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AUSCERT External Security Bulletin Redistribution
Shibboleth Service Provider Security Advisory
20 December 2018
AusCERT Security Bulletin Summary
Product: Shibboleth Service Provider
Operating System: Linux variants
Impact/Access: Denial of Service -- Remote/Unauthenticated
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Shibboleth Service Provider Security Advisory [19 December 2018]
An updated version of the Shibboleth Service Provider software
is now available which corrects a denial of service vulnerability.
Shibboleth SP software crashes on malformed date/time content
SAML messages, assertions, and metadata all commonly contain
date/time information in a standard XML format.
Invalid formatted data in such fields cause an exception of a type
that was not handled properly in the V3 software and causes a crash
(usually to the shibd daemon process, but possibly to Apache in rare
cases). Note that the crash occurs prior to evaluation of a message's
authenticity, so can be exploited by an untrusted attacker.
The problem is believed to be specific to the V3 software and
would not cause a crash in the older, now unsupported, V2 software.
All SP versions between 3.0.0 and 3.0.2 are affected.
Update to V3.0.3 or later of the Service Provider software, which is
Paolo Smiraglia, Antonio Giovanni Schiavone, Michele D'Amico,
and Umberto Rosini, of Agenzia per l'Italia Digitale (AgID)
URL for this Security Advisory:
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