• Automation

    How to generate a random value?

    There are two simple ways to generate a value:

    1. Get the system date time:

    // Get the current date and time from system.
    DateFormat dateFormat = new SimpleDateFormat(“yyyyMMddHHmmss”);
    Calendar cal = Calendar.getInstance();
    String GetDateTime = dateFormat.format(cal.getTime());

    The Result: 20160528010203

    2. Get a random number:

    Random rd = new Random();
    for (int idx = 1000; idx <= 100000; ++idx) {
    randomInt = rd.nextInt(100000);

    The Result: 95018

    Example code in real:

  • Security

    Malicious redirect & bypass “Redirect Notice” at Google.com

    The last few months, when I’m working around with “Open Redirect” vulnerability, I found something interesting that a hacker can bypass confirmation page and redirect the user to the malicious website by using the Google.com domain.

    1. My site: https://sangbui.com
    2. Redirect to other site by using Google.com domain: https://www.google.com/url?sa=t&url=[URL]
    Eg: https://www.google.com/url?sa=t&url=https://sangbui.com

    Display: Redirect Notice

    Redirect Notice - Mozilla Firefox 2016-05-23 23.47.41
    So how can I bypass this form and redirect the user to my page without any confirmation message?

    3. Bypass the confirmation page:  https://www.google.com/url?sa=t&url=[URL]&usg=[Code]*

    * See the below video to know how can I get the Code. The full URL will be:

    With this URL, the hacker can redirect the user to malicious site or phishing.

    I have reported this issue to Google but they think that this is an not a security vulnerability: “Our take on this is that tooltips are not a reliable security indicator, and can be tampered with in many ways; so, we invest in technologies to detect and alert users about phishing and abuse, but we generally hold that a small number of properly monitored redirectors offers fairly clear benefits and poses very little practical risk.”

    In the next email they said that: “We consider this issue as working as intended, but thanks for letting us know”.

    I think the confirmation page “Redirect Notice” should be displayed to help the user know where they are going to. It’s a risk for sometimes.

  • Security

    Text injection on form

    Đây là một lỗi khá thú vị, nó có thể được dùng để khai thác và đánh lừa người dùng (phishing).

    URL: http://ok.ru

    Đầu tiên mình sẽ không nhập Username, Password và bấm Log in thì xuất hiện thông báo lỗi như bên dưới.

    Odnoklassniki - Mozilla Firefox 2016-05-21 23.43.29

    Chú ý lên URL thì thấy có dạng sau:

    Thay đổi dòng “errors.email.empty” bằng một nội dung khác.

    Kết quả.

    Odnoklassniki - Mozilla Firefox 2016-05-21 23.46.32


  • Security

    XSS collection for testing

    This is a list of strings that can be used for XSS testing and bypass filter.