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securityvulnsSecurityvulnsSECURITYVULNS:DOC:21937
HistoryJun 02, 2009 - 12:00 a.m.

ASMAX AR 804 gu Web Management Console Arbitrary Shell Command Injection Vulnerability

2009-06-0200:00:00
vulners.com
52
  1. ASMAX 804 gu router is a SOHO class device. It provides ADSL / WiFi / Ethernet interfaces.

  2. There is an unauthenticated maintenance script (named 'script') in /cgi-bin/ directory of the web management
    interface.

  3. When 'system' paramether is passed to the script it allows running OS shell commands (as root).

  4. PoC:
    GET request to:
    http://192.168.1.1/cgi-bin/script?system%20whoami

Returns:
root

  1. Using CSRF attack one could remotely own a router using for example simple <img> html tags pointing to
    http://192.168.1.1/

  2. The issue was tested on firmware: 66.34.1

  3. The vendor was notified on 30.12.08, but we got no reasonable response till now (the bug remains unpatched).

  4. More information: http://www.securitum.pl/dh/asmax-ar-804-gu-compromise