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When internal hostnames are leaked to the clown

rachelbythebay.com

41–50 of 265 posts

Re: When internal hostnames are leaked to the clown

#41

Not sure why they made the connection to sentry.io and not with CT logs. My first thought was that "*.some-subdomain." got added to the CT logs and someone is scanning *. with well known hosts, of which "nas" would be one. Curious if they have more insights into sentry.io leaking and where does it leak to...

But she mentioned: 1) it isn't in DNS only /etc/hosts and 2) they are making a connection to it. So they'd need to get the IP address to connect to from somewhere as well.

Re: When internal hostnames are leaked to the clown

#42
This is actually an really interesting way to attack a sensitive network. This is a way of allowing to map the internal network of a sensitive network. Getting access is obviously the main challenge but once you're in there you need to know where you go and what to look for. If you've already got that knowledge when planning the attack to gain entry then you've got the upper-hand. So while it kinda seems like "Ok, so they have a hostname they can't access why do I care?". If you're doing high-end security on your system admin level then this is the sort of small nitpicking that it takes to be the best.

Re: When internal hostnames are leaked to the clown

#43
post #17

>Hope you didn't name it anything sensitive, like "mycorp-and-othercorp-planned-merger-storage", or something. So, no one competent is going to do this, domains are not encrypted by HTTPS, any sensitive info is pushed to the URL Path. I think being controlling of domain names is a sign of a good sysadmin, it's also a bit schizophrenic, but you gotta be a little schizophrenic to be the type of sysadmin that never gets…

Obl. nitpick: you mean paranoia, presumably. Schizophrenia is a dissociative/psychotic disorder, paranoia is the irrational belief that you’re being persecuted/watched/etc.

Btw, in this case it can’t be paranoia since the belief was not irrational - the author was being watched.

Re: When internal hostnames are leaked to the clown

#45
post #43
post #17

>Hope you didn't name it anything sensitive, like "mycorp-and-othercorp-planned-merger-storage", or something. So, no one competent is going to do this, domains are not encrypted by HTTPS, any sensitive info is pushed to the URL Path. I think being controlling of domain names is a sign of a good sysadmin, it's also a bit schizophrenic, but you gotta be a little schizophrenic to be the type of sysadmin that never gets…

Obl. nitpick: you mean paranoia, presumably. Schizophrenia is a dissociative/psychotic disorder, paranoia is the irrational belief that you’re being persecuted/watched/etc. Btw, in this case it can’t be paranoia since the belief was not irrational - the author was being watched.

You are right, I meant paranoid.

>Btw, in this case it can’t be paranoia since the belief was not irrational - the author was being watched.

Yes, but I mean being overly cautious in the threat model. For example, birds may be watching through my window, it's true and I might catch a bird watching my house, but it's paranoid in the sense that it's too tight of a threat model.

Re: When internal hostnames are leaked to the clown

#46
post #23

I think people are misunderstanding. This isn't CT logs, its a wildcard certificate so it wouldn't leak the "nas" part. It's sentry catching client-side traces and calling home with them, and then picking out the hostname from the request that sent them (ie, "nas.nothing-special.whatever.example.com") and trying to poll it for whatever reason, which is going to a separate server that is catching the wildcard domain a…

My first thought was perhaps they're trying to fetch a favicon for rendering against the traces in the UI?

They're likely trying to retrieve source maps

Re: When internal hostnames are leaked to the clown

#47
post #26
post #17

>Hope you didn't name it anything sensitive, like "mycorp-and-othercorp-planned-merger-storage", or something. So, no one competent is going to do this, domains are not encrypted by HTTPS, any sensitive info is pushed to the URL Path. I think being controlling of domain names is a sign of a good sysadmin, it's also a bit schizophrenic, but you gotta be a little schizophrenic to be the type of sysadmin that never gets…

> any sensitive info is pushed to the URL Path This too is not ideal. It gets saved in the browser history, and if the url is sent by message (email or IM), the provider may visit it. > Definitely uninstall whatever junk leaked your domain though, but it's really nothing. We are used to the tracking being everywhere but it is scandalous and should be considered as such. Not the subdomain leak part, that's just how Ra…

>This too is not ideal. It gets saved in the browser history, and if the url is sent by message (email or IM), the provider may visit it.

Sure. POST for extra security.

> Not the subdomain leak part, that's just how Rachel noticed, but the non advertised tracking from an appliance chosen to be connected privately.

If this were a completely local product, like say a USB stick. Sure. but this is a Network Attached Storage product, and the user explicitly chose to use network functions (domains, http), it's not the same category of issue.

Re: When internal hostnames are leaked to the clown

#48
post #45
post #43

Earlier quoted context omitted.

Obl. nitpick: you mean paranoia, presumably. Schizophrenia is a dissociative/psychotic disorder, paranoia is the irrational belief that you’re being persecuted/watched/etc. Btw, in this case it can’t be paranoia since the belief was not irrational - the author was being watched.

You are right, I meant paranoid. >Btw, in this case it can’t be paranoia since the belief was not irrational - the author was being watched. Yes, but I mean being overly cautious in the threat model. For example, birds may be watching through my window, it's true and I might catch a bird watching my house, but it's paranoid in the sense that it's too tight of a threat model.

I know analogies are not meant to be perfect, but birds don't mass watch, and don't systematically watch every of your moves neither.

Re: When internal hostnames are leaked to the clown

#49
post #19

Earlier quoted context omitted.

> Is "clown GCP Host" a technical term I am unaware of, or is the author just voicing their discontent? Clown is Rachel's word for (Big Tech's) cloud.

She was (or is) at Facebook, and "clowntown" and "clowny" are words you see there.

> She was (or is) at Facebook

was (and she worked at Google too)

> "clowntown" and "clowny" are words you see there.

Didn't know this, interesting!

Re: When internal hostnames are leaked to the clown

#50

Oh god this sucks, i've been setting up lots of services on my NAS pointing to my own domains recently. Can't even name the domains on my own damn server with an expectation of privacy now.

> Can't even name the domains on my own damn server with an expectation of privacy now.

You never could. A host name or a domain is bound to leave your box, it's meant to. It takes sending an email with a local email client.

(Not saying, the NAS leak still sucks)

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