agorum core Pro 7.8.1.4-251 – Persistent Cross-Site Scripting
<!-- Source: https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2017-005.txt Advisory ID: SYSS-2017-005 Product: agorum core Pro Manufacturer: agorum Software GmbH Affected Version(s): 7.8.1.4-251 Tested Version(s): 7.8.1.4-251 Vulnerability Type: Persistent Cross-Site Scripting (CWE-79) Risk Level: High Solution Status: Open Manufacturer Notification: 2017-02-06 Solution Date: 2017-04-06 Public Disclosure: 2017-04-12 CVE Reference: Not yet assigned Author of Advisory: Dr. Erlijn van Genuchten & Sascha Grimmeisen, SySS GmbH ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Overview: agorum core Pro is a module based Document Management System. It allows the customer to buy only required modules and can be extended when needed. Due to the possibility to upload HTML files that can include JavaScript attack vectors, the DMS is vulnerable to persistent cross-site scripting. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Vulnerability Details: SySS GmbH found out that the "file upload" function of the desk4web module is prone to persistent cross-site scripting attacks as users are allowed to upload and display HTML files that include JavaScript code. This code is executed in the context of other users when opening the file and can therefore be used to attack other users. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Proof of Concept (PoC): In the desk4web module, users are able to upload files. For example, a file called "xssattack.html" with the following content can be uploaded: --> <html> <head> </head> <body> <script>alert("XSS Attack")</script> </body> </html> <!-- When opening this file, the message "XSS Attack" is displayed. As this file can be opened by other users, the included JavaScript code can be used to attack other users. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Solution: Update to agorum core 7.11.3. [4] ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Disclosure Timeline: 2017-01-30: Vulnerability discovered 2017-02-06: Vulnerability reported to manufacturer 2017-04-06: Public disclosure 2017-04-06: Fix confirmed by manufacturer 2017-04-12: Vulnerability published ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ References: [1] Product website for agorum Software GmbH http://mein-dms.agorum.com/ [2] SySS Security Advisory SYSS-2017-005 https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2017-005.txt [3] SySS Responsible Disclosure Policy https://www.syss.de/en/news/responsible-disclosure-policy/ [4] Agorum Change Log https://d4w.agorum.com/roiwebui/files/520986548/Changelog.html ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Credits: This security vulnerability was found by Dr. Erlijn van Genuchten and Sascha Grimmeisen of SySS GmbH. E-Mail: erlijn.vangenuchten@syss.de Public Key: https://www.syss.de/fileadmin/dokumente/PGPKeys/Erlijn_van_Genuchten.asc Key ID: 0xBD96FF2A Key Fingerprint: 17BB 4CED 755A CBB3 2D47 C563 0CA5 8637 BD96 FF2A E-Mail: sascha.grimmeisen@syss.de Public Key: https://www.syss.de/fileadmin/dokumente/PGPKeys/Sascha_Grimmeisen.asc Key ID: 0xD3D9C868 Key Fingerprint: 4937 7FCF BA8E 3D80 1AAD 4AC4 7C1D E510 D3D9 C868 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 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 --> |