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TITLE:
PostNuke Cross-Site Scripting and SQL Injection Vulnerabilities

SECUNIA ADVISORY ID:
SA14868

VERIFY ADVISORY:
http://secunia.com/advisories/14868/

CRITICAL:
Moderately critical

IMPACT:
Cross Site Scripting, Manipulation of data, Exposure of system
information

WHERE:
>From remote

SOFTWARE:
PostNuke 0.x
http://secunia.com/product/350/

DESCRIPTION:
Diabolic Crab has reported some vulnerabilities in PostNuke, which
can be exploited by malicious people to conduct SQL injection and
cross-site scripting attacks.

1) Input passed to the "module" parameter in "admin.php" and the "op"
parameter in "user.php" is not 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 a vulnerable
site.

2) Input passed to the "sid" parameter isn't properly sanitised
before being used in a  SQL query. This can be exploited to
manipulate SQL queries by injecting arbitrary SQL code.

Example:
http://[victim]/modules.php?op=modload&name=News&file=article&sid=[code]&POSTNUKESID=[id]

It is also possible to disclose the full installation path via some
invalid input.

The vulnerabilities have been reported in version 0.760-rc3. Other
versions may also be affected.

SOLUTION:
Edit the source code to ensure that input is properly sanitised.

PROVIDED AND/OR DISCOVERED BY:
Diabolic Crab

ORIGINAL ADVISORY:
http://digitalparadox.org/advisories/postnuke.txt

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