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Cross-site Scripting occurrences in Daloradius
daloRADIUS is an open source RADIUS web management application. daloRadius 1.3 and prior are vulnerable to a combination cross site scripting (XSS) and cross site request forgery (CSRF) vulnerability which leads to account takeover in the mng-del.php file because of an unescaped variable reflected in the DOM on line 116. This issue has been addressed in commit `ec3b4a419e`. Users are advised to manually apply the commit in order to mitigate this issue. Users may also mitigate this issue with in two parts 1) The CSRF vulnerability can be mitigated by making the daloRadius session cookie to samesite=Lax or by the implimentation of a CSRF token in all forms. 2) The XSS vulnerability may be mitigated by escaping it or by introducing a Content-Security policy. (2022-12-06, CVE-2022-23475)
Why Cross-site Scripting can be dangerous
Cross site scripting is an attack where a web page executes code that is injected by an adversary. It usually appears, when users input is presented. This attack can be used to impersonate a user, take over control of the session, or even steal API keys.
The attack can be executed e.g. when you application injects the request parameter directly into the HTML code of the page returned to the user:
https://server.com/confirmation?message=Transaction+Complete
what results in:
<span>Confirmation: Transaction Complete</span>
In that case the message can be modified to become a valid Javascript code, e.g.:
https://server.com/confirmation?message=<script>dangerous javascript code here</script>
and it will be executed locally by the user's browser with full access to the user's personal application/browser data:
<span>Confirmation: <script>dangerous javascript code here</script></span>