perfact::mpa Insecure Direct Object Reference
Posted on 01 March 2016
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 Advisory ID: SYSS-2015-072 Product(s): 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: Medium 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, different web application resources can be directly accessed. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Vulnerability Details: The SySS GmbH found out that different resources of the web application perfact::mpa can be directly accessed by the correct URL due to improper user authorization checks. That is, unauthorized users can access different functions of the perfact::mpa web application. With unauthorized access to many web application resources, an attacker can put the integrity of the web application database at risk by triggering functions or possibly find security vulnerabilities in the extended attack surface. For instance, within the test period the SySS GmbH could identify several OS command injection vulnerabilities in web application functions that could be accessed by unauthorized users (see security advisory SYSS-2015-065). ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Proof of Concept (PoC): Some examples of accessible web application resources that are not directly accessibly via the offered navigation menus of restricted users are: * https://<HOST>/<PATH>/logic_d/method_listing * https://<HOST>/<PATH>/printer_d/method_listing * https://<HOST>/<PATH>/SOAP_WS/load_service ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 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-2015-072 https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2015-072.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/AKAAoJENmkv2o0rU2r9x4P/12EapQ3vvrXRj7P5UEev2YY Ptb4U7uOj9+Ob1KGuGqVDR1aARth0kl06BrpzeuU9VS8xymx5VWtT+l4iTjdVyQG AdY7Dn7u8seeSmVnZL1Fb5HYypo23e/losoNzwbbdR0Ajb5nakCeKjo4jqQFm6Cu pQOiXLiQHJtym16MB9YTdz69kbV74aJOCRwl0PVDFU5kMgQwJ3H29FtaKbdHVRin t2Ps+U8Typ7gqsWVBQ/UWRgFio1xIeu/r0sLeBDDPOen2zNKRrUUzEzWErH0soH4 0z2JzpLEzmiow0b0nMCvq/kI14vzVfjDMB66U3UBwTJPN0Ypvg01KzK6zwkLChz6 gxESa7oAQ2VobsS4pSVc8lv1QVrkj2T1L7NljUTpqCECBBQscrudGlzQB3CgGPuE H0+bCtbJkXU3inV49S/ulVIzUA/4V2C4Xxn+pwb/2xochonsJ81NL9YOB2sE4I7Z gG0usf3T3ArMvLVJCD2b0oyjS6BmTTo4JXFEEg+NglBjw8Y+f6ptr5fN6qYYsiVW mzod+PHJJO+GloirTJcpPkhtkzwwAepSPM044g0CUPUhXVpKaOMBCdb+ovNq4SV/ ktKLr3nhuCa2IWjBOIjo7lpokSsEwblrF7h2weLe4mXKxes0oWtXdWOySoy7Z65p 1UJG4a/0+KbaOhyuaZQk =5LZ8 -----END PGP SIGNATURE-----
