OpenAM 9 / 10 Cross Site Scripting
Posted on 25 February 2016
############################################################# # # COMPASS SECURITY ADVISORY http://www.csnc.ch/en/downloads/advisories.html ############################################################# # # CSNC ID: CSNC-2016-001 # Product: OpenAM [1] # Vendor: ForgeRock # Subject: Cross-Site Scripting - XSS # Risk: High # Effect: Remotely exploitable # Author: Stephan Sekula (stephan.sekula@csnc.de) # Date: February 23rd 2016 # ############################################################# Introduction: ------------- OpenAM provides core identity services to simplify the implementation of transparent single sign-on (SSO) as a security component in a network infrastructure. OpenAM provides the foundation for integrating diverse web applications that might typically operate against a disparate set of identity repositories and are hosted on a variety of platforms such as web and application servers. [1] Compass Security discovered a web application security flaw in the OpenAM application which allows an attacker to manipulate the resulting website. This allows, for instance, stealing of user sessions, attacking the user's browser or redirecting the user to a Phishing website. Since it is the victim who needs to visit the malicious link, this attack is possible for unauthenticated attackers who do not have access to the affected websites. Affected Versions: ------------------ The following OpenAM versions are vulnerable: - 9-9.5.5 - 10.0.0-10.0.2 - 10.1.0-Xpress - 11.0.0-11.0.3 - 12.0.0-12.0.2 OpenAM version 13.0.0 is not vulnerable. Patches: -------- OpenAM released patches for each affected version as part of OpenAM Security Advisory #201601 [2]. Technical Description: ---------------------- OpenAM provides a blacklist mechanism that allows specifying dangerous input. If user input is part of this blacklist, the user should be redirected to an error page. However, this mechanism is not implemented in page exportmetadata.jsp. Exploiting the vulnerability will lead to so-called Cross-Site Scripting (XSS), allowing the execution of JavaScript in the context of the victim and thus the impersonation of logged-in OpenAM users: https://<URL>/.../exportmetadata.jsp?entityid=sp&realm="<script>alert(0)</script> Response: ERROR : Unable to read configuration of component "SAML2" for realm ""<script>alert(0)</script>". Furthermore, a blacklist approach bears the risk of missing malicious input. Milestones: ----------- 2015-12-16: Vulnerability discovered 2016-01-04: Vendor notified 2016-02-05: Vendor provided patched version 2016-02-23: Public disclosure References: ----------- [1] http://openam.forgerock.org/ [2] https://forgerock.org/2016/02/openam-security-advisory-201601/
