JVN#03447226: "Skylark" App fails to restrict custom URL schemes properly

“Skylark” App provided by SKYLARK HOLDINGS CO., LTD. provides the function to access a requested URL using Custom URL Scheme. The App does not restrict access to the function properly (CWE-939) which may be exploited to direct the App to access any sites.

Impact

An arbitrary site may be displayed on the WebView of the product by using another application installed on the user’s device. As a result, the user may be redirected to a malicious site.

Solution

Update the application
Update the application to the latest version according to the information provided by the developer.

Products Affected

• “Skylark” App for Android versions 6.2.13 and earlier
• “Skylark” App for iOS versions 6.2.13 and earlier