[Full-Disclosure] WPkontakt message parsing error

[Jaroslaw Sajko <sloik@xxxxxxxxxxxxx>]

Product:        WPKontakt (<= 3.0.1)
Vendor:         Wirtualna Polska (http://kontakt.wp.pl/index.html)
Impact:         Remote script execution in Internet Zone
Severity:       Medium
Authors:        Blazej Miga <bla@xxxxxxxxxxxxx>,
                Jaroslaw Sajko <sloik@xxxxxxxxxxxxx>
Advisory:       http://www.man.poznan.pl/security/wpkontakt.html


[ISSUE]

WPkontakt is the another Polish instant messenger. The problem is similiar
to the problems revealed in GG or Tlen.pl - parsing error leading to the
remote script execution.


[DETAILS]

Parsing error while parsing en email addresses allows us to inject
javascript code like this:

test@"style="background-image:url(javascript:alert(%22You%20are%20owned!%22>))".wp.pl

The code will execute in Internet Zone.


[SOLUTION]

Please upgrade to the newest version (3.0.1p1)



          Coprights Poznan Supercomputing and Networking Center

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