Date: Tue, 24 Aug 2010 19:52:50 +0300
From: Henri Salo <henri@...v.fi>
To: full-disclosure@...ts.grok.org.uk
Subject: Re: [Bkis-04-2010] Multiple Vulnerabilities in
 OpenBlog

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On Mon, 23 Aug 2010 10:36:42 +0700
"Bkis" <minhbq@...v.com.vn> wrote:

> [Bkis-04-2010] Multiple Vulnerabilities in OpenBlog
> 
> 1. General Information
> 
> OpenBlog is a free software for developing blogging platform.
> OpenBlog is written on PHP language and available at
> http://www.open-blog.info. In August 2010, Bkis Security discovered
> some XSS, CSRF vulnerabilities on this software; especially, there is
> a vulnerability which might allow privilege elevation on OpenBlog
> 1.2.1. Taking advantage of this vulnerability, hacker might execute
> malicious code on user's browser or even get control of Blog. Bkis
> has sent its warning to the developer.
> 
> Details: http://security.bkis.com/?p=1382
> SVRT Advisory: Bkis-04-2010
> Initial vendor notification: 08/09/2010
> Release Date: 08/23/2010
> Update Date: 08/23/2010
> Discovered by: Duong Manh Linh, Truong Tu Hai, Nguyen Hoang Vinh -
> Bkis Attack Type: Bypass Authentication, XSS, CSRF
> Security Rating: High
> Impact: Code Execution
> Affected Software: Openblog< v1.2.1
> 
> 2. Technical Details
> 
> The most dangerous vulnerability resides on session module of
> OpenBlog. Exploiting this vulnerability, hacker can sign in a normal
> user' account but obtain administrator' privileges. This is due to
> the weakness in user's rights checking and authenticating mechanism,
> resulting in the high possibility of faking administrators'
> privileges.   
> 
> Besides, Bkis also found some XSS and CSRF vulnerabilities on the
> following OpenBlog's functions: 
> 
> XSS holes are found on the following modules: 
> -	Create a new post 
> -	Edit a post
> -	Create a new page
> 
> Because these modules' input variables are not adequately checked and
> filtered, hacker might insert his code into the path's links. If a
> user logins to his Blog and clicks the link, hacker's malicious code
> (JavaScript) will be executed, leading to the loss of user's personal
> information saved on the browser.  
> 
> CSRF vulnerabilities are found on the following modules: 
> -	Edit an user
> -	Setting
> -	Templates
> -	Disable/Enable Sidebar  
> -	Feed settings
> -	Bookmarking
> -	New post
> -	Edit a post
> -	Delete a post
> -	New page
> -	Edit a page
> -	Delete a page
> -	New navigation item
> -	Edit a navigation item
> -	New link
> -	Edit a link
> -	Delete a link
> -	New category
> -	Edit a category
> -	Delete a category
> -	Delete a comment
> -	Delete an user
> 
> OpenBlog does not require user's confirmation when performing the
> above functions. Therefore, users might be tricked into performing
> unwanted actions without their consent, like clicking faulty links,
> etc. Specifically, hacker might fool Blog's administrators into
> deleting, editing the posts on the Blog.
> 
> 3. Solution
> 
> Rating the vulnerability as critical, Bkis recommends organizations,
> individuals using OpenBlog be cautious with links of unknown origins.
> At the same time, users should keep themselves updated with the
> developer's information to get timely update.
> 
> ----------------------------------------------------------------------------
> --
> Bkis (www.bkis.com)
> Blog (blog.bkis.com)

Do you have CVE-identifier for these vulnerabilities?

Best regards,
Henri Salo
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