This article is a part of our Vulnerability Database (back to index)
Cross-Site Request Forgery occurrences in Monorail
Google Monorail before 2018-04-04 has a Cross-Site Search (XS-Search) vulnerability because CSV downloads are affected by CSRF, and calculations of download times (for requests with duplicated columns) can be used to obtain sensitive information about the content of bug reports. (2018-11-20, CVE-2018-10099)
Google Monorail before 2018-05-04 has a Cross-Site Search (XS-Search) vulnerability because CSV downloads are affected by CSRF, and calculations of download times (for requests with an unsupported axis) can be used to obtain sensitive information about the content of bug reports. (2018-11-20, CVE-2018-19334)
Google Monorail before 2018-06-07 has a Cross-Site Search (XS-Search) vulnerability because CSV downloads are affected by CSRF, and calculations of download times (for requests with a crafted groupby value) can be used to obtain sensitive information about the content of bug reports. (2018-11-20, CVE-2018-19335)
Why Cross-Site Request Forgery can be dangerous
The absence of Anti-CSRF tokens may lead to a Cross-Site Request Forgery attack that can result in executing a specific application action as another logged in user, e.g. steal their account by changing their email and password or silently adding a new admin user account when executed from the administrator account.
The attacker may copy one of your web application forms, e.g. email/password change form.
The webpage will contain a form with the exact set of fields as the original application but with input values already provided and the submit button replaced with a Javascript code causing auto-submission. When the page is accessed the form will be immediately submitted and page contents replaced with a valid content or a redirect to your original application.
One of your application users who is already logged in can be then tricked to navigate to such malicious page e.g. by clicking a link in a phishing email, and the pre-populated form content will be submitted to your application like it would be submitted by your user.