Page2Flip 2.5 Missing Access Control
Posted on 25 August 2015
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 Advisory ID: SYSS-2015-033 Product: Page2Flip Vendor: w!ssenswerft GmbH Affected Version(s): Premium App 2.5, probably also in Business App and Basic App, and in lower versions Tested Version(s): Premium App 2.5 Vulnerability Type: Missing Function Level Access Control (CWE-935) Risk Level: High Solution Status: Open Vendor Notification: 2015-06-29 Solution Date: Public Disclosure: CVE Reference: Not yet assigned Author of Advisory: Dr. Erlijn van Genuchten (SySS GmbH) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Overview: With the Page2Flip Web application, it is possible to create e-papers in PDF format that can be flicked through digitally. Such e-papers can be used for magazines, catalogues, flyers, etc. (see [1]). The Page2Flip app allows users to access functionality that should only be available for administrative users. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Vulnerability Details: The SySS GmbH identified that it is possible for a user with low privileges, to access functionality that should only be accessible by administrators, by directly entering the URL. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Proof of Concept (PoC): For example, by accessing the URL https://[host]/settings/users, all user names and e-mail addresses can be accessed. Also, by accessing the URL https://[host]/settings/extended, it is possible to perform the same actions as high privileged users are able to perform. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Solution: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Disclosure Timeline: 2015-06-23: Vulnerability discovered 2013-06-29: Vulnerability reported to vendor 2015-07-07: Reported vulnerabilities again as the vendor did not respond to the first e-mail 2015-07-14: Reminder sent concerning reported vulnerabilities 2015-08-24: Public release of security advisory according to the SySS Responsible Disclosure Policy ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ References: [1] Page2Flip homepage http://page2flip.de/ [2] SySS Responsible Disclosure Policy https://www.syss.de/en/news/responsible-disclosure-policy/ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Credits: Security vulnerability found by Responsible Hacker of the SySS GmbH. E-Mail: erlijn.vangenuchten@syss.de Public Key: https://www.syss.de/fileadmin/dokumente/Materialien/PGPKeys/Erlijn_vanGenuchten.asc Key ID: 0xBD96FF2A Key Fingerprint: 17BB 4CED 755A CBB3 2D47 C563 0CA5 8637 BD96 FF2A ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Disclaimer: The information provided in this security advisory is provided "as is" and without warranty of any kind. Details of this security advisory may be updated in order to provide as accurate information as possible. The latest version of this security advisory is available on the SySS Web site. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Copyright: Creative Commons - Attribution (by) - Version 3.0 URL: http://creativecommons.org/licenses/by/3.0/deed.en -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAEBCgAGBQJV2x2wAAoJEAylhje9lv8qwtUP/jFVxKdjZ4xWHKiB2wJNIyN2 cbJT29BAYGZjcKCtnJm8B6yfRjAN74RWnuD/2j/MUeUTLylOYYdwU8s5Jgne+qKA +qdZEHZ60mdxV+09CxGt6FKIvpWXflC7HBK02hrn6ipjmXLjVkXTWtg0pXUZ4Uq7 TjwC8sjUKhEHgIIlI531e4BXaXFcHm5oVq+byKnxWI9zyYLXL67TDxbDO//c4aGd Wy3jRurTtBx/Ugj8/8sVJ/oIs9MSHolMIKyRhUNDHf1AumgZWDwjFe1lhEPOELAo qVyUl+q1+52Mk9r8ij0fquTVdZlBg4mlIvnk6cSw83swtSkzmN2L8KdCUZfJHYdW FcfuUt2iS/ZbYXrv7sYeuVrvfCjvwblFOVakkZtf4VMwiww5Qbg0n6sKGMhRlE6F zVRjjizEgm4LEy8a1wQTm3M5jaWKnGlb32hHvD1NxDOYl+XjKDY/hye58XufTDf9 /HQyrTpw3YxLe19HODftVqWcDNi6TXmUC2D4d1xhE9dpRo06EwmUx8yGBxQo5Rtd hG5xG5C+aMbRqKMk451cEW5bfFMOjss/Ij4AL4SQVegs5QHmtgPpXv6BoARpJOKm w92aazYWGJiIAa6aaSwnTInyuStCwXz3m+HCEWpLuG97Aejh1rlSxdEyMU+NKBLK PzFMYcFUHie0XHRR/PPv =bzNQ -----END PGP SIGNATURE-----
