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Cross-Site Request Forgery occurrences in Simatic S7-1500 Software Controller
A vulnerability has been identified in SIMATIC Drive Controller family (All versions < V3.0.1), SIMATIC ET 200S IM151-8 PN/DP CPU (All versions < V3.2.19), SIMATIC ET 200S IM151-8F PN/DP CPU (All versions < V3.2.19), SIMATIC ET 200pro IM154-8 PN/DP CPU (All versions < V3.2.19), SIMATIC ET 200pro IM154-8F PN/DP CPU (All versions < V3.2.19), SIMATIC ET 200pro IM154-8FX PN/DP CPU (All versions < V3.2.19), SIMATIC PC Station (All versions >= V2.1), SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (All versions < V4.6.0), SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions < V3.0.1), SIMATIC S7-1500 Software Controller (All versions), SIMATIC S7-300 CPU 314C-2 PN/DP (All versions < V3.3.19), SIMATIC S7-300 CPU 315-2 PN/DP (All versions < V3.2.19), SIMATIC S7-300 CPU 315F-2 PN/DP (All versions < V3.2.19), SIMATIC S7-300 CPU 315T-3 PN/DP (All versions < V3.2.19), SIMATIC S7-300 CPU 317-2 PN/DP (All versions < V3.2.19), SIMATIC S7-300 CPU 317F-2 PN/DP (All versions < V3.2.19), SIMATIC S7-300 CPU 317T-3 PN/DP (All versions < V3.2.19), SIMATIC S7-300 CPU 317TF-3 PN/DP (All versions < V3.2.19), SIMATIC S7-300 CPU 319-3 PN/DP (All versions < V3.2.19), SIMATIC S7-300 CPU 319F-3 PN/DP (All versions < V3.2.19), SIMATIC S7-400 PN/DP V6 CPU family (incl. SIPLUS variants) (All versions), SIMATIC S7-400 PN/DP V7 CPU family (incl. SIPLUS variants) (All versions), SIMATIC S7-PLCSIM Advanced (All versions < V5.0), SIMATIC WinCC Runtime Advanced (All versions), SINUMERIK ONE (All versions), SIPLUS ET 200S IM151-8 PN/DP CPU (All versions < V3.2.19), SIPLUS ET 200S IM151-8F PN/DP CPU (All versions < V3.2.19), SIPLUS S7-300 CPU 314C-2 PN/DP (All versions < V3.3.19), SIPLUS S7-300 CPU 315-2 PN/DP (All versions < V3.2.19), SIPLUS S7-300 CPU 315F-2 PN/DP (All versions < V3.2.19), SIPLUS S7-300 CPU 317-2 PN/DP (All versions < V3.2.19), SIPLUS S7-300 CPU 317F-2 PN/DP (All versions < V3.2.19). The login endpoint /FormLogin in affected web services does not apply proper origin checking. This could allow authenticated remote attackers to track the activities of other users via a login cross-site request forgery attack. (2022-11-08, CVE-2022-30694)
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.