CVE-2009-1030
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Descriptions du CVE
Cross-site scripting (XSS) vulnerability in the choose_primary_blog function in wp-includes/wpmu-functions.php in WordPress MU (WPMU) before 2.7 allows remote attackers to inject arbitrary web script or HTML via the HTTP Host header.
Informations du CVE
Faiblesses connexes
| Nom de la faiblesse | Source | |
|---|---|---|
| Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
Métriques
| Métriques | Score | Gravité | CVSS Vecteur | Source |
|---|---|---|---|---|
| V2 | 4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N | nvd@nist.gov |
EPSS
EPSS est un modèle de notation qui prédit la probabilité qu'une vulnérabilité soit exploitée.
Score EPSS
Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.
Percentile EPSS
Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.
Informations sur l'Exploit
Exploit Database EDB-ID : 8196
Date de publication : 2009-03-09 23h00 +00:00
Auteur : Juan Galiana Lara
EDB Vérifié : Yes
=============================================
INTERNET SECURITY AUDITORS ALERT 2009-004
- Original release date: December 3rd, 2008
- Last revised: March 10th, 2009
- Discovered by: Juan Galiana Lara
- Severity: 6.3/10 (CVSS scored)
=============================================
I. VULNERABILITY
-------------------------
WordPress MU < 2.7 'Host' HTTP Header Cross Site Scripting (XSS)
Vulnerability
II. BACKGROUND
-------------------------
WordPress MU, or multi-user, allows to run unlimited blogs with a
single install of wordpress. It is most famously used for
WordPress.com where it serves tens of millions of hits on hundreds of
thousands of blogs each day. Also is used in many other sites like
Harvard University and Le Monde.
III. DESCRIPTION
-------------------------
WordPress MU prior to version 2.7 fails to sanitize the Host header
correctly in choose_primary_blog function and is therefore prune to
XSS attacks.
Web Sites running in a name based virtual hosting setup are not
affected while they are not the default virtual host.
IV. PROOF OF CONCEPT
-------------------------
The snippet of vulnerable code:
In wp-includes/wpmu-functions.php, concretly in the function
choose_primary_blog:
1830 function choose_primary_blog() {
1831 global $current_user;
1832 ?>
1833 <table class="form-table">
1834 <tr>
1835 <th scope="row"><?php _e('Primary Blog'); ?></th>
1836 <td>
1837 <?php
1838 $all_blogs = get_blogs_of_user( $current_user->ID );
1839 if( count( $all_blogs ) > 1 ) {
1840 $primary_blog = get_usermeta($current_user->ID,
'primary_blog');
1841 ?>
1842 <select name="primary_blog">
1843 <?php foreach( (array) $all_blogs as $blog ) { ?>
1844 <option value='<?php echo $blog->userblog_id
?>'<?php if( $primary_blog == $blog->userblog_id ) echo '
selected="selected"' ?>>http://<?php echo $blog->domain.$blog->path
?></option>
1845 <?php } ?>
1846 </select>
1847 <?php
1848 } else {
1849 echo $_SERVER['HTTP_HOST']; <- HERE
1850 }
1851 ?>
1852 </td>
1853 </tr>
1854 </table>
1855 <?php
1856 }
The line 1849 contains the affected code "echo $_SERVER['HTTP_HOST'];"
and is possible to inject HTML and script code crafting HTTP Host header:
PoC:
$ curl -H "Cookie: my cookies here" -H "Host: <body
onload=alert(String.fromCharCode(88,83,83))>"
http://www.example.com/wp-admin/profile.php> tmp.html
$ firefox tmp.html
The javascript code will be executed in the context of the victim
browser, this can be exploited to steal cookies and escalate
privileges to administrator.
Tested with Wordpress MU 2.6.5, Apache 2.2 and Mozilla Firefox 3.0.6
V. BUSINESS IMPACT
-------------------------
The impact is the attacker can gain administrator privileges on the
application.
VI. SYSTEMS AFFECTED
-------------------------
Versions prior to 2.7 are affected
VII. SOLUTION
-------------------------
Upgrade to version 2.7 of wordpress multi-user. It can be downloaded
from http://mu.wordpress.org
VIII. REFERENCES
-------------------------
http://mu.wordpress.org
IX. CREDITS
-------------------------
This vulnerability has been discovered
by Juan Galiana Lara (jgaliana (at) isecauditors (dot) com).
X. REVISION HISTORY
-------------------------
December 03, 2008: Initial release
March 02, 2009: More details added
XI. DISCLOSURE TIMELINE
-------------------------
December 03, 2008: Vendor contacted
December 03, 2008: MU trunk code fixed
January 28, 2008: WordPress MU 2.7 released
March 10, 2009: Vulnerability published by
Internet Security Auditors (www.isecauditors.com)
XII. LEGAL NOTICES
-------------------------
The information contained within this advisory is supplied "as-is"
with no warranties or guarantees of fitness of use or otherwise.
Internet Security Auditors accepts no responsibility for any damage
caused by the use or misuse of this information.
# milw0rm.com [2009-03-10]
Products Mentioned
Configuraton 0
Wordpress>>Wordpress_mu >> Version To (including) 2.6
- Wordpress>>Wordpress_mu >> Version 1.1 (Open CPE detail)
- Wordpress>>Wordpress_mu >> Version 1.1.1 (Open CPE detail)
- Wordpress>>Wordpress_mu >> Version 1.2 (Open CPE detail)
- Wordpress>>Wordpress_mu >> Version 1.2.1 (Open CPE detail)
- Wordpress>>Wordpress_mu >> Version 1.2.2 (Open CPE detail)
- Wordpress>>Wordpress_mu >> Version 1.2.3 (Open CPE detail)
- Wordpress>>Wordpress_mu >> Version 1.2.4 (Open CPE detail)
- Wordpress>>Wordpress_mu >> Version 1.2.5 (Open CPE detail)
- Wordpress>>Wordpress_mu >> Version 1.3 (Open CPE detail)
- Wordpress>>Wordpress_mu >> Version 1.3.2 (Open CPE detail)
- Wordpress>>Wordpress_mu >> Version 1.3.3 (Open CPE detail)
- Wordpress>>Wordpress_mu >> Version 1.5.1 (Open CPE detail)
- Wordpress>>Wordpress_mu >> Version 2.6 (Open CPE detail)
Wordpress>>Wordpress_mu >> Version 1.0
Wordpress>>Wordpress_mu >> Version 1.0
Wordpress>>Wordpress_mu >> Version 1.0
Wordpress>>Wordpress_mu >> Version 1.0
Wordpress>>Wordpress_mu >> Version 1.0
Wordpress>>Wordpress_mu >> Version 1.1
- Wordpress>>Wordpress_mu >> Version 1.1 (Open CPE detail)
Wordpress>>Wordpress_mu >> Version 1.1.1
- Wordpress>>Wordpress_mu >> Version 1.1.1 (Open CPE detail)
Wordpress>>Wordpress_mu >> Version 1.2
- Wordpress>>Wordpress_mu >> Version 1.2 (Open CPE detail)
Wordpress>>Wordpress_mu >> Version 1.2.1
- Wordpress>>Wordpress_mu >> Version 1.2.1 (Open CPE detail)
Wordpress>>Wordpress_mu >> Version 1.2.2
- Wordpress>>Wordpress_mu >> Version 1.2.2 (Open CPE detail)
Wordpress>>Wordpress_mu >> Version 1.2.3
- Wordpress>>Wordpress_mu >> Version 1.2.3 (Open CPE detail)
Wordpress>>Wordpress_mu >> Version 1.2.4
- Wordpress>>Wordpress_mu >> Version 1.2.4 (Open CPE detail)
Wordpress>>Wordpress_mu >> Version 1.2.4
Wordpress>>Wordpress_mu >> Version 1.2.5a
Wordpress>>Wordpress_mu >> Version 1.3
- Wordpress>>Wordpress_mu >> Version 1.3 (Open CPE detail)
Wordpress>>Wordpress_mu >> Version 1.3.1
Wordpress>>Wordpress_mu >> Version 1.3.2
- Wordpress>>Wordpress_mu >> Version 1.3.2 (Open CPE detail)
Wordpress>>Wordpress_mu >> Version 1.3.3
- Wordpress>>Wordpress_mu >> Version 1.3.3 (Open CPE detail)
Wordpress>>Wordpress_mu >> Version 1.5
Wordpress>>Wordpress_mu >> Version 1.5.1
- Wordpress>>Wordpress_mu >> Version 1.5.1 (Open CPE detail)
Wordpress>>Wordpress_mu >> Version 2.6.1
- Wordpress>>Wordpress_mu >> Version 2.6.1 (Open CPE detail)
Wordpress>>Wordpress_mu >> Version 2.6.2
- Wordpress>>Wordpress_mu >> Version 2.6.2 (Open CPE detail)
Wordpress>>Wordpress_mu >> Version 2.6.3
- Wordpress>>Wordpress_mu >> Version 2.6.3 (Open CPE detail)
Wordpress>>Wordpress_mu >> Version 2.6.5
- Wordpress>>Wordpress_mu >> Version 2.6.5 (Open CPE detail)
Wordpress>>Wordpress_mu >> Version 2.7
- Wordpress>>Wordpress_mu >> Version 2.7 (Open CPE detail)
Références
http://www.securityfocus.com/archive/1/501667/100/0/threaded
Tags : mailing-list, x_refsource_BUGTRAQ
Tags : mailing-list, x_refsource_BUGTRAQ
