Users of the lasso packages could previously experience several problems related to Red Hat Enterprise Linux interoperability with Microsoft Active Directory Federation Services (ADFS). Authentication against ADFS failed when using the mod_auth_mellon module. In addition, in Apache sessions, the limit for the number of elements was insufficient and multi-value variables were not supported. Also, the MellonCond parameter did not work when used together with the MellonSetEnv(NoPrefix) parameter. This update fixes the above described problems with ADFS interoperability. (BZ#1160636, BZ#1167796)
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://rhn.redhat.com/errata/RHBA-2015-1253.html
Description of problem: Current version of mod_auth_mellon in 6.6 (0.8.0) suffers from few problems not allowing us to deploy it at large organization scale: 1.) The generated apache session environment size is limited to 128 elements (env. variables): in our MS ADFS environment that number of elements can be as high as 1024 (user groups) - current implementation of mod_auth_mellon exits with 'internal server error' in such case. [ https://github.com/UNINETT/mod_auth_mellon/issues/10 ] 2.) related to 1.) - by default generated environment contains series of variables named alike MYVAR_0=val0 , MYVAR_1=val1 .. etc (single values). This is not very practical for programmatic comparisons .. (and makes porting of in-house applications from other auth. providers complicated) Multivalue variables alike MYVAR=val0;val1;... etc as for example shibboleth/mod_shib generates seem to be more suitable for that purpose. [ https://github.com/UNINETT/mod_auth_mellon/pull/9 ] 3.) a bug: MellonCond does not work with MellonSetEnv(NoPrefix) [ https://github.com/UNINETT/mod_auth_mellon/issues/12 ] Patches fixing above problems (merged upstream, apply cleanly on 0.8.0-3 in 6.6): 1). https://github.com/UNINETT/mod_auth_mellon/commit/75f6df7d49175915155b618e38a0eba3b7ae9389 2). https://github.com/UNINETT/mod_auth_mellon/commit/f02f4c7c7c47c853da61865cd5982e75f7177dcf 3). https://github.com/UNINETT/mod_auth_mellon/commit/6e8958f8311be0a772b6034b2a62cd923fb58c83 Note: same patches would be needed for upcoming RHEL 7.1 mod_auth_mellon Please consider adding above patches to next mod_auth_mellon releases. Best Regards Jarek PS: for full MS ADFS interoperabilty also this fix is needed: https://bugzilla.redhat.com/show_bug.cgi?id=1160636