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Re: (ITS#7657) Alias dereferencing with MDB slow compared with BDB
by hyc＠symas.com 26 Jul '19

26 Jul '19

Mark.Cairney(a)ed.ac.uk wrote: > Hi Howard, Hi Mark, thanks for the feedback. For completeness' sake, the tool I used to generate our test dataset is in http://www.openldap.org/its/index.cgi?findid=8875#followup14 > > Just to confirm that I'm seeing significantly better results with the > 2.4.48 RC release for querying OUs full of aliases and de-referencing them: > > Comparing 2 servers with the same data on them (one 2.4.47, the other > 2.4.48 with the new patch) and just after restarting slapd yield the > following: > > 2.4.48: 0.52s user 0.09s system 46% cpu 1.315 total (with a small spike > in CPU) > > 2.4.47: 0.46s user 0.94s system 0% cpu 3:39.89 total (with the CPU > spiking to 100% on the server for the duration of the query) > > > This is for an OU with 11932 entries in it (all aliasedObjects) > > On 15/07/2019 17:07, Howard Chu wrote: >> Fyi, we recently revisited this issue and are seeing improved results with >> commit e90e8c7d3c12d897bb0584ba04dc519d4f23acf9 in master. >> > -- -- Howard Chu CTO, Symas Corp. http://www.symas.com Director, Highland Sun http://highlandsun.com/hyc/ Chief Architect, OpenLDAP http://www.openldap.org/project/

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Re: (ITS#7657) Alias dereferencing with MDB slow compared with BDB
by Mark.Cairney＠ed.ac.uk 26 Jul '19

26 Jul '19

Hi Howard, Just to confirm that I'm seeing significantly better results with the 2.4.48 RC release for querying OUs full of aliases and de-referencing them: Comparing 2 servers with the same data on them (one 2.4.47, the other 2.4.48 with the new patch) and just after restarting slapd yield the following: 2.4.48: 0.52s user 0.09s system 46% cpu 1.315 total (with a small spike in CPU) 2.4.47: 0.46s user 0.94s system 0% cpu 3:39.89 total (with the CPU spiking to 100% on the server for the duration of the query) This is for an OU with 11932 entries in it (all aliasedObjects) On 15/07/2019 17:07, Howard Chu wrote: > Fyi, we recently revisited this issue and are seeing improved results with > commit e90e8c7d3c12d897bb0584ba04dc519d4f23acf9 in master. > -- /**************************** Mark Cairney ITI Enterprise Services Information Services University of Edinburgh Tel: 0131 650 6565 Email: Mark.Cairney(a)ed.ac.uk PGP: 0x435A9621 *******************************/ The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336.

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Re: (ITS#9052) ACL protections get lost if same identity uses different SSF levels
by quanah＠symas.com 24 Jul '19

24 Jul '19

--On Wednesday, July 24, 2019 3:45 PM -0700 Quanah Gibson-Mount <quanah(a)symas.com> wrote: > For informational purposes, here's additional detail as the subject and > original problem description do not fully capture the extend of the > problem. In all 2.x releases prior to 2.4.48 (I.e., 2.0.x, 2.1.x, 2.2.x, > 2.3.x, and 2.4.x up to 2.4.47), the SASL security factor layer was set > globally rather than per connection. So once a connection had been made > that sets a SASL SSF, any and all non SASL connections would inherit that > value. Correction -- sasl SSF was set per connection structure. Any new client connection that used the same connection structure as a previous connection would inherit the sasl_ssf value of the prior connection. In slapd, one can generally tell which connection structure is being used by looking at the file descriptor in use by a given connection (stats level logging will display this information, for example). On a busy server where connection structures are routinly being re-used then there is a high probability that this would apply to most connections as long as the majority of connections are setting SASL SSF values. --Quanah -- Quanah Gibson-Mount Product Architect Symas Corporation Packaged, certified, and supported LDAP solutions powered by OpenLDAP: <http://www.symas.com>

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Re: (ITS#9052) ACL protections get lost if same identity uses different SSF levels
by quanah＠symas.com 24 Jul '19

24 Jul '19

For informational purposes, here's additional detail as the subject and original problem description do not fully capture the extend of the problem. In all 2.x releases prior to 2.4.48 (I.e., 2.0.x, 2.1.x, 2.2.x, 2.3.x, and 2.4.x up to 2.4.47), the SASL security factor layer was set globally rather than per connection. So once a connection had been made that sets a SASL SSF, any and all non SASL connections would inherit that value. If ACLs are used to limit access via setting restrictions with the sasl_ssf parameter, connections with no sasl_ssf could match those ACLs incorrectly. For example, access to * by users sasl_ssf=56 read by users tls_ssf=128 read by * none Would allow a user who bound without any encryption full access to the database as long as one SASL connection had been made that had a minimum sasl_ssf value of 56. Another contrived example: access to attrs=userPassword by self sasl_ssf=56 =xw by * auth Would allow a user to change their own password whether or not they had performed a SASL bind with a sasl_ssf of 56. --Quanah -- Quanah Gibson-Mount Product Architect Symas Corporation Packaged, certified, and supported LDAP solutions powered by OpenLDAP: <http://www.symas.com>

