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Automatic information enumeration - Personal Information

Description​

It is possible to list information and login method of the platform users, since a token associated to the account is not used to consult the information, thus leaving open the possibility to consult information of other users.

Impact​

  • Identify users login method.
  • Obtain strategic information. from users accounts.

Recommendation​

Implement controls with cookies or session tokens to limit the information viewed by a user.

Threat​

Authenticated attacker from the Internet.

Expected Remediation Time​

⌚ 60 minutes.

Score​

Default score using CVSS 3.1. It may change depending on the context of the vulnerability.

Base​

  • Attack vector: N
  • Attack complexity: L
  • Privileges required: L
  • User interaction: N
  • Scope: U
  • Confidentiality: L
  • Integrity: N
  • Availability: N

Temporal​

  • Exploit code madurity: X
  • Remediation level: X
  • Report confidence: X

Result​

  • Vector string: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:X/RL:X/RC:X
  • Score:
    • Base: 4.3
    • Temporal: 4.3
  • Severity:
    • Base: Medium
    • Temporal: Medium

Code Examples​

Compliant code​

The application correctly validates the user session token before allowing access to user information

const accessHandler = (req, res) => {
  // get users credentials from the JSON body
  const { username, password } = req.body
  if (!isValidUser(username, password)) {
    res.status(401).end();
    return;
  }
  // Return user information according to the sessionToken
  return UserInformation(username, req.body.sessionToken);
}

Non compliant code​

The application does not verify the session token before allowing access to sensitive information

const accessHandler = (req, res) => {
  // get users credentials from the JSON body
  const { username, password } = req.body
  if (!username || !password) {
    res.status(401).end();
    return;
  }
  // Return user information without using token control
  return UserInformation(username);
}

Requirements​

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