openldap-bugs February 2026

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113 discussions

[Issue 9796] New: Deprecate GnuTLS support
by openldap-its＠openldap.org 20 May '26

20 May '26

https://bugs.openldap.org/show_bug.cgi?id=9796 Issue ID: 9796 Summary: Deprecate GnuTLS support Product: OpenLDAP Version: 2.6.1 Hardware: All OS: All Status: UNCONFIRMED Keywords: needs_review Severity: normal Priority: --- Component: libraries Assignee: bugs(a)openldap.org Reporter: quanah(a)openldap.org Target Milestone: --- Support for GnuTLS was added specifically for the Debian (and thus Ubuntu) due to the license objections at the time that the Debian project had for the OpenSSL license. Since that time, Debian has reclassified OpenSSL as a core library and the OpenSSL project has resolved the original complaint by licensing OpenSSL 3 and later under the Apache License v2. Thus there is no longer a reason to maintain support for GnuTLS and given the long standing concerns over the security and quality of the GnuTLS bridge in addition to the extra cost of maintaining that code, it should be marked as deprecated and removed in a future release. -- You are receiving this mail because: You are on the CC list for the issue.

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[Issue 10415] New: Allow limiting the buffers for data pending to be sent to client
by openldap-its＠openldap.org 20 May '26

20 May '26

https://bugs.openldap.org/show_bug.cgi?id=10415 Issue ID: 10415 Summary: Allow limiting the buffers for data pending to be sent to client Product: OpenLDAP Version: unspecified Hardware: All OS: All Status: UNCONFIRMED Keywords: needs_review Severity: normal Priority: --- Component: lloadd Assignee: bugs(a)openldap.org Reporter: ondra(a)mistotebe.net Target Milestone: --- In many scenarios it is more useful to limit the amount of data we buffer to be written to the client's socket even if it means that sometimes a connection might have to be dropped abruptly to enforce this. -- You are receiving this mail because: You are on the CC list for the issue.

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[Issue 10162] New: Fix for binary attributes data corruption in back-sql
by openldap-its＠openldap.org 20 May '26

20 May '26

https://bugs.openldap.org/show_bug.cgi?id=10162 Issue ID: 10162 Summary: Fix for binary attributes data corruption in back-sql Product: OpenLDAP Version: unspecified Hardware: All OS: All Status: UNCONFIRMED Keywords: needs_review Severity: normal Priority: --- Component: backends Assignee: bugs(a)openldap.org Reporter: dex.tracers(a)gmail.com Target Milestone: --- Created attachment 1006 --> https://bugs.openldap.org/attachment.cgi?id=1006&action=edit Fix for binary attributes corruption on backed-sql I've configured slapd to use back-sql (mariadb through odbc) and observed issues with the BINARY data retrievals from the database. The length of the attributes was properly reported, but the correct data inside was always 16384 bytes and after that point - some junk (usually filled-up with AAAAAAAA and some other attributes data from memory). During the debugging - I've noticed that: - The MAX_ATTR_LEN (16384 bytes) is used to set the length of the data for BINARY columns when SQLBindCol is done inside of the "backsql_BindRowAsStrings_x" function - After SQLFetch is done - data in row->cols[i] is fetched up to the specified MAX_ATTR_LEN - After SQLFetch is done - the correct data size (greater than MAX_ATTR_LEN) is represented inside of the row->value_len I'm assuming that slapd allocates the pointer in memory (row->cols[i]), fills it with the specified amount of data (MAX_ATTR_LEN), but when forming the actual attribute data - uses the length from row->value_len and so everything from 16384 bytes position till row->value_len is just a junk from the memory (uninitialized, leftovers, data from other variables). After an investigation, I've find-out that: - for BINARY or variable length fields - SQLGetData should be used - SQLGetData supports chunked mode (if length is unknown) or full-read mode if the length is known - it could be used in pair with SQLBindCol after SQLFetch (!) Since we have the correct data length inside of row->value_len, I've just added the code to the backsql_get_attr_vals() function to overwrite the corrupted data with the correct data by issuing SQLGetData request. And it worked - binary data was properly retrieved and reported over LDAP! My current concerns / help needed - I'm not very familiar with the memory allocation/deallocation mechanisms, so I'm afraid that mentioned change can lead to memory corruption (so far not observed). Please review attached patch (testing was done on OPENLDAP_REL_ENG_2_5_13, and applied on the master branch for easier review/application). -- You are receiving this mail because: You are on the CC list for the issue.

