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by goldpizza44 725 days ago
Interesting site on hsts.

I don't think HSTS will help if he is running his own WWW site on his laptop with a proper CA signed cert. If I understand correctly his laptop was presenting a proper WWW login page presumably over HTTPS after victims connected to his WIFI. What he was probably faking was the redirect to the Identity Provider (IDP) by staying on his own properly credentialed HTTPS site which would pass all HSTS checks. He may have also been faking DNS responses to keep users where he wants them.
2 comments
willhackett 725 days ago
Exactly this. Apple devices in fact use a domain https://captive.apple.com/ to detect when to redirect to a captive portal which will grant the user access to the internet. HTTPS isn't used here because the captive experience is to re-write all DNS lookups to a local IP to serve the captive experience.

This experience would just redirect the user to a site they've never been to before, say: wa-man-likes-your-data.com. This could have a legitimate signed cert from anywhere and look legitimate to the device with a lock icon. Put the airline's logo and a form for PII, wait a couple of hours and you've collected a plane load of data.

I used to think about doing something similar but as an education campaign. Similar to Phishing Simulators at large corporates, I had the idea to display a captive page that explained what the user did and how they can learn to avoid it in future.

Apple & Google should really make it clearer on phones that users are joining untrusted networks, especially any network not implementing Wi-Fi Certified Passpoint (Hotspot 2.0).

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omegabravo 725 days ago
as I understand it, it would be http://captive.apple.com

so that the captive portal can intercept and write their own login.

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willhackett 725 days ago
Yes, my brain auto-corrected me to HTTPS.
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omegabravo 725 days ago
How would they have got a proper CA signed cert for a domain they don't own?

HSTS will only make a HTTPS connection. Without the valid certificate, they should get a warning.

The only way this "works" is if a captive portal pops up a browser to a site that looks the same like amaz0n.com. Password manager wouldn't popup, but many people don't use them.

Faking DNS also won't help with the TLS warning, they won't have the certificate.

Basically, this shouldn't be possible with HSTS.

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rahimnathwani 725 days ago
> How would they have got a proper CA signed cert for a domain they don't own?

No need. People probably don't look closely at the domain name.

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