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Kerberos Version 5, Release 1.18 Release Notes The MIT Kerberos Team Copyright and Other Notices --------------------------- Copyright (C) 1985-2020 by the Massachusetts Institute of Technology and its contributors. All rights reserved. Please see the file named NOTICE for additional notices. Documentation ------------- Unified documentation for Kerberos V5 is available in both HTML and PDF formats. The table of contents of the HTML format documentation is at doc/html/index.html, and the PDF format documentation is in the doc/pdf directory. Additionally, you may find copies of the HTML format documentation online at https://web.mit.edu/kerberos/krb5-latest/doc/ for the most recent supported release, or at https://web.mit.edu/kerberos/krb5-devel/doc/ for the release under development. More information about Kerberos may be found at https://web.mit.edu/kerberos/ and at the MIT Kerberos Consortium web site https://kerberos.org/ Building and Installing Kerberos 5 ---------------------------------- Build documentation is in doc/html/build/index.html or doc/pdf/build.pdf. The installation guide is in doc/html/admin/install.html or doc/pdf/install.pdf. If you are attempting to build under Windows, please see the src/windows/README file. Reporting Bugs -------------- Please report any problems/bugs/comments by sending email to krb5-bugs@mit.edu. You may view bug reports by visiting https://krbdev.mit.edu/rt/ and using the "Guest Login" button. Please note that the web interface to our bug database is read-only for guests, and the primary way to interact with our bug database is via email. DES no longer supported ----------------------- Beginning with the krb5-1.18 release, single-DES encryption types are no longer supported. Major changes in 1.18.2 (2020-05-21) ------------------------------------ This is a bug fix release. * Fix a SPNEGO regression where an acceptor using the default credential would improperly filter mechanisms, causing a negotiation failure. * Fix a bug where the KDC would fail to issue tickets if the local krbtgt principal's first key has a single-DES enctype. * Add stub functions to allow old versions of OpenSSL libcrypto to link against libkrb5. * Fix a NegoEx bug where the client name and delegated credential might not be reported. krb5-1.18.2 changes by ticket ID -------------------------------- 8898 Fix overzealous SPNEGO src_name/deleg_cred release 8905 Add stubs for some removed replay cache functions 8906 KDC can select local TGT key of unsupported enctype 8908 Fix SPNEGO acceptor mech filtering Major changes in 1.18.1 (2020-04-13) ------------------------------------ This is a bug fix release. * Fix a crash when qualifying short hostnames when the system has no primary DNS domain. * Fix a regression when an application imports "service@" as a GSS host-based name for its acceptor credential handle. * Fix KDC enforcement of auth indicators when they are modified by the KDB module. * Fix removal of require_auth string attributes when the LDAP KDB module is used. * Fix a compile error when building with musl libc on Linux. * Fix a compile error when building with gcc 4.x. * Change the KDC constrained delegation precedence order for consistency with Windows KDCs. krb5-1.18.1 changes by ticket ID -------------------------------- 8876 Fix AS-REQ checking of KDB-modified indicators 8877 Cannot remove require_auth attribute with LDAP KDB module 8880 Fix Linux build error with musl libc 8881 Segfault in k5_primary_domain 8884 Change KDC constrained-delegation precedence order 8886 Document client keytab usage 8888 compile failure on red hat 6 8891 Codespell report for "krb5" (on fossies.org) 8894 Correct formatting of trace log microseconds 8895 ksu does not honor KRB5CCNAME 8896 Fix typo in SPAKE modprinc example Major changes in 1.18 (2019-02-12) ---------------------------------- Administrator experience: * Remove support for single-DES encryption types. * Change the replay cache format to be more efficient and robust. Replay cache filenames using the new format end with ".rcache2" by default. * setuid programs will automatically ignore environment variables that normally affect krb5 API functions, even if the caller does not use krb5_init_secure_context(). * Add an "enforce_ok_as_delegate" krb5.conf relation to disable credential forwarding during GSSAPI authentication unless the KDC sets the ok-as-delegate bit in the service ticket. * Use the permitted_enctypes krb5.conf setting as the default value for default_tkt_enctypes and default_tgs_enctypes. Developer experience: * Implement krb5_cc_remove_cred() for all credential cache types. * Add the krb5_pac_get_client_info() API