Shibboleth Service Provider Security Advisory [26 August 2009] An updated version of the Shibboleth 1.3 Service Provider software, and the XMLTooling library from the 2.x Service Provider, are now available which correct a security issue. Shibboleth SP software improperly handles malformed URLs ============================================================ The Shibboleth software includes code to encode and decode URL information, and has been shown to crash on certain malformed encoded URLs due to a buffer overrun. The crash represents a Denial of Service threat, and as with most buffer issues could present a future threat for code injection. No specific attack of this nature is known, but one could exist. Recommendations --------------- Sites using 1.3.x should upgrade to the latest released version, 1.3.4, in the usual fashion. This includes an update to the legacy OpenSAML library, now at version 1.1.3. Sites using 2.x should upgrade to the latest XMLTooling library, version 1.2.2. No other components of the software are affected. Sites using a Windows version of the 2.x software can obtain this fix from the updated and signed postinstall.zip packages available on the download site for the 2.2.1 SP. The installers have also been updated, and you can easily check the xmltooling1_2.dll or log files to determine which version you have. Sites using non-Windows versions can update by building and installing the updated xmltooling package from source, or by RPM, Macport, or other applicable mechanism. Credits ------- Thanks to Chris Ries for reporting this issue. URL for this Security Advisory: http://shibboleth.internet2.edu/secadv/secadv_20090826.txt