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Googling Your Way Into Hacking
knifee writes "New scientist is running an article explaining how hackers can use Google's cache to quickly hunt down sensitive pages, for example, by searching the terms "bash history", "temporary" and "password".
Might be worth looking at this tutorial about robots.txt if you think you might be at risk." That's pretty amusing.
For example, one common filename for passwords is "bash history".
/dev/null, just out of habit. The security problem isn't google's fault, it is stupid admin's who don't know what they are doing.
This guy is a security consultant? Come on, what admin in their right mind would enter a password in cleartext on the command line and allow it to be stored in ~/.bash_history? The first thing I do when I log onto a box is link bash_history to
Visualize the world of wine
google
Google can be used to illegaly hack into computers (possibly stealing copyrighted information). Google must be shut down and all of its users owe us lots of money.
if(!cool) exit(-1);
Damn script kiddies.
They should mention that disallowing a URI in robots.txt tells crackers which URIs on your site have sensitive information. What I do is create a top-level /unpub/ URI, and everything sensitive goes underneath it with hard-to-guess names. In robots.txt I disallow /unpub only.
You're kidding right? Putting stuff in robots.txt is the best way to *guarantee* that robots will go specifically for the file/directories you choose to deny.
Don't be naive about robots.txt... expect to have to do some relatively fancy hacking to actually enforce it.
(Please browse at -1 to read this comment.)
Robots.txt only makes well-behaved search engines not index certain portions of your site. You're still going to be vulnerable until you take the sensitive pages off-line completely. But even then, if a passwords list has been indexed by Google, updating your robots.txt file won't remove it from Google's cache until Google spiders your site again. At which time, Google will discover the passwords list doesn't exist and remove it from the cache.
At least that's how it should work. Is anyone aware of Google requesting robots.txt more often than they spider pages? And then proactively removing pages from their cache based on new robots.txt entries?
While the article deals with Google specifically, lots of non-well-behaved spiders go through common locations looking for password files regardless of what you've blocked out with robots.txt. The only way to completely protect your data is to remove it from your site.
my blog
Having a robots.txt is a good idea but it always amuses me when web sites use robots.txt to list all the areas of their site that they don't what people to look at. When robots.txt contains entries like "Disallow: /admin.asp" or "Disallow: /backdoor.asp" it stops being a way of controlling search engines and becomes a site map of all the places hackers might be interested in.
A friend of mine actually used this to steal ICQ numbers. He wrote a perl script wich googles from "00000001.idx 00000001.dat" to "99999999.idx 99999999.dat" and spits out the result links to a textfile if it gets a full match.
;)
The ICQ password is stored in one of those two datafiles and there are dozend of free decrypt programms for that out there.
But if you think about it... how or why does someone put his ICQ directory on a webserver?!
On the other hand... some people are hosting pr0n sites and dont even know about it
--
One by one the penguins steal my sanity...
So if I forgot my password, google can just tell me what it is? Can it tell me my credit card number too?
- mpg
- mov
- mp3
- secret - doesn't have to be file extensions...
- "My Documents" - yeah, that's secure...
- etc
Anyway, as you can see, it's pretty effective. Sometimes admins wise up, and all you have is the Google cache. But sometimes they don't, and you get to look. Thanks Google!A programmer is a machine for converting coffee into code.
Shouldn't that be bash_history, passwd and tmp?
Was this written down by a non-techie from an audio interview?
Regards,
--
*Art
It's supposed to be used to tell bots not to access some parts of your site due to other reasons.
Common reasons would be that you host a site with a forum on a DSL line and don't want google to index all 5000 threads on it. It's also good for dynamic pages, for example it makes no sense to index a generated page that will be out of date tomorrow. It'll be much better to let it index the archive instead.
Using this for security is just stupid though, as it'd contain a list of vulnerable places. Maybe it will make harder for people to find your vulnerabilities from google, but it will help a lot whoever wants to attack you specifically.
Security problems have to be fixed by setting proper permissions and keeping your server up to date, and not by relying on that every spider that comes to your site will be polite enough to follow robots.txt
I have seen more phpmyadmin pages wide open on google that anything else.. Not putting things like that under htaccess at least is pure laziness and stupidity.
Also it seems people put mysql dumps on their webservers as well..
search for ' "SELECT * FROM credit" + "###" ' and you will see.
This has been going on since google introduced the site cache.
anime+manga together at last.. in real time.
Long says an obvious combination of search terms would include the terms "bash history", "temporary" and "password".
Hmph. When I searched for those phrases at Google, all I got were a bunch of Linux technical how-tos and code samples. If this guy wants to teach us how to be hackers using Google, he's going to have to be more helpful than that!
I regarding the ability to use Google as a warez search machine. The article was about Google censorship and the one response to my post pinpointed almost exactly the point that I brought up, which is the point discussed in this article.
Google has a nice long list of directory lists containing warez (remember the days of l33t FTP searching for filenames? Google for something like, in my last article: "xwin32*.exe * * * * *" "listing of"), serial numbers (Oh, I've found XP's serial number several times in Google's cache) and other "sensitive" information. My question is if other commercial sites are being constantly shut down due to these links (intentional or not), why aren't people targeting Google as well?
In fact, if I'm *cough*too cheap to buy software*cough* or just want to evaluate some crippleware or such before I buy it, I often skip astalavista and cracks.am and just Google it up. Saves me the porn and pop ups, and I don't have to cripple my browser for this (yes I know it's possible to do in other ways, yes I enjoy javascript, no thanks, I don't want comments about how I'm retarded because I don't do it the right way).
This is similar for sites such as the Internet Archive's Wayback Machine that contains other sensitive information.
Because of the academic merit of both of these search mechanisms, I doubt either one will be shut down. Indeed, I highly doubt restrictions will be placed. They're valuable tools for finding more valuable tools. For more information about this sort of stuff, I suggest searching on Fravia+'s web-searching lore. Other information on there relates to "reality cracking", reverse engineering, and other taboo topics. Google's got it all cached. Interested? Just search for (insert topic here) site:searchlores.org.
Sometimes I don't think the comparison of Google to God is that far off. Pardon my heresy.
Kind regards, Devon H. O'Dell
I honestly know of nobody else who uses this technique, I just figured I would try it back when I was hunting down upgrades for old games like Quake 2 while places like FilePlanet were getting hammered:
At google, type "index of", followed by the precise name of the file you are looking for.
I'd say this gives me good results on a fast server 95% of the time.
But the third link down gives us this-3 2marEJ: www.necmitsubishi.com/markets-solutions/government /necfiles/Chicago911.doc+%22do+not+distribute%22+p assword&hl=en&ie=UTF-8
http://216.239.57.104/search?q=cache:p5ouM
Which at the bottom of the document has-
Editors Note:
Product photography is available at http://www.liska.com/necmit.
Username: necmit
Password: monitors
Which seems to prove the point of the search...
No unauthorized use. Trespassers will be shot. Survivors will be shot again.
I guess I don't have the patience to be a real hacker.
Computers are useless. They can only give you answers.
-- Pablo Picasso
Google uses operating systems! All your code are belong to us! Google must be shut down and all of its users owe us lots of money.
You can probably use this to set up "honeypots" which may be legal in States where traditional fake services would be considered illegal as entrapment.
Simply set up a virtual machine (user-mode linux is a good one for this). Have the root account publicly read/write and somehow "accidently" visible to httpd.
Have the login shell a program which acts as your honeypot, logging activity, tracing back to the user, etc. All the stuff honeypots do so well.
Next is to ensure that the root password is visible, plain-text, and in a file that is visible to search engines. Your average skript kiddie is not going to question the apparent generosity of the admin. To get the engine to find the account, you probably want to have your main web page link into your virtual machine's root account - say via an FTP.
Now, none of this is entrapment, in the sense that the person must pro-actively attempt to present a false identity before the service is accessed. There can be no question that the identity of any user logging in is fake, that the user logging in knows that it is fake, and that there has been a deliberate, pre-meditated attempt to compromise an account.
If you want to go one step further, have the login shell transfer some goodies, such as cpuburn. Now, these have to have a "legit" use by a "legit" user, as anyone who gets burned is likely to complain. You have to be able to stand your ground and say "hey, I use this service as a convenient way to do hardware tests on remote machines - I locked that account against intruders, so if an intruder gets in, it's not my fault if they get burned."
(If you leave something dangerous "just lying around", you could probably be held accountable if someone gets hurt, even if they were stupid or malicious. But if you make a "reasonable" attempt to deny access, then it's not your problem.)
In fact, if you do any freelance tech stuff, you might very well use the service for real as a way of fetching over stress-testing software. It would make it a lot harder for "victims" of your root snare to complain, as you could then prove a legitamate use by legitamate users - the victim not being one of them.
It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
Probably not, but his statement of the situation squares with my experience when I talked to an FBI agent after having discovered (and logged) some IRC kiddies who were constructing a DDOS network out of sub7-infected machines.
I'd created a sub7 honeypot on my linux box with a little perl script; after that collected the IRC server ip and channel name, I connected with a random username (pretending to be a bot) and just logged the conversation.
The FBI agent interviewed me very carefully to make certain that my setting up monitoring, etc., was not in any way instigated by a law enforcement officer. (No, I'd just gotten annoyed at random SYN packets) Then, he had no trouble with it. I don't know if this makes the evidence I provided useable legally, but it never came to that. As he explained it, the question was whether I was acting as an agent of the state when setting up the honeypot. Committing entrapment is not anything that non-state actors ever need worry about.
Not that this lets you off the hook entirely - there may be charges of wiretapping involved; monitoring your own machine should be safe legal ground, but connecting to the IRC network (as I did) is a slight bit more dicey legally, and shouldn't be done if you have any reason to believe that the relevant prosecutor would like to hang something on you as well.