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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2008.0107 -- [Win][UNIX/Linux] Drupal OpenID Module incorrect claimed_id returned 31 January 2008 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Drupal OpenID Module version 5.x-1.0 Publisher: Drupal Operating System: UNIX variants (UNIX, Linux, OSX) Windows Impact: Provide Misleading Information Access: Remote/Unauthenticated Original Bulletin: http://drupal.org/node/216022 - --------------------------BEGIN INCLUDED TEXT-------------------- - ------------SA-2008-016 - OPENID - INCORRECT CLAIMED_ID RETURNED FOR OPENID 2.0------------ * Advisory ID: DRUPAL-SA-2008-016 * Project: OpenID (third-party module) * Version: 5.x-1.0 * Date: 2007-January-30 * Security risk: Less critical * Exploitable from: Remote * Vulnerability: Identity impersonation - ------------DESCRIPTION------------ The OpenID module has a vulnerability which allows OpenID version 2.0 positive assertions that are not properly verified to return an invalid or impersonated claimed_id. To exploit this vulnerability an attacker could set up an OpenID provider, example1.com, that claimed to be the authority for another domain, example2.com, when in fact it was not. Thus, example2.com OpenID's could be impersonated. In OpenID 2.0, the OpenID provider may return a claimed_id that is different from the original claimed_id submitted by the user (and hence in the current session). If this is the case, then discovery must be performed on that claimed_id to ensure that the correct OpenID provider endpoint was used. For more information, see [ http://openid.net/specs/openid-authentication-2_0.html#verify_disco ] . - ------------VERSIONS AFFECTED------------ OpenID (openid) versions: * 5.x-1.0 and earlier Drupal core is not affected. If you do not use the contributed OpenID module, there is nothing you need to do. - ------------SOLUTION------------ Install the latest version: * OpenID 5.x-1.1 [ http://drupal.org/node/216029 ] See also the OpenID project page [ http://drupal.org/project/openid ]. - ------------REPORTED BY------------ Johnny Bufu [ http://drupal.org/user/226462 ]. - ------------CONTACT------------ The security contact for Drupal can be reached at security at drupal.org or via the form at [ http://drupal.org/contact ]. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 If you believe that your computer system has been compromised or attacked in any way, we encourage you to let us know by completing the secure National IT Incident Reporting Form at: http://www.auscert.org.au/render.html?it=3192 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQCVAwUBR6Fu0Ch9+71yA2DNAQIlggP9FYA3e7d3UuEm219qbu4qrMrWRjxeRvuS 8l3B3R/F6SucREXZcTScIf14RjCu2bxeLaj/Ih9uANbBgUvwwONBOi078E1sYiJO 2X4ylAoiDg3ebfMU83HYvb27ELwJgty3fZj4xEX9E/IwltMnDaffiw259u9lDxTQ GBYwe93OqEI= =la23 -----END PGP SIGNATURE-----