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Duplicate code

Description​

The application's source code has duplicate code, which may cause unexpected behaviors.

Impact​

  • Reduce the maintainability of the code.
  • Facilitate the propagation of errors if the duplicate code contains any vulnerability.

Recommendation​

Ensure that source code does not have classes, functions or repeated methods.

Threat​

Authenticated attacker from the Internet.

Expected Remediation Time​

⌚ 15 minutes.

Score​

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

Base​

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

Temporal​

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

Result​

  • Vector string: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L/E:U/RL:X/RC:X
  • Score:
    • Base: 3.1
    • Temporal: 2.9
  • Severity:
    • Base: Low
    • Temporal: Low

Code Examples​

Compliant code​

There is no commented out code in the production environment

app.post("/register", function (req, res) {
  var username = req.body.username
  var password = req.body.password
  User.register(new User({ username: username }),
      password, function (err, user) {
    if (err) {
      return res.render("register");
    }
  });
});

Non compliant code​

There is duplicate code with the same functionality in a production stage

app.post("/register", function (req, res) {
  var username = req.body.username
  var password = req.body.password
  User.register(new User({ username: username }),
      password, function (err, user) {
    if (err) {
      return res.render("register");
    }
  });
});
app.post("/register", function (req, res) {
  var username = req.body.username
  var password = req.body.password
  User.register(new User({ username: username }),
      password, function (err, user) {
    if (err) {
      return res.render("register");
    }
  });
});

Requirements​

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