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[Issue 9367] New: back-mdb: encryption support
by openldap-its＠openldap.org 15 May '26

15 May '26

https://bugs.openldap.org/show_bug.cgi?id=9367 Issue ID: 9367 Summary: back-mdb: encryption support Product: OpenLDAP Version: unspecified Hardware: All OS: All Status: UNCONFIRMED Severity: normal Priority: --- Component: backends Assignee: bugs(a)openldap.org Reporter: quanah(a)openldap.org Target Milestone: --- Need to add encryption support to the back-mdb backend, depends on issue#9364 -- You are receiving this mail because: You are on the CC list for the issue.

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[Bug 9225] New: back-mdb: Add support for PREPARE/2-phase commit
by openldap-its＠openldap.org 13 May '26

13 May '26

https://bugs.openldap.org/show_bug.cgi?id=9225 Bug ID: 9225 Summary: back-mdb: Add support for PREPARE/2-phase commit Product: OpenLDAP Version: 2.4.50 Hardware: All OS: All Status: UNCONFIRMED Severity: normal Priority: --- Component: backends Assignee: bugs(a)openldap.org Reporter: quanah(a)openldap.org Target Milestone: --- Add support for PREPARE/2-phase commit in back-mdb -- You are receiving this mail because: You are on the CC list for the bug.

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[Issue 10274] New: Replication issue on MMR configuration
by openldap-its＠openldap.org 13 May '26

13 May '26

https://bugs.openldap.org/show_bug.cgi?id=10274 Issue ID: 10274 Summary: Replication issue on MMR configuration Product: OpenLDAP Version: 2.5.14 Hardware: All OS: Linux Status: UNCONFIRMED Keywords: needs_review Severity: normal Priority: --- Component: slapd Assignee: bugs(a)openldap.org Reporter: falgon.comp(a)gmail.com Target Milestone: --- Created attachment 1036 --> https://bugs.openldap.org/attachment.cgi?id=1036&action=edit In this attachment you will find 2 openldap configurations for 2 instances + slamd conf exemple + 5 screenshots to show the issue and one text file to explain what you see Hello we are openning this issue further to the initial post in technical : https://lists.openldap.org/hyperkitty/list/openldap-technical@openldap.org/… Issue : We are working on a project and we've come across an issue with the replication after performance testing : *Configuration :* RHEL 8.6 OpenLDAP 2.5.14 *MMR-delta *configuration on multiple servers attached 300,000 users configured and used for tests *olcLastBind: TRUE* Use of SLAMD (performance shooting) *Problem description:* We are currently running performance and resilience tests on our infrastructure using the SLAMD tool configured to perform BINDs and MODs on a defined range of accounts. We use a load balancer (VIP) to poll all of our servers equally. (but it is possible to do performance tests directly on each of the directories) With our current infrastructure we're able to perform approximately 300 MOD/BIND/s. Beyond that, we start to generate delays and can randomly come across one issue. However, when we run performance tests that exceed our write capacity, our replication between servers can randomly create an incident with directories being unable to catch up with their replication delay. The directories update their contextCSNs, but extremely slowly (like freezing). From then on, it's impossible for the directories to catch again. (even with no incoming traffic) A restart of the instance is required to perform a full refresh and solve the incident. We have enabled synchronization logs and have no error or refresh logs to indicate a problem ( we can provide you with logs if necessary). We suspect a write collision or a replication conflict but this is never write in our sync logs. We've run a lot of tests. For example, when we run a performance test on a single live server, we don't reproduce the problem. Anothers examples: if we define different accounts ranges for each server with SALMD, we don't reproduce the problem either. If we use only one account for the range, we don't reproduce the problem either. ______________________________________________________________________ I have add some screenshots on attachement to show you the issue and all the explanations. ______________________________________________________________________ *Symptoms :* One or more directories can no longer be replicated normally after performance testing ends. No apparent error logs. Need a restart of instances to solve the problem. *How to reproduce the problem:* Have at least two servers in MMR mode Set LastBind to TRUE Perform a SLAMD shot from a LoadBalancer in bandwidth mode OR start multiple SLAMD test on same time for each server with the same account range. Exceed the maximum write capacity of the servers. *SLAMD configuration :* authrate.sh --hostname ${HOSTNAME} --port ${PORTSSL} \ --useSSL --trustStorePath ${CACERTJKS} \ --trustStorePassword ${CACERTJKSPW} --bindDN "${BINDDN}" \ --bindPassword ${BINDPW} --baseDN "${BASEDN}" \ --filter "(uid=[${RANGE}])" --credentials ${USERPW} \ --warmUpIntervals ${WARMUP} \ --numThreads ${NTHREADS} ${ARGS} -- You are receiving this mail because: You are on the CC list for the issue.

