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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2011.0735 Shibboleth Identity Provider Security Advisory [18 July 2011] 19 July 2011 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Shibboleth IdP v2.1.0 and later Publisher: Shibboleth Operating System: Windows UNIX variants (UNIX, Linux, OSX) Impact/Access: Provide Misleading Information -- Existing Account Resolution: Patch/Upgrade - --------------------------BEGIN INCLUDED TEXT-------------------- Shibboleth Identity Provider Security Advisory [18 July 2011] Mult-Session Information Leakage ================================ In order to carry environmental information (e.g., IP address) not directly linked to a user's identity but available only at authentication time some sites have developed custom login handlers that place this additional information in the user's session. This information is then, often, retrieved by the attribute resolver and used in some manner. If a user logs in to the IdP from multiple user-agents, and thus establishes multiple, concurrent sessions and the service provider queries for attributes about the user, only the information from the first established session will be available to the resolver. As an example, if the IP address of the client is stored in the first session and the user then logs in from a different user agent with a different IP address only the initial IP address will be visible during an attribute query. Affected Versions ================= Shibboleth IdP v2.1.0 and later Recommendations =============== Do not use attribute queries in conjunction with session information that is not directly tied to user authentication. Instead, consider pushing attributes during SSO. Credits ======= Manuel Haim, Philipps-Universität Marburg URL for this Security Advisory: http://shibboleth.internet2.edu/secadv/secadv_20110718.txt - -- Chad La Joie http://itumi.biz trusted identities, delivered - -- - --------------------------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. 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Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== 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 iQIVAwUBTiTdZO4yVqjM2NGpAQIQow//eskSykMCG4lhK5tttZ9qPFWhEnwtsyxQ APSiwRJ+PszbCU8581msI5XyVboy3z9Bg6T8dMLAQgw1HUlmPOr2zhMGOi/ttKHM dhHoXTsqFFN2QBdTtpp47ZykK4yXDxLrP8Di/0iiB9zrOP6X5sDtnlqgYgzMWj0Z g7JEB4TejfIui656eSclRk278hD3dFHfLFnyq2wmkc5Ac6henZw8VUYAF8/ojtN3 WNGUW0BVIcUm8UUihLYg1fJyWe+zxQellUkwRahAWDFU45aUByVWEvT0uvHzftrq HZirerzOcassxAbT9fd60qgO8BZYFfd+u+uOE18qaVlsf4XWQehAjwd7HtvCma77 Tby8tWwhFdSa87hlfJCOrILrXFyxZCrMbhlWCjD4IxMm3wLkcwPs9be6bo6D5AD1 NpEpiw0640vvYT9kSpTB2wCeobGQ6ic95pzrw770A8Gx53yvzRv8zzVHYlXMl9Pd KE1sL1yBvUcrpHP1V5W26NJ+2+ZgkWReAJg6kVYKpSPFuM8Z3BRhNCAoDeuK8VPh bKe5iolXVU0L6p9aESqU7ljXDSqj8gqpOzkmq+JfJRBFerh66jCnLJ8+LCqkFXaS TK6tIE02UImvWHFWWCJWX/h7wcEarN+eG/WePj3xXeov7+cUgiLF3kWQeroHcKKx GlPA4OxkMzM= =20tJ -----END PGP SIGNATURE-----