Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2009.0171 -- [Win][UNIX/Linux] Shibboleth IdP 2.X cross-site request attack 26 February 2009 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Shibboleth Publisher: The Shibboleth Team Operating System: UNIX variants (UNIX, Linux, OSX) Windows Impact: Cross-site Request Forgery Access: Remote/Unauthenticated - --------------------------BEGIN INCLUDED TEXT-------------------- Shibboleth IdP 2.X cross-site request attack ================================== All current versions of the Shibboleth 2 IdP are vulnerable to a cross-site attack during certain error conditions. Such attacks could allow attackers to phish credentials, steal active session, or otherwise intercept user/idp communications. Affected Systems =========== All current versions of the Shibboleth 2 IdP. Addressing the Issue =========== Within the Shibboleth IdP distribution bundle (the directory structure created by expanding the downloaded archive from the shibboleth site) edit the file 'src/main/webapp/error.jsp' and remove the following lines (lines 20 - 25 in the default file). <% Throwable error = (Throwable) request.getAttribute(AbstractErrorHandler.ERROR_KEY); if(error != null){ %> <strong>Error Message: <%= error.getMessage() %></strong> <% } %> Then, re-run the installation script (this time answering "no" when asked if you want to overwrite your existing configuration) and restart your Servlet container. All error messages will still be include in the IdP's log file but the simpler error message will not be displayed to the user. The next bugfix release of Shibboleth, currently scheduled for release in 1 - 1.5 weeks, will contain the fix for this issue and re-enable the display of the simpler error messages. Credits =========== Mike Suvanto, from CSC, for finding the bug - -- The Shibboleth Team - --------------------------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 iD8DBQFJpdWHNVH5XJJInbgRAmxBAJ95IILnn3YmSXSO9YDodrvDliYVFACfTzFr w3Wpa1vwHgn6MBH6IMbQ28E= =hJHh -----END PGP SIGNATURE-----