Hi, I'm revisiting bugs that have been dormant for too long trying to retriage them.
In this case the current situation to me looks like: - openldap change 3cd50fa having landed in v2.5.8 and later - cyrus-sasl change 975edbb6 still isn't in any release AFAICS - that is odd as https://github.com/cyrusimap/cyrus-sasl/pull/601 which it is part of landed - it is in the master branch as expected - but cyrus-sasl-2.1.28 which was tagged much later does not contain it There must be something to understand between cyrus-sasl and cyrus-impad releases that I not know yet :-) $ git range-diff cyrus-sasl-2.1.27..cyrus-sasl-2.1.28 cyrus-sasl-2.1.27..upstream/master ... -: -------- > 51: 975edbb6 Add Channel Binding support for GSSAPI/GSS-SPNEGO I have no experience/insight in their release process. But @Sergio - maybe it is time to revisit that why it has been left out and trying to at least add it to Kinetic if it makes sense. ** Changed in: openldap (Ubuntu) Assignee: (unassigned) => Sergio Durigan Junior (sergiodj) ** Tags added: server-todo -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to openldap in Ubuntu. https://bugs.launchpad.net/bugs/1912256 Title: Missing channel binding prevents authentication to ActiveDirectory Status in openldap package in Ubuntu: New Bug description: > Are you uncertain if your issue is really a bug? Effect is an authentication error. Root case is a "missing feature" (see below) and requires updating dependencies, downporting. > If you are certain this is a bug please include the source package the bug is in. It's in the interaction between three libraries: openldap, cyrus-sasl, krb5 > 1) The release of Ubuntu you are using, via 'lsb_release -rd' or System -> About Ubuntu Broken in 18.04 and also in 20.10 (I guess it's also broken in anything inbetween) > 2) The version of the package you are using, via 'apt-cache policy pkgname' or by checking in Software Center libsasl2-modules-gssapi-mit: 2.1.27+dfsg-2ubuntu1 ldap-utils: 2.4.53+dfsg-1ubuntu1.2 libgssapi-krb5-2: 1.17-10ubuntu0.1 > 3) What you expected to happen # kinit $ export LDAPSASL_CBINDING=tls-endpoint $ ldapwhoami -O minssf=0,maxssf=0 -N -Y GSSAPI -H ldaps://<DC-fqdn> SASL/GSSAPI authentication started SASL username: <some-username> SASL SSF: 0 u:<some-username> > 4) What happened instead SASL/GSSAPI authentication started ldap_sasl_interactive_bind_s: Invalid credentials (49) additional info: 80090346: LdapErr: DSID-0C090597, comment: AcceptSecurityContext error, data 80090346, v4563 --------------- Microsoft ActiveDirectory has "LDAP Channel Binding" and recommends activating this as a required feature. See https://access.redhat.com/articles/4661861 Authentication to any AD DC which has mandatory channel binding fails. Channel binding requires at least an update to cyrus-sasl, which is not in any release as far as I can see: https://github.com/cyrusimap/cyrus- sasl/commit/975edbb69070eba6b035f08776de771a129cfb57 It also needs this commit in openldap: https://git.openldap.org/openldap/openldap/-/commit/3cd50fa8b32a21040a9892e2a8a7a9dfc7541ce6 Which as far as I can tell is v2.5 (branch OPENLDAP_REL_ENG_2_5). RH also mentions it needs up-to-date krb5 libraries, but I can't tell what minimum version this needs. I can build all libraries from source, current master (except for krb5 where I've used 1.18.3) and can confirm that channel binding works when using those libraries. I'm not sure if Samba is affected, but at least adcli, ldap-utils, and I would guess by extension also SSSD and realmd. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openldap/+bug/1912256/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
