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Insecure service configuration - Webview

Description​

The application enables the use of JavaScript through the method setJavaScriptEnabled which is disabled by default. This practice increases the chances for an attacker to exploit XSS vulnerabilities.

Impact​

Obtain or edit information using XSS vulnerabilities.

Recommendation​

  • Unless required otherwise the application must not allow the use of JavaScript.
  • If the use of JavaScript is enabled, implement content and length validations in all the input fields.

Threat​

Anonymous attacker from the Internet.

Expected Remediation Time​

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

Temporal​

  • Exploit code madurity: P
  • Remediation level: U
  • Report confidence: R

Result​

  • Vector string: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N/E:P/RL:U/RC:R
  • Score:
    • Base: 4.8
    • Temporal: 4.4
  • Severity:
    • Base: Medium
    • Temporal: Medium

Code Examples​

Compliant code​

The application does not enable the insecure setJavaScriptEnabled method

@Override
protected void processLogic(Bundle savedInstanceState) {
  mContentWv.getSettings().setJavaScriptEnabled(false);
  mContentWv.loadUrl("my_url");
}

Non compliant code​

The application uses the insecure setJavaScriptEnabled method

@Override
protected void processLogic(Bundle savedInstanceState) {
  mContentWv.getSettings().setJavaScriptEnabled(true);
  mContentWv.loadUrl("my_url");
}

Requirements​

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