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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
AusCERT Security Bulletin Summary
Publisher: The Shibboleth Team
Operating System: UNIX variants (UNIX, Linux, OSX)
Impact: Cross-site Request Forgery
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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.
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
Addressing the Issue
All affected deployment should immediately upgrade to Shibboleth IdP 2.1
Celeste Copeland, from SAS, for finding the bug.
The Shibboleth Team
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