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ITS#9052 published: SECURITY: ACL protections get lost if same identity uses different SSF levels
by openldap-its＠OpenLDAP.org 24 Jul '19

24 Jul '19

Private ITS#9052 is now publicly readable URL: http://www.OpenLDAP.org/its/?findid=9052

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ITS#9038 published: SECURITY: rootdn of any db can assert any identity
by openldap-its＠OpenLDAP.org 24 Jul '19

24 Jul '19

Private ITS#9038 is now publicly readable URL: http://www.OpenLDAP.org/its/?findid=9038

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Re: (ITS#9056) Replication does not work with different schemas on primary and secondary LDAP
by quanah＠symas.com 23 Jul '19

23 Jul '19

--On Tuesday, July 23, 2019 8:10 AM +0000 alex.soloviov(a)wildix.com wrote: > Actually, I have the configuration with several LDAP server without this = > problem. But the version of these LDAPs is a bit less - 2.4.31.=20 > On this installation when I changed the schema on the main server, on = > secondary I see fully replicated data and warnings about unknown = > attributes like: Yes, that was a known bug with older OpenLDAP versions. In general: a) Don't mix versions of OpenLDAP b) Use current releases of OpenLDAP c) Use delta-syncrepl for replication d) Upgrade the schema on replicas first, then on masters Regards, Quanah -- Quanah Gibson-Mount Product Architect Symas Corporation Packaged, certified, and supported LDAP solutions powered by OpenLDAP: <http://www.symas.com>

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Re: (ITS#9056) Replication does not work with different schemas on primary and secondary LDAP
by michael＠stroeder.com 23 Jul '19

23 Jul '19

On 7/23/19 12:42 PM, Alexander Soloviov wrote: > I understood the risks but how can I resolve my issue? As said: By fixing your schema setup on all replicas. > My case I want to upgrade all servers step by step without lost data > on secondary LDAP servers You probably don't want to read this: Fix schema on all replicas before the upgrade. Ciao, Michael.

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Re: (ITS#9056) Replication does not work with different schemas on primary and secondary LDAP
by alex.soloviov＠wildix.com 23 Jul '19

23 Jul '19

Ciao, Michael I understood the risks but how can I resolve my issue? My case I want to upgrade all servers step by step without lost data on = secondary LDAP servers For now when I add the new attribute to some item in LDAP then this item = lost on secondary servers. Moreover, replication stops after receiving the first item with unknown = data. So, I will lose not only one changed item and also all next I have a few hundred of LDAPs servers which should be updated one-by-one = and in this case, I will lose the data until upgrade all of them Thank you in advance. Best regards, Alex > On Jul 23, 2019, at 12:52, Michael Str=C3=B6der <michael(a)stroeder.com> = wrote: >=20 > On 7/23/19 9:10 AM, alex.soloviov(a)wildix.com wrote: >> Actually, I have the configuration with several LDAP server without = this =3D >> problem. But the version of these LDAPs is a bit less - 2.4.31.=3D20 >> On this installation when I changed the schema on the main server, on = =3D >> secondary I see fully replicated data and warnings about unknown =3D >> attributes like: >> 5d36b192 UNKNOWN attributeDescription "TESTTYPE" inserted. >=20 > Mainly running a replication setup without consistent schema on all = replicas is asking for trouble. It may work in some niche cases. But in = most cases it will fail miserably. >=20 > =3D> Fix your setup. >=20 > Ciao, Michael. >=20

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Re: (ITS#9056) Replication does not work with different schemas on primary and secondary LDAP
by michael＠stroeder.com 23 Jul '19

23 Jul '19

This is a cryptographically signed message in MIME format. --------------ms070709080204010000080303 Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 7/23/19 9:10 AM, alex.soloviov(a)wildix.com wrote: > Actually, I have the configuration with several LDAP server without thi= s =3D > problem. But the version of these LDAPs is a bit less - 2.4.31.=3D20 > On this installation when I changed the schema on the main server, on =3D= > secondary I see fully replicated data and warnings about unknown =3D > attributes like: >=20 > 5d36b192 UNKNOWN attributeDescription "TESTTYPE" inserted. Mainly running a replication setup without consistent schema on all=20 replicas is asking for trouble. It may work in some niche cases. But in=20 most cases it will fail miserably. =3D> Fix your setup. 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