[SA34275] ZyXEL G-570S Multiple Vulnerabilities

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TITLE:
ZyXEL G-570S Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA34275

VERIFY ADVISORY:
http://secunia.com/advisories/34275/

DESCRIPTION:
Michael Schratt has reported some vulnerabilities in ZyXEL G570S,
which can be exploited by malicious people to disclose sensitive
information, bypass certain security restrictions, or cause a DoS
(Denial of Service).

1) An error in the embedded web server when processing HTTP requests
can potentially be exploited to cause a DoS by e.g. sending a
specially crafted HTTP request containing overly long parameters or a
HTTP requests without headers to the device.

2) An error in the embedded web server can be exploited to change
certain configuration settings (e.g. the hostname) by sending a
specially crafted HTTP request to the device.

3) The configuration file can be obtained by accessing
"/cgi-bin/ExportCurrentSettings?exportsetting=1".

SOLUTION:
The vulnerability are reportedly fixed in firmware version
G-570Sv2_V1.00 (ZS.3) B4.

PROVIDED AND/OR DISCOVERED BY:
Michael Schratt

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