TITLE:
PHP Web Statistik Multiple Vulnerabilities and Security Issue

SECUNIA ADVISORY ID:
SA17789

VERIFY ADVISORY:
http://secunia.com/advisories/17789/

CRITICAL:
Moderately critical

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

WHERE:
>From remote

SOFTWARE:
PHP Web Statistik 1.x
http://secunia.com/product/6262/

DESCRIPTION:
Francesco "aScii" Ongaro has discovered some vulnerabilities and a
security issue in PHP Web Statistik, which can be exploited by
malicious people to disclose system information, cause a DoS (Denial
of Service), and conduct cross-site scripting and script insertion
attacks.

1) Input passed to the "lastnumber" parameter in "stat.php" isn't
properly sanitised before being returned to the user. This can be
exploited to execute arbitrary HTML and script code in a user's
browser session in context of an affected site.

2) The problem is that the configuration and log database files are
insecurely stored inside the web root. This can be exploited to
disclose certain configuration settings and logging information.

3) Input passed to the "lastnumber" parameter in "stat.php" isn't
properly verified before being used in an loop statement. This can be
exploited to consume a large amount of CPU resources on a vulnerable
system via an overly large "lastnumber" parameter.

4) Input passed to the "referer" header isn't properly sanitised
before being used. This can be exploited to inject arbitrary HTML and
script code, which will be executed in a user's browser session in
context of an affected site when the malicious user data is viewed.

It has also been reported that the program does not rotate the log
database.

The vulnerabilities and the security issue have been confirmed in
version 1.4.a and has also been reported in version 1.4. Other
versions may also be affected.

SOLUTION:
Edit the source code to ensure that input is properly sanitised and
verified. Move the configuration and log database files out of the
web root.

PROVIDED AND/OR DISCOVERED BY:
Francesco "aScii" Ongaro

ORIGINAL ADVISORY:
http://www.ush.it/2005/11/19/php-web-statistik/

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