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[Bug 9211] New: Relax control is not consistently access-restricted
by openldap-its＠openldap.org 06 May '26

06 May '26

https://bugs.openldap.org/show_bug.cgi?id=9211 Bug ID: 9211 Summary: Relax control is not consistently access-restricted Product: OpenLDAP Version: 2.4.49 Hardware: All OS: All Status: UNCONFIRMED Severity: normal Priority: --- Component: slapd Assignee: bugs(a)openldap.org Reporter: ryan(a)openldap.org Target Milestone: --- The following operations can be performed by anyone having 'write' access (not even 'manage') using the Relax control: - modifying/replacing structural objectClass - adding/modifying OBSOLETE attributes Some operations are correctly restricted: - adding/modifying NO-USER-MODIFICATION attributes marked as manageable (Modification of non-conformant objects doesn't appear to be implemented at all.) In the absence of ACLs for controls, I'm of the opinion that all use of the Relax control should require manage access. The Relax draft clearly and repeatedly discusses its use cases in terms of directory _administrators_ temporarily relaxing constraints in order to accomplish a specific task. -- You are receiving this mail because: You are on the CC list for the bug.

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[Bug 9204] New: slapo-constraint allows anyone to apply Relax control
by openldap-its＠openldap.org 06 May '26

06 May '26

https://bugs.openldap.org/show_bug.cgi?id=9204 Bug ID: 9204 Summary: slapo-constraint allows anyone to apply Relax control Product: OpenLDAP Version: 2.4.49 Hardware: All OS: All Status: UNCONFIRMED Severity: normal Priority: --- Component: overlays Assignee: bugs(a)openldap.org Reporter: ryan(a)openldap.org Target Milestone: --- slapo-constraint doesn't limit who can use the Relax control, beyond the global limits applied by slapd. In practice, for many modifications this means any configured constraints are advisory only. In my opinion this should be considered a bug, in design if not implementation. I expect many admins would not read the man page closely enough to realize the behaviour does technically adhere to the letter of what's written there. Either slapd should require manage privileges for the Relax control globally, or slapo-constraint should perform a check for manage privilege itself, like slapo-unique does. Quoting ando in https://bugs.openldap.org/show_bug.cgi?id=5705#c4: > Well, a user with "manage" privileges on related data could bypass > constraints enforced by slapo-constraint(5) by using the "relax" > control. The rationale is that a user with manage privileges could be > able to repair an entry that needs to violate a constraint for good > reasons. Note that the user: > > - must have enough privileges to do it (manage) > > - must inform the DSA that intends to violate the constraint (by using > the control) but such privileges are currently not being required. -- You are receiving this mail because: You are on the CC list for the bug.

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[Issue 10265] New: Make it possible to change olcBkLloadListen at runtime
by openldap-its＠openldap.org 06 May '26

06 May '26

https://bugs.openldap.org/show_bug.cgi?id=10265 Issue ID: 10265 Summary: Make it possible to change olcBkLloadListen at runtime Product: OpenLDAP Version: unspecified Hardware: All OS: All Status: UNCONFIRMED Keywords: needs_review Severity: normal Priority: --- Component: lloadd Assignee: bugs(a)openldap.org Reporter: ondra(a)mistotebe.net Target Milestone: --- Currently, olcBkLloadListen changes only take effect on lloadd startup: - an added olcBkLloadListen should come online at the end of the modify operation - at the end of the modify operation a removed olcBkLloadListen will stop listening on the sockets associated with it, clients that connected over these are marked CLOSING - to facilitate replacing a value where URIs resolved sockets overlap, olcBkLloadListen should become a MAY in olcBkLloadConfig objectclass Lloadd's startup was modelled upon slapd's, but the requirements have changed considerably when it was turned into a module. Sockets are acquired at module configuration time, which is much later than standalone/slapd's own startup and so the way the URLs are handled also needs to be reworked. This will resolve other related issues. -- You are receiving this mail because: You are on the CC list for the issue.

