Arbitrary File Read

Affecting http_server package, ALL versions

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Overview

http_server is a http server module

Affected versions of this package are vulnerable to Arbitrary File Read. It is a path traversal attack (also known as directory traversal) that aims to access files and directories that are stored outside the web root folder. By manipulating variables that reference files with “dot-dot-slash (../)” sequences and its variations or by using absolute file paths, it may be possible to access arbitrary files and directories stored on file system including application source code or configuration and critical system files.

PoC by lightangel1412

  • Install the module npm install -g http_server
  • Run 'http_server in ~/Desktop directory :
    root@kali:~/Desktop# http_server
    server running is :http://localhost:8888
  • Use cURL to access etc/passwd file: $ curl --path-as-is --url 'http://localhost:8888/../../../../../etc/passwd'

    Remediation

    There is no fixed version for http_server.

    References

  • HackerOne Report

CVSS Score

7.5
high severity
  • Attack Vector
    Network
  • Attack Complexity
    Low
  • Privileges Required
    None
  • User Interaction
    None
  • Scope
    Unchanged
  • Confidentiality
    High
  • Integrity
    None
  • Availability
    None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:P/RC:C
Credit
lightangel1412
CWE
CWE-22
Snyk ID
SNYK-JS-HTTPSERVER-1012732
Disclosed
24 Sep, 2020
Published
25 Sep, 2020