A vulnerability has been reported in Shibboleth, which can be exploited by malicious people to conduct spoofing attacks.
The vulnerability is caused due to an error when processing certificate fields containing NULL ('\0') characters. This can be exploited to e.g. conduct Man-in-the-Middle (MitM) attacks via specially crafted certificates.
Successful exploitation requires that "PKIX" style of trust validation is used.
Solution: Update to version 1.3.3. or 2.2.1.
Provided and/or discovered by: The vendor credits Ian Young.
Original Advisory: http://shibboleth.internet2.edu/secadv/secadv_20090817.txt
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Subject: Shibboleth NULL Character Spoofing Vulnerability
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