Hacker News Reader

xianbon Ask HN: Does Uber Eats take a loss when they offer their coupons?

I'd assume it's similar to what grubhub said here that the platform pays

https://twitter.com/grubhub/status/611320394256109568?lang=e...

xianbon Auth0 JWT Auth Bypass: Case-Sensitive Blacklisting Is Harmful

It's fascinating how Auth0 actually had a blog post about finding and fixing a handful of JWT vulnerabilities years ago (one of them is more advanced to exploit than this). Just another example of why you always have to be vigilant and that properly implementing encryption/security is hard

https://auth0.com/blog/critical-vulnerabilities-in-json-web-...

xianbon U.K. Lawmakers accuse Facebook's CEO of leadership failure

probably need to be fined billions to get them to take it seriously

xianbon Gmail spam-filters PayPal security messages

Houzz and Nest security emails also got filtered

xianbon Google has quietly dropped ban on personally identifiable web tracking (2016)

I think it's not just the journalists though...pretty sure some of the concerns with FB were published years ago but fell on mostly deaf ears. But now you have a public that cares more due to some "big revelations" and also a press he'll-bent on furthering the anti-SV tracking narrative

xianbon I exploited TLS-SNI-01 issuing Let's Encrypt SSL-certs for any domain (2018)

> Why would LE send the SNI in the first place? I thought the purpose was to prove you own the domain, not cohabit an environment where the domain is hosted?

The assumption was that you controlled the domain if you could return the self-signed cert with subjectAlt=foo.bar.acme.invalid when the SNI request for foo.bar.acme.invalid is made to the server your are requesting a cert for. Unfortunately the assumption didn't hold up because hosting providers shared the same routing server across domains and subdomains and those routing servers did not have controls around the subjectAlt domains used for TLS-SNI-01.

> Also, what do host headers have to do with this? Presumably this is just a tls handshake test? They don't have anything to do with the weakness. It's mentioned to make the distinction that SNI is used for the cert retrieval to establish the connection and Host-header is used separately to route to the proper backend

xianbon Hacking of artificial intelligence is an emerging security crisis

For ETH the big one is the DAO where they had to fork it to recover

There's also other smaller bugs like coinbase and parity wallet

xianbon PagerDuty Files Confidentially for IPO

Perhaps this might be a poor setup on my company's part, but it's awful navigating between teams and finding escalation policies and schedules in PD

xianbon Button offers instant gratification for those plagued by airplane noise

> The green lines are flight paths from before the implementation of the new technology (January 2013). The red lines are flight paths from after the implementation of the new technology (January 2015).

xianbon Amazon is selling stolen art, fake products and is infringing copyrights

sounds like a nice generic company value/principle

xianbon Amazon’s Grocery Push Keeps Stumbling After Whole Foods Purchase

is it really different from the data collection of other grocery store shopper cards though?

xianbon Chat app fined for plaintext passwords under GDPR

if you store plaintext password on the client, you'd be one XSS attack away from potentially having a lot of passwords stolen - best practice is to have password in plaintext for a little as possible (there's some research on not transmitting the password at all but I don't think there's anything widely accepted like bcrypt is for password hashing https://en.wikipedia.org/wiki/Zero-knowledge_password_proof)

xianbon Chat app fined for plaintext passwords under GDPR

anything that makes computation less intensive for you also makes it less intensive for a potential malefactor - it's just an inherent tradeoff.

Rather than scan for password being contained in the message, something more reasonable to try would be to check if the whole message is the password since you can just plug that into the normal password hasher and run just one slower hash op

xianbon LinkedIn violated data protection by using 18M email addresses of non-members

accurate description of LinkedIn by Blake Lively and Anna Kendrick https://youtu.be/xmo8-Bh98fw?t=270

xianbon Blue Apron lays off more workers

but you can also choose to withhold stock for taxes

basically would have just been a losing gamble to have withheld money instead instead of it being something forced upon them

xianbon Former Groupon CEO Andrew Mason on what the roller-coaster ride felt like

https://twitter.com/kenjennings/status/339170784406810624

xianbon Sales engagement startup Apollo says its massive contacts database was stolen

yeah, if you're absolutely inept and have insufficient logging/monitoring, you can't even tell how bad you'd been screwed. kinda like a Dunning Kruger effect of sorts

xianbon Facebook Network Breach Impacts Up to 50M Users

sounded like the video stuff was added after view as was added so it probably didn't go through the same level of scrutiny

xianbon A Cardiologists Concerns with the New Apple Watch

sounds similar to this https://en.wikipedia.org/wiki/False_positive_paradox

xianbon Google’s first all-hands after 2016 election [video]

https://www.youtube.com/watch?v=E5gPdrlyc84

people have, but who knows how long it'll last

xianbon Blocklist Facebook domains

It's running fine for me on a Pi Zero W. There's honestly like no slowdown at all

xianbon Etsy stock has lost 76% of its value in 9 months

>profit on them. Nope. http://gawker.com/here-are-the-internal-documents-that-prove...

Granted that businesses like Amazon are unprofitable, but Uber is not nearly going to be as stable