to get the client account name from a PAC. Protocol evolution: * Add KDC support for S4U2Self requests where the user is identified by X.509 certificate. (Requires support for certificate lookup from a third-party KDB module.) * Remove support for an old ("draft 9") variant of PKINIT. * Add support for Microsoft NegoEx. (Requires one or more third-party GSS modules implementing NegoEx mechanisms.) * Honor the transited-policy-checked ticket flag on application servers, eliminating the requirement to configure capaths on servers in some scenarios. User experience: * Add support for "dns_canonicalize_hostname=fallback""`, causing host-based principal names to be tried first without DNS canonicalization, and again with DNS canonicalization if the un-canonicalized server is not found. * Expand single-component hostnames in host-based principal names when DNS canonicalization is not used, adding the system's first DNS search path as a suffix. Add a "qualify_shortname" krb5.conf relation to override this suffix or disable expansion. Code quality: * The libkrb5 serialization code (used to export and import krb5 GSS security contexts) has been simplified and made type-safe. * The libkrb5 code for creating KRB-PRIV, KRB-SAFE, and KRB-CRED messages has been revised to conform to current coding practices. * The test suite has been modified to work with macOS System Integrity Protection enabled. * The test suite incorporates soft-pkcs11 so that PKINIT PKCS11 support can always be tested. krb5-1.18 changes by ticket ID ------------------------------ 5891 kdb_ldap should treat entries with "nsAccountLock: true" as locked 7135 gssapi mechanism glue dlcloses objects potentially after they are already unloaded 7765 Some ccache functions not exported 7871 KDC should not fail requests due to forwardable/proxiable option 8349 use __APPLE_USE_RFC_3542 to get IPV6_PKTINFO on Mac OS X 8761 ksu doesn't allow acquisition of non-forwardable tickets 8764 get_creds can add redundant cache entry for referral ticket 8765 Add dns_canonicalize_hostname=fallback support 8773 Mark deprecated enctypes when used 8775 Process SPNEGO error tokens through mech 8777 S4U2Self with X.509 certificate bugs 8778 Add new kvno protocol transition options 8780 Expand S4U2Self exception in KDC lineage check 8781 Add KDC support for X.509 S4U2Self requests 8784 Use better name type for PKINIT KDC certs 8785 Use memory replay cache for DO_TIME auth contexts 8786 Hash-based replay cache implementation 8788 Rename configure.in to configure.ac 8791 Add option to build without libkeyutils 8792 Implement krb5_cc_remove_cred for remaining types 8793 Remove srvtab support 8794 Remove kadmin RPC support for setting v4 key 8795 configure: chech for libncursesw, if libncurses is not found 8798 Remove ovsec_adm_export dump format support 8799 Check more errors in OpenSSL crypto backend 8800 Add secure_getenv() support 8804 Remove checksum type profile variables 8805 Modernize example enctypes in documentation 8806 kdb5_util errors on command arguments matching command names 8807 Set a more modern default ksu CMD_PATH 8808 Remove single-DES support 8811 In klist, display ticket server if different 8812 Remove support for no-flags SAM-2 preauth 8815 Verify PAC client name independently of name-type 8816 kproplog cannot display LOCKDOWN_KEYS attribute 8817 Remove PKINIT draft 9 support 8819 gss_set_allowable_enctypes() fails if any enctypes aren't recognized 8823 Allow the KDB to see and modify auth indicators 8827 Change definition of KRB5_KDB_FLAG_CROSS_REALM 8828 Add API to get client account name from PAC 8829 Fix authdata signatures for non-TGT AS-REQs 8833 Add environment variable for GSS mech config 8842 Record start time of AS requests earlier in KDC 8843 Allow client canonicalization in non-krbtgt AS-REP 8844 SPNEGO should filter mechs on acceptor with gss_acquire_cred() 8845 SPNEGO init/accept output parameter bugs 8847 Add enforce_ok_as_delegate setting 8849 Install gssapi/gssapi_alloc.h properly 8851 NegoEx 8855 Qualify short hostnames when not using DNS 8856 segfault in krb5-1.17.1/src/lib/krb5/krb/authdata.c 8857 Don't warn in kadmin when no policy is specified 8858 Do not always canonicalize enterprise principals 8859 Remove KRB5_KDB_FLAG_ALIAS_OK 8860 Allow kprop over NATs 8861 Fix LDAP policy enforcement of pw_expiration 8864 Fix error handling in gssint_mechglue_init() 8865 Check cross-realm TGT name for RBCD requests 8866 Fix S4U client authdata handling 8867 Fix KDC crash in handle_signticket 8868 Allow cross-realm RBCD with PAC and other authdata 8869 Apply permitted_enctypes to KDC request enctypes 8870 Honor transited-policy-checked flag in servers 8872 Put KDB authdata first 8873 Don't assume OpenSSL failures are memory errors 8874 Always use S4U2Proxy second ticket parsed authdata Acknowledgements ---------------- Past Sponsors of the MIT Kerberos Consortium: Apple Carnegie Mellon University Centrify Corporation Columbia University Cornell University The Department of Defense of the United States of America (DoD) Fidelity Investments Google Iowa State University MIT Michigan State University Microsoft MITRE Corporation Morgan-Stanley The National Aeronautics and Space Administration of the United States of America (NASA) Network Appliance (NetApp) Nippon Telephone and Telegraph (NTT) US Government Office of the National Coordinator for Health Information Technology (ONC) Oracle Pennsylvania State University Red Hat Stanford University TeamF1, Inc. The University of Alaska The University of Michigan The University of Pennsylvania Past and present members of the Kerberos Team at MIT: Danilo Almeida Jeffrey Altman Justin Anderson Richard Basch Mitch Berger Jay Berkenbilt Andrew Boardman Bill Bryant Steve Buckley Joe Calzaretta John Carr Mark Colan Don Davis Sarah Day Alexandra Ellwood Carlos Garay Dan Geer Nancy Gilman Matt Hancher Thomas Hardjono Sam Hartman Paul Hill Marc Horowitz Eva Jacobus Miroslav Jurisic Barry Jaspan Benjamin Kaduk Geoffrey King Kevin Koch John Kohl HaoQi Li Jonathan Lin Peter Litwack Scott McGuire Steve Miller Kevin Mitchell Cliff Neuman Paul Park Ezra Peisach Chris Provenzano Ken Raeburn Jon Rochlis Jeff Schiller Jen Selby Robert Silk Bill Sommerfeld Jennifer Steiner Ralph Swick Brad Thompson Harry Tsai Zhanna Tsitkova Ted Ts'o Marshall Vale Taylor Yu The following external contributors have provided code, patches, bug reports, suggestions, and valuable resources: Ian Abbott Brandon Allbery Russell Allbery Brian Almeida Michael B Allen Pooja Anil Jeffrey Arbuckle Heinz-Ado Arnolds Derek Atkins Mark Bannister David Bantz Alex Baule David Benjamin Thomas Bernard Adam Bernstein Arlene Berry Jeff Blaine Toby Blake Radoslav Bodo Sumit Bose Emmanuel Bouillon Isaac Boukris Philip Brown Samuel Cabrero Michael Calmer Andrea Campi Julien Chaffraix Puran Chand Ravi Channavajhala Srinivas Cheruku Leonardo Chiquitto Seemant Choudhary Howard Chu Andrea Cirulli Christopher D. Clausen Kevin Coffman Simon Cooper Sylvain Cortes Ian Crowther Arran Cudbard-Bell Jeff D'Angelo Nalin Dahyabhai Mark Davies Dennis Davis Alex Dehnert Mark Deneen Günther Deschner John Devitofranceschi Marc Dionne Roland Dowdeswell Dorian Ducournau Viktor Dukhovni Jason Edgecombe Mark Eichin Shawn M. Emery Douglas E. Engert Peter Eriksson Juha Erkkilä Gilles Espinasse Ronni Feldt Bill Fellows JC Ferguson Remi Ferrand Paul Fertser Fabiano Fidêncio Frank Filz William Fiveash Jacques Florent Ákos Frohner Sebastian Galiano Marcus Granado Dylan Gray Norm Green Scott Grizzard Helmut Grohne Steve Grubb Philip Guenther Timo Gurr Dominic Hargreaves Robbie Harwood John Hascall Jakob Haufe Matthieu Hautreux Jochen Hein Paul B. Henson Jeff Hodges Christopher Hogan Love Hörnquist Åstrand Ken Hornstein Henry B. Hotz Luke Howard Jakub Hrozek Shumon Huque Jeffrey Hutzelman Sergey Ilinykh Wyllys Ingersoll Holger Isenberg Spencer Jackson Diogenes S. Jesus Pavel Jindra Brian Johannesmeyer Joel Johnson Lutz Justen Alexander Karaivanov Anders Kaseorg Bar Katz Zentaro Kavanagh Mubashir Kazia W. Trevor King Patrik Kis Martin Kittel Thomas Klausner Matthew Krupcale Mikkel Kruse Reinhard Kugler Tomas Kuthan Pierre Labastie Andreas Ladanyi Chris Leick Volker Lendecke Jan iankko Lieskovsky Todd Lipcon Oliver Loch Chris Long Kevin Longfellow Frank Lonigro Jon Looney Nuno Lopes Todd Lubin Ryan Lynch Glenn Machin Roland Mainz Sorin Manolache Robert Marshall Andrei Maslennikov Michael Mattioli Nathaniel McCallum Greg McClement Cameron Meadors Alexey Melnikov Franklyn Mendez Markus Moeller Kyle Moffett Paul Moore Keiichi Mori Michael Morony Zbysek Mraz Edward Murrell Nikos Nikoleris Felipe Ortega Michael Osipov Andrej Ota Dmitri Pal Javier Palacios Dilyan Palauzov Tom Parker Eric Pauly Leonard Peirce Ezra Peisach Alejandro Perez Zoran Pericic W. Michael Petullo Mark Phalan Sharwan Ram Brett Randall Jonathan Reams Jonathan Reed Robert Relyea Tony Reix Martin Rex Pat Riehecky Jason Rogers Matt Rogers Nate Rosenblum Solly Ross Mike Roszkowski Guillaume Rousse Joshua Schaeffer Jens Schleusener Andreas Schneider Paul Seyfert Tom Shaw Jim Shi Jerry Shipman Peter Shoults Richard Silverman Cel Skeggs Simo Sorce Michael Spang Michael Ströder Bjørn Tore Sund Ondřej Surý Joe Travaglini Tim Uglow Rathor Vipin Denis Vlasenko Jorgen Wahlsten Stef Walter Max (Weijun) Wang John Washington Stef Walter Xi Wang Nehal J Wani Kevin Wasserman Margaret Wasserman Marcus Watts Andreas Wiese