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vulnerabilities.md

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Existing Vulnerabilities

  • SQLi
  • IDOR
  • XSS
  • Open Redirect
  • CSRF

SQLi

When searching a post, keyword search param is not escaped.

/search?keyword=

http://localhost:4000/search?keyword=a%25%27%20AND%20SLEEP(5)%20AND%20%27a%27%20LIKE%20%27%25a

Limited SQLi

Knex v2.3.0 causes it.

When db parameter is an object, this version of knex directly stringify the object into JSON string and directly send to DB without any validation or sanitization.

// Will throw an error (You can see json string is directly injected to the sql query from the error message)
http://localhost:4000/search?user_id[non_exist_param]=test

// Won't throw an error
http://localhost:4000/search?user_id[name]=test

Ref: https://www.ghostccamm.com/blog/knex_sqli/

IDOR

Attackers can change other user's username by modifying :userId route parameter.

POST /users/:userId

XSS

Self Stored XSS

Username on the top nav bar is not escaped.

You can reproduce XSS easily by changing your user name in the profile edit page.

<script>alert('XSS')</script>

Stored XSS (Action Required)

User links are vulnerable against URLs with javascript: protocol.

You can set user links from the profile edit page. The links will be shown on the user's profile page.

Open Redirect

from parameter, which is used to determine where to redirect after creating a comment and deleting a comment or a post, is not validated.

POST /posts/:postId/delete
POST /comments
POST /comments/:commentId/delete

CSRF

No CSRF prevention has been implemented. All forms are vulnerable against CSRF. (Anti-CSRF token will be introduced.)

Others

SSH key pairs, dev-only-kowaseru-access and dev-only-kowaseru-access.pub, are not being used by any services. They are generated to check behavior of conventional secret scanners.