Debian Security Update DSA-4085 xmltooling - security update

[LinuxBot]

Philip Huppert discovered the Shibboleth service provider is vulnerable to impersonation attacks and information disclosure due to mishandling of DTDs in the XMLTooling XML parsing library. For additional details please refer to the upstream advisory at https://shibboleth.net/community/advisories/secadv_20180112.txt

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