Microhard Systems 3G/4G Cellular Ethernet And Serial Gateway Open Redirect

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Microhard Systems 3G/4G Cellular Ethernet and Serial Gateway Open Redirect  
  
  
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: Input passed via the 'prev' GET parameter in 'config.sh' script is not properly  
verified before being used to redirect users. This can be exploited to redirect a user  
to an arbitrary website e.g. when a user clicks a specially crafted link to the affected  
script hosted on a trusted domain.  
  
=========================================================================================  
/www/cgi-bin/webif/config.sh:  
-----------------------------  
  
1: #!/usr/bin/webif-page  
2: <?  
3: . /usr/lib/webif/webif.sh  
4: #sleep 3  
5: update_changes  
6:  
7: if [ "$FORM_mode" != "clear" ]; then  
8: case "$CHANGES" in  
9: ""|0)FORM_mode=nochange  
10: esac  
11: fi  
12: case "$FORM_mode" in  
13: nochange) header "$FORM_cat" "" "@TR<<No config change.|No configuration changes were made.>>"  
14: echo "${FORM_prev:+<meta http-equiv=\"refresh\" content=\"2; URL=$FORM_prev\" />}"  
15: ;;  
16: clear)  
17: rm -r /tmp/.webif/* >&- 2>&-  
18: rm /tmp/.uci/* >&- 2>&-  
19: header "$FORM_cat" "" "@TR<<Config discarded.|Your configuration changes have been discarded.>>"  
20: CHANGES=""  
21: echo "${FORM_prev:+<meta http-equiv=\"refresh\" content=\"1; URL=$FORM_prev\" />}"  
22: ;;  
...  
...  
  
=========================================================================================  
  
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-2018-5483  
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2018-5483.php  
  
  
13.03.2018  
  
--  
  
  
http://192.168.1.1:8080/cgi-bin/webif/config.sh?mode=clear&cat=Tools&prev=https://www.zeroscience.mk  
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