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Arrow  Topic :

PyForum 1.0.3 Multiple Vulnerabilities


Arrow  SecurityAlert : 6879
Arrow  CVE : CVE-2009-4407
Arrow  CVE : CVE-2009-4408
Arrow  CWE : CWE-352
Arrow  CWE : CWE-79
Arrow  SecurityRisk : Medium  Security Risk Medium  (About)
Arrow  Remote Exploit : Yes
Arrow  Local Exploit : No
Arrow  Victim interaction required : Yes
Arrow  Exploit Available : No
Arrow  Credit : Nam Nguyen
Arrow  Published : 26.12.2009

Arrow  Affected Software : pyforum:pyforum:1.0.0
pyforum:pyforum:1.0.1
pyforum:pyforum:1.0.2
pyforum:pyforum:1.0.3 and previous versions



Arrow  Advisory Content :  

BLUE MOON SECURITY ADVISORY 2009-08
===================================

:Title: Multiple Vulnerabilities in PyForum
:Severity: Critical
:Reporter: Hoang Quoc Thinh and Blue Moon Consulting
:Products: PyForum v1.0.3
:Fixed in: --

Description
-----------

PyForum is a 100% python-based message board system based in the excellent
web2py framework.

We have discovered cross site scripting and cross site request forgery
vulnerabilities in PyForum. The first allows arbitrary script to run when a
post is viewed. The second allows attackers to submit forms (such as
changing password) automatically without user's knowledge.

XSS vulnerability lies in the BBcode parsing in module ``models.parser``.
The ``img`` and ``url`` tags do not sanitize inputs and hence are
susceptible to script injection.

CSRF vulnerability lies in the design of this web application. Forms do not
have secure cookies and may be automatically submitted on behalf of the
user.

These bugs are rated at critical because they can be easily exploited and
cause lost of integrity.

These bugs may exist in older versions and in zForum, from which pyForum
derives, too.

Workaround
----------

There is no workaround.

Fix
---

There is no fix at the moment.

Disclosure
----------

Blue Moon Consulting adapts `RFPolicy v2.0
<http://www.wiretrip.net/rfp/policy.html>`_ in notifying vendors.

:Initial vendor contact:

December 05, 2009: Notice sent to Julio Flores Schwarzbeck (techfuel.net)

December 09, 2009: Reminder sent to Julio Flores Schwarzbeck

:Vendor response:

--

:Further communication:

--

:Public disclosure: December 15, 2009

:Exploit code:

No exploit code required.

Disclaimer
----------

The information provided in this advisory is provided "as is" without
warranty of any kind. Blue Moon Consulting Co., Ltd disclaims all
warranties, either express or implied, including the warranties of
merchantability and fitness for a particular purpose. Your use of the
information on the advisory or materials linked from the advisory is at
your own risk. Blue Moon Consulting Co., Ltd reserves the right to change
or update this notice at any time.
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Arrow  References :

http://xforce.iss.net/xforce/xfdb/54855
http://www.securityfocus.com/archive/1/archive/1/508478/100/0/threaded
http://www.osvdb.org/61051
http://secunia.com/advisories/37764




Arrow  Feedback :

If you have additional information or notice any errors regarding this security advisory, please use contact form or email us at info()securityreason()com.
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