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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2018.3938 Shibboleth Service Provider Security Advisory 20 December 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Shibboleth Service Provider Publisher: Shibboleth Operating System: Linux variants Windows OS X Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade Original Bulletin: https://shibboleth.net/community/advisories/secadv_20181219a.txt - --------------------------BEGIN INCLUDED TEXT-------------------- 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. Recommendations =============== Update to V3.0.3 or later of the Service Provider software, which is now available. Credits ======= Paolo Smiraglia, Antonio Giovanni Schiavone, Michele D'Amico, and Umberto Rosini, of Agenzia per l'Italia Digitale (AgID) URL for this Security Advisory: https://shibboleth.net/community/advisories/secadv_20181219a.txt - --------------------------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. 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Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== 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). 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