Hello Christian, or anyone else affected, Accepted openldap into jammy-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/openldap/2.5.14+dfsg-0ubuntu0.22.04.2 in a few hours, and then in the -proposed repository.
Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users. If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed- jammy to verification-done-jammy. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification- failed-jammy. In either case, without details of your testing we will not be able to proceed. Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping! N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days. ** Changed in: openldap (Ubuntu Jammy) Status: In Progress => Fix Committed ** Tags added: verification-needed-jammy -- 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/2000817 Title: Wrong SHA256-value computed on kinetic Status in openldap package in Ubuntu: Fix Released Status in openldap source package in Jammy: Fix Committed Status in openldap source package in Kinetic: Fix Committed Status in openldap source package in Lunar: Fix Released Status in openldap package in Debian: Fix Released Bug description: [ Impact ] OpenLDAP deployments using the contrib pw-sha2 module are not able to authenticate their users because the SHA2 calculation is done incorrectly. Even though this is a contrib module, from an upstream PoV, it is shipped in the Ubuntu (and Debian) OpenLDAP packages, and available for use. Some fix possibilities were discussed in comment #5, and we selected the one with the least impact to OpenLDAP users at large, which is to recompile that module only without the strict-aliasing optimization. This update makes that change, and also includes a DEP8 change to verify it. We didn't use a patch for the pw-sha2 Makefile because d/rules overrides the OPT variable in the make command line (https://git.launchpad.net/~ahasenack/ubuntu/+source/openldap/tree/debian/rules?h=lunar- slapd-sha2-2000817#n44) [ Test Plan ] # Install slapd and openssl $ sudo apt install slapd openssl # Run the following script #!/bin/bash reference_hash="{SHA256}$(echo -n secret | openssl dgst -sha256 -binary | openssl enc -base64)" test_hash=$(slappasswd -s secret -h '{SHA256}' -o module-load=pw-sha2) echo "Reference hash of \"secret\" (openssl): ${reference_hash}" echo "slapd's pw-sha2 hash: ${test_hash}" if [ "${reference_hash}" != "${test_hash}" ]; then echo "ERROR: hashes differ" exit 1 else echo "PASS: hashes are identical" fi With the affected openldap package installed, the script should print an error. With the packages from proposed, the hashes should be identical. [ Where problems could occur ] The fix is a change of a compiler option strictly when building only the pw-sha2 module, so it's very localized. It could affect the performance of this module (for the worse), but it's already not working correctly. [ Other Info ] Not at this time. [Original Description] The OpenLDAP-contrib module sha2 (located in contrib/slapd- modules/passwd/sha2/) computes a wrong SHA256/SSHA256-hash on Ubuntu kinetic. This breaks our current password-authentication in ldap. The problematic computation: $ slappasswd -s secret -h '{SHA256}' -o module-load=pw-sha2 {SHA256}WIrrpN3OjEVOUf6yrH1j+o+ODuUuNBo979Od4UXnu54= The (correct) reference-value on the same system (or older ubuntu Versions): $ echo -n "secret" | openssl dgst -sha256 -binary | openssl enc -base64 K7gNU3sdo+OL0wNhqoVWhr3g6s1xYv72ol/pe/Unols= We nailed the problem down to a bug in the gcc-optimizer for strict- aliasing. so most probably the gcc-version on kinetic (v12.2.0) is the reason. The workaround is to compile the sha2-Module with the flag "-fno-strict-aliasing". Then the correct value is computed. An example taken from a git-compiled version of OpenLDAP 2.5.13: $ ./servers/slapd/slappasswd -T passwd -s secret -h '{SHA256}' -o module-load=pw-sha2 -o module-path=contrib/slapd-modules/passwd/sha2/.libs {SHA256}K7gNU3sdo+OL0wNhqoVWhr3g6s1xYv72ol/pe/Unols= Ubuntu: Description: Ubuntu 22.10 Release: 22.10 OpenLDAP-Package: 2.5.13+dfsg-1ubuntu1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openldap/+bug/2000817/+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
