Hello together, as many of you already know some german banks are sharing the same hoster.
Via google dorking it is possible to determine some customers of one of those hosters (Fiducia & GAD IT AG). The hoster uses a GET parameter called „bankid“ to identify its customers. For example: https://mobilebanking.gad.de/inm/mobilgad////ptlweb/WebPortal? <https://mobilebanking.gad.de/inm/mobilgad////ptlweb/WebPortal?bankid=8008>bankid=8008 <https://mobilebanking.gad.de/inm/mobilgad////ptlweb/WebPortal?bankid=8008> With help of google dorking „inurl:WebPortal?bankid=„ it is possible to enumerate all banks which host their online banking service at Fiducia & GAD IT AG. We checked this via whois on the ip net ranges - where another mistake is done - net name „GAD“ in all whois records. Another indicator for a shared environment (at least some shared systems) is changing the banking id shown in the following example: https://www.apobank.de/ptlweb/WebPortal?bankid=8008 <https://www.apobank.de/ptlweb/WebPortal?bankid=8008> changed to: https://www.apobank.de/ptlweb/WebPortal?bankid=8007 <https://www.apobank.de/ptlweb/WebPortal?bankid=8007> redirects to https://www.vr.de/privatkunden.html <https://www.vr.de/privatkunden.html> In Germany and the EU it is given by law that you have to separate clients data because, e.g. EU-DSGVO. For banks especially BAFIN audits this, too. On the following link you’ll find a cleaned list of dork double results, where are around 85 banks are listed with their bankid. https://data.prosec-networks.com/d/7cf20ee4b17e44ccb402/?dl=1 <https://data.prosec-networks.com/d/7cf20ee4b17e44ccb402/?dl=1> In our oppinion the separation is not given properly, what do you guys think about this? Best regards / Mit freundlichen Grüßen Tim Schughart CEO / Geschäftsführer -- ProSec GmbH Robert-Koch-Straße 1-9 56751 Polch Website: https://www.prosec-networks.com Phone: +49 (0)261 450 930 90 Sitz der Gesellschaft / company domiciled in: Polch Registergericht / registry court: Amtsgericht Koblenz, HRB 26457 Geschäftsführer / chief executive: Tim Schughart USt-IdNr./ VAT ID: DE321817516 “This E-Mail communication may contain CONFIDENTIAL, PRIVILEGED and/or LEGALLY PROTECTED information and is intended only for the named recipient(s). Any unauthorized use, dissemination, copying or forwarding is strictly prohibited. If you are not the intended recipient and have received this email communication in error, please notify the sender immediately, delete it and destroy all copies of this E-Mail. “Diese E-Mail Mitteilung kann VERTRAULICHE, dem BERUFSGEHEIMNIS UNTERLIEGENDE und/oder RECHTLICH GESCHÜTZTE Informationen enthalten und ist ausschließlich für den/die genannten Adressaten bestimmt. Jede unbefugte Nutzung, Weitergabe, Vervielfältigung oder Versendung ist strengstens verboten. Sollten Sie nicht der angegebene Adressat sein und diese E-Mail Mitteilung irrtümlich erhalten haben, informieren Sie bitte sofort den Absender, löschen diese E-Mail und vernichten alle Kopien. _______________________________________________ Sent through the Full Disclosure mailing list https://nmap.org/mailman/listinfo/fulldisclosure Web Archives & RSS: http://seclists.org/fulldisclosure/