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[Issue 10280] New: Combining positive & negated filters doesn't work with dynlist
by openldap-its＠openldap.org 06 May '26

06 May '26

https://bugs.openldap.org/show_bug.cgi?id=10280 Issue ID: 10280 Summary: Combining positive & negated filters doesn't work with dynlist Product: OpenLDAP Version: 2.5.18 Hardware: All OS: All Status: UNCONFIRMED Keywords: needs_review Severity: normal Priority: --- Component: overlays Assignee: bugs(a)openldap.org Reporter: code(a)pipoprods.org Target Milestone: --- The directory contains 3 users & 2 groups. user1 is in group1, user2 is in group2, user3 isn't is any group. Filter [1] matches users that are either: - member of group1 - member of group2 ✅ It returns user1 & user2 Filter [2] matches user that are: - not member of group1 nor group2 ✅ It returns user3 Filter [3] should match users that are either: - member of group1 - member of group2 - not member of group1 nor group2 ❌ It should return the 3 users but only returns users matched by the first part of the filter (whatever the first part, if we swap both parts we get the complementary search results) Filter [1]: (|(memberOf=cn=group1,ou=example-groups,dc=example,dc=com)(memberOf=cn=group2,ou=example-groups,dc=example,dc=com)) Filter [2]: (!(|(memberOf=cn=group1,ou=example-groups,dc=example,dc=com)(memberOf=cn=group2,ou=example-groups,dc=example,dc=com))) Filter [3]: (|(memberOf=cn=group1,ou=example-groups,dc=example,dc=com)(memberOf=cn=group2,ou=example-groups,dc=example,dc=com)(!(|(memberOf=cn=group1,ou=example-groups,dc=example,dc=com)(memberOf=cn=group2,ou=example-groups,dc=example,dc=com)))) Here's my dynlist config: ``` dn: olcOverlay={2}dynlist,olcDatabase={1}mdb,cn=config objectClass: olcOverlayConfig objectClass: olcDynListConfig olcOverlay: {2}dynlist olcDynListAttrSet: {0}groupOfURLs memberURL member+memberOf@groupOfNames structuralObjectClass: olcDynListConfig entryUUID: 7df8328a-fd72-103e-82df-6fed25d5f6c8 creatorsName: cn=config createTimestamp: 20240902122741Z entryCSN: 20240902122741.257759Z#000000#000#000000 modifiersName: cn=config modifyTimestamp: 20240902122741Z ``` Here's a LDIF to initialise directory contents: ``` dn: ou=example-groups,dc=example,dc=com changetype: add objectClass: organizationalUnit ou: example-groups dn: ou=example-users,dc=example,dc=com changetype: add objectClass: organizationalUnit ou: example-users dn: uid=user1,ou=example-users,dc=example,dc=com changetype: add objectClass: inetOrgPerson cn: User sn: One uid: user1 dn: uid=user2,ou=example-users,dc=example,dc=com changetype: add objectClass: inetOrgPerson cn: User sn: Two uid: user2 dn: uid=user3,ou=example-users,dc=example,dc=com changetype: add objectClass: inetOrgPerson cn: User sn: Three uid: user3 dn: cn=group1,ou=example-groups,dc=example,dc=com changetype: add objectClass: groupOfNames cn: group1 member: uid=user1,ou=example-users,dc=example,dc=com dn: cn=group2,ou=example-groups,dc=example,dc=com changetype: add objectClass: groupOfNames cn: group2 member: uid=user2,ou=example-users,dc=example,dc=com ``` -- You are receiving this mail because: You are on the CC list for the issue.

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openldap-bugs February 2026