-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 Advisory ID: SYSS-2015-067 Product: perfact::mpa Manufacturer: PerFact Innovation GmbH & Co. KG Affected Version(s): Custom versions using PerFact DB_Utils (Toolkit) < v3.2 Tested Version(s): Custom version with PerFact DB_Utils (Toolkit) < v3.2 Vulnerability Type: Insecure Direct Object References (CWE-932) Risk Level: High Solution Status: Fixed Manufacturer Notification: 2015-12-18 Solution Date: 2016-01-18 Public Disclosure: 2016-02-29 CVE Reference: Not yet assigned Authors of Advisory: Matthias Deeg and Sven Freund (SySS GmbH) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Overview: The software solution perfact::mpa is a software architecture that, for instance, is used to build web applications for the secure and reliable remote maintenance of machines via the Internet (see [1]). According to the manufacturer, remote control software built with perfact::mpa impresses through the following features: * location-independent and central monitoring, * maintenance and error management, * authorized remote access, and * integrated documentation of incidents and services. Due to improper authorization checks, unauthorized users can download arbitrary files that have been uploaded previously. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Vulnerability Details: SySS GmbH found out that unauthorized users are able to download arbitrary files of other users that have been uploaded via the file upload functionality. As the file names of uploaded files are incremental integer values, it is possible to enumerate and download all uploaded files without any authorization. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Proof of Concept (PoC): Uploaded files can be download without authorization using the following URL, where the file ID is an incremental integer value. https:////file// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Solution: According to information by the PerFact Innovation GmbH & Co. KG, the described security issue has been fixed in PerFact DB_Utils (toolkit) software version 3.2. Please contact the manufacturer for further information or support. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Disclosure Timeline: 2015-12-18: Vulnerability reported to manufacturer 2016-01-18: Response from manufacturer with detailed information about the reported security vulnerability and its solution status 2016-02-05: E-mail to manufacturer according two open questions 2016-02-05: Response from manufacturer with further information 2016-02-29: Public release of security advisory ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ References: [1] Product Web Site for perfact::mpa http://perfact.de/mpa/index_html [2] SySS Security Advisory SYSS-2015-067 https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2015-067.txt [3] SySS Responsible Disclosure Policy https://www.syss.de/en/responsible-disclosure-policy/ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Credits: This security vulnerability was found by Matthias Deeg and Sven Freund of the SySS GmbH. E-Mail: matthias.deeg (at) syss.de Public Key: https://www.syss.de/fileadmin/dokumente/Materialien/PGPKeys/Matthias_Deeg.asc Key fingerprint = D1F0 A035 F06C E675 CDB9 0514 D9A4 BF6A 34AD 4DAB E-Mail: sven.freund (at) syss.de Public Key: https://www.syss.de/fileadmin/dokumente/Materialien/PGPKeys/Sven_Freund.asc Key fingerprint = DCDB 7627 C1E3 9CE8 62DF 2666 8A5F A853 415D 46DC ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 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----- iQIcBAEBCgAGBQJW0/ACAAoJENmkv2o0rU2rkN4P/1GjC/HikaWUsN2n+5DkYaWy Ix9WGPCGGDXtdTjN+Ojgof1Sb1iELrVXi0eeeGfi5szUCY4ypIXhPAU7kvtivb8P Ux81PPUxfkSAJ5rKC5iEqWwe1AtRhsTS8RhTsN5DBwko7V3JYEtLnrhSl+unQ7Wu nd6a1gCe6a0UFKHtky6hCTA7Xc7e9qooXSlgwCDq2m1I6iQxHw9XYfa6bKqsDOU4 TtzP+qUgckQ3323OFuFtbaW0FVRb9syY10H1qaeHwetRc/XDzMk6KLfXDyLcTr0F cBHTWBbm7sgFLB1Q5hAtyTjiR7ckZYDmLs49sEGXYTozMClT6xtxE53VLlNwWL+u 7phNuhz8gftkmWwre/izXFpx77juOFVkNVhenVofWgc5p7ixqbcyVM5oFMbC8SsA rUtGoPRrbBZiFqTI1wHoLCnktEjo83j0HMpIvMTlg21FO4IHzIyCmIH2RCmaFf0k 9AtnUvNzqexI4TRI0mqhbXGyT+7NriHuCcNpNZRvruOLcSLo0kiWP3s4Box8ZXPA vnE1eRQ8p3aqqZdnfS19Ewz+tVQo70ERyAbFAjCmtvkig3fQBOJjr0ycAaleahbS lCKrUHZTDk8cdWVVCaKKDXOrypkKr+jed2TTuYLP5YmHWP6bal4DxrAsdrru6jFC YTERsGqN6LMUCQDkRiSf =lQuh -----END PGP SIGNATURE-----