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') Affecting hono package, versions <4.2.7


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team

    Threat Intelligence

    Exploit Maturity
    Proof of concept
    EPSS
    0.04% (12th percentile)

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  • Snyk ID SNYK-JS-HONO-6672874
  • published 24 Apr 2024
  • disclosed 23 Apr 2024
  • credit y0d3n

How to fix?

Upgrade hono to version 4.2.7 or higher.

Overview

hono is an Ultrafast web framework for the Edges

Affected versions of this package are vulnerable to Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') such that when using serveStatic with deno, it is possible to traverse the directory where main.ts is located, leading to the retrieval of unexpected files.

PoC

import { Hono } from 'https://deno.land/x/hono@v4.2.6/mod.ts'
import { serveStatic } from 'https://deno.land/x/hono@v4.2.6/middleware.ts'

const app = new Hono()
app.use('/static/*', serveStatic({ root: './' }))

Deno.serve(app.fetch)

References

CVSS Scores

version 3.1
Expand this section

Snyk

Recommended
5.3 medium
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    Low
  • Integrity (I)
    None
  • Availability (A)
    None