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             AUSCERT External Security Bulletin Redistribution

                    ESB-2008.1017 -- [Win][UNIX/Linux]
       Shibboleth IdP 2.0 UsernamePassword Login Handler Vulnerable
                       to Cross-site Request Attack
                              4 November 2008

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        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

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Shibboleth IdP 2.0 UsernamePassword Login Handler Vulnerable to
Cross-site Request Attack
=======================================================

Shibboleth IdP 2.0 includes a login handler that accepts username and
passwords and authenticates the user against systems such as LDAP or
Kerberos domains. This login handler is vulnerable to a cross-site
request attack.  Such attacks could allow the attacker to intercept
username/passwords or steal active sessions.

Affected Systems
===========
Shibboleth IdP 2.0 deployments that use the UsernamePassword login handler.

A deployment is using the UsernamePassword login handler if, in the
handler.xml, there is an uncommented <LoginHandler> of type
'UsernamePassword'.

Addressing the Issue
=============
All affected deployment should immediately upgrade to Shibboleth IdP 2.1

Credits
=====
Celeste Copeland, from SAS, for finding the bug.
- -- 
The Shibboleth Team

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===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
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