Date: Thu, 18 Feb 2021 12:53:39 -0500 From: Bill Lucy <wtlucy@...che.org> To: oss-security@...ts.openwall.com Subject: CVE-2021-26296: Cross-Site Request Forgery (CSRF) vulnerability in Apache MyFaces Description: In the default configuration, Apache MyFaces Core versions 2.2.0 to 2.2.13, 2.3.0 to 2.3.7, 2.3-next-M1 to 2.3-next-M4, and 3.0.0-RC1 use cryptographically weak implicit and explicit cross-site request forgery (CSRF) tokens. Due to that limitation, it is possible (although difficult) for an attacker to calculate a future CSRF token value and to use that value to trick a user into executing unwanted actions on an application. This issue is being tracked as MYFACES-4373 Mitigation: Existing web.xml configuration parameters can be used to direct MyFaces to use SecureRandom for CSRF token generation: org.apache.myfaces.RANDOM_KEY_IN_VIEW_STATE_SESSION_TOKEN=secureRandom org.apache.myfaces.RANDOM_KEY_IN_CSRF_SESSION_TOKEN=secureRandom org.apache.myfaces.RANDOM_KEY_IN_WEBSOCKET_SESSION_TOKEN=secureRandom Credit: Apache MyFaces would like to thank Wolfgang Ettlinger (Certitude Consulting GmbH) Regards, Bill Lucy, MyFaces PMC
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