TITLE:
Easy File Sharing Web Server Two Vulnerabilities

SECUNIA ADVISORY ID:
SA19178

VERIFY ADVISORY:
http://secunia.com/advisories/19178/

CRITICAL:
Moderately critical

IMPACT:
Cross Site Scripting, DoS

WHERE:
>From remote

SOFTWARE:
Easy File Sharing Web Server 3.x
http://secunia.com/product/8649/

DESCRIPTION:
Revnic Vasile has reported two vulnerabilities in Easy File Sharing
Web Server, which can be exploited by malicious users to conduct
script insertion attacks and by malicious people to cause a DoS
(Denial of Service).

1) A format-string error exists within the logging functionality when
logging received HTTP requests. This can be exploited to crash the
server via a specially-crafted request.

Example:
http://[host]/%25n

2) Input passed in the Description field when uploading a file or
when creating a folder isn't sanitised before being saved. This can
be exploited to execute arbitrary HTML and script code in a user's
browser session in context of an affected website when a folder
containing malicious file/folder description is viewed.

The vulnerabilities have been confirmed in version 3.2. Other
versions may also be affected.

SOLUTION:
Filter malicious characters and character sequences in a proxy or
firewall with a URL filtering capabilities.

PROVIDED AND/OR DISCOVERED BY:
Revnic Vasile

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