TITLE:
Xerver Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA17243

VERIFY ADVISORY:
http://secunia.com/advisories/17243/

CRITICAL:
Moderately critical

IMPACT:
Cross Site Scripting, Exposure of system information, Exposure of
sensitive information

WHERE:
>From remote

SOFTWARE:
Xerver 4.x
http://secunia.com/product/5944/

DESCRIPTION:
Ziv Kamir has reported some vulnerabilities in Xerver, which can be
exploited by malicious people to conduct cross-site scripting
attacks, and disclose system and sensitive information.

1) The problem is that it is possible to disclose the source code of
script files by appending a dot to the filename in a HTTP request.

Example:
http://[host]/script.pl.

2) The problem is that the content of a directory can be disclosed
even when there is an index file by appending a null character to the
path in a HTTP request.

Example:
http://[host]/%00/

This can further be exploited to execute arbitrary HTML and script
code in a user's browser session in context of an affected site via a
specially crafted path.

Example:
http://[host]/%00/[code]

The vulnerabilities have been reported in version 4.17. Other
versions may also be affected.

SOLUTION:
Update to version 4.20.
http://www.javascript.nu/xerver/

PROVIDED AND/OR DISCOVERED BY:
Ziv Kamir, Global Security Solution IT

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