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Business information leak - Financial Information

Description​

Business information is obtained, such as:

  • Mail
  • Payment reference and description
  • Total value
  • Product information
  • Collectors line of business
  • Payers role

Impact​

Obtain sensitive information to create new attack vectors.

Recommendation​

According to the classification of the information found, establish the necessary controls so that the information is accessible only to the indicated persons.

Threat​

An attacker authenticated from the Internet.

Expected Remediation Time​

⌚ 120 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: U
  • Remediation level: O
  • 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:U/RL:O/RC:X
  • Score:
    • Base: 4.3
    • Temporal: 3.8
  • Severity:
    • Base: Medium
    • Temporal: Low

Code Examples​

Compliant code​

The application does not include any sensitive data in the responses

app.post("/user/generateToken", (req, res) => {
  if user.isLoggedIn{
    let data = {
      userName: req.body.user,
      password: req.body.password,
      ...other user sensitive information
    }
    if(req.body.userCredentials == "ADMIN"){
      res.send(data);
    }
  }
});

Non compliant code​

There is a method in the application that includes sensitive data in the response

app.post("/user/generateToken", (req, res) => {
  let data = {
    userName: req.body.user,
    password: req.body.password,
    ...other user sensitive information
  }
  res.send(data);
});

Requirements​

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