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Microsoft Bypasses HOSTS File
whitehatlurker writes "Dave Korn announced on the Full Disclosure and Bugtraq security lists that Microsoft is bypassing local lookups for some hosts, meaning that you can't locally block some sites through your HOSTS file. All of these sites are MicroSoft controlled sites.
The general feeling in the rest of the thread is that this was to obfuscate these hosts and prevent them from being blocked by malware. However, there are no non-MicroSoft hosts listed, giving a competitive advantage for MicroSoft's anti-malware tools over other brands."
I would have thought that if you cant subvert the HOSTS file then all you have to do is to intercept any DNS lookup of these MS addresses and you would have the same effect.
If you are trying to stop MS software from talking to home, then just use an external firewall.
Michael
There is no cryptographic solution to the problem where the intended receiver and the attacker are the same entity.
It helps prevent Malware. Sure, MS might have a slim advantage, but it also prevents otherwise botted PCs from accessing MS Updates against things like Blaster. I don't see this as being such a big deal.
Microsoft could also be using this to prevent users from blocking MSN messenger ad servers.
Why? Maybe someone will get a comment from MS.
The point is that mucking around with the inner workings of the OS is BAD, unless it is documented appropriately. Now, documentation doesn't make it good, but if they're departing from the expected behavior, they should let people know.
[Fuck Beta]
o0t!
The main problem is not that you can't block MS addresses, it is that MS is only preventing their addresses from being blocked. Since they are now getting into the security business, this gives them what could be seen as an unfair advantage.
Let us say that Joe User gets a piece of Malware, so he decides to visit a security company to find a solution to his problem. However, the malware has modified his hosts file to block security company web pages from being accessed, which is extremely typical. Joe User is not experienced enough to even know there is a hosts file that he could change back.
Joe User's first attempt would likely be to norton.com, symantec.com (both go to Symantec's main page), or mcafee.com, since these names are pretty much synonymous with antivirus software. However, all of those are blocked and he can't access them.
However, if he goes to microsoft.com, he can go there since the hosts file is subverted in the OS. Since he can't spend the time to figure out why he can't access the others, he purchases Microsoft's AV solution.
"You spoony bard!" -Tellah
The solution exists. Running as standard user in Windows XP will prevent changes to the hosts file.
If the adware can change your hosts file then this is pretty useless anyway. Now all the software has to do is run a script that does the following
nslookup whatever.microsofts.domains
takes the list of return addresses and
route ADD destination MASK mask INVALID INVALID INVALID foreach
and your traffic to MS wont even leave the network card.
No, no... You just *license* the farm. MS still owns it. For a nominal fee, they'll let you step in the cow pies every second Tuesday.
A court of law has determined that Microsoft is a monopoly. One of the anti-trust regulations specifies that you cannot use your monopoly power to force your way into another market; that was the heart of the conviction against Microsoft in the Netscape case. Microsoft used their monopoly to oust Netscape as the dominant browser by bundling, which is illegal.
Now they are using that same monopoly power to take over the anti-malware market.
I'm rather ambivilent about this. On one hand, it is just one more case of Microsoft waiting for a market to mature, then forcing their way into it. On the other hand, this market wouldn't exist if it wasn't for their own shoddy products, so it's really Microsoft's reponsibility to fix it. However, malware protection software isn't the correct answer, it's just the most expedient, with a potential for additional profit.
All-in-all, it's just Microsoft's usual game: own the system, rig the system, use that to take over another system. Keep secrets, and act all coy when your secrets are discovered.
Microsoft is to software what Budweiser is to beer.
funny, I see write access by root there. And last I checked, when malware *owns* windows, it's local root, which means the permissions you speak of would amount to absolutely nothing... And btw, you can make it read only to normal users, but again, this would accomplish nothing.
Think about it.
Dear Tom,
this is Slashdot and the term "think" does not apply.