JVN#33836375: "Jiyu Kukan Toku-Toku coupon" App vulnerable to improper server certificate verification

“Jiyu Kukan Toku-Toku coupon” App provided by RUNSYSTEM CO.,LTD. is vulnerable to improper server certificate verification (CWE-295).

Impact

A man-in-the-middle attack may allow an attacker to eavesdrop on an encrypted communication.

Solution

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

Apply the workaround
Applying the following workarounds may mitigate the impacts of this vulnerability.

• Use the application while connected to the carrier’s network or a trusted Wi-Fi access point

Products Affected

• Jiyu Kukan Toku-Toku coupon App for iOS versions 3.5.0 and earlier
• Jiyu Kukan Toku-Toku coupon App for Android versions 3.5.0 and earlier