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Account lockout

Description​

It is possible to cause account lockouts, effectively blocking users from accessing the system.

Impact​

Avoid the access of valid users to the application.

Recommendation​

Avoid blocking users accounts as a mechanism of protection, make it more restrictive or control it to prevent an exploitation by attackers.

Threat​

Anonymous attacker from the Internet.

Expected Remediation Time​

⌚ 30 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: N
  • User interaction: N
  • Scope: U
  • Confidentiality: N
  • Integrity: N
  • Availability: L

Temporal​

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

Result​

  • Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:X/RC:X
  • Score:
    • Base: 5.3
    • Temporal: 5.3
  • Severity:
    • Base: Medium
    • Temporal: Medium

Code Examples​

Compliant code​

The application performs automatic password change instead of blocking user accounts

app.use((req, res, next) => {
  const userId = req.params.userId;
  const password = req.params.password;
  if(isValidUser(userId, password)){
    //Code to handle login
  } else if(getUserLoginAttempts(userId)>5){
    sendPasswordChange(userId);
    res.redirect("/login");
  }
})

Non compliant code​

The application has a functionality to block user accounts based on number of login tries

app.use((req, res, next) => {
  const userId = req.params.userId;
  const password = req.params.password;
  if(isValidUser(userId, password)){
    //Code to handle login
  } else if(getUserLoginAttempts(userId)>5){
    blockUser(userId);
  }
})

Requirements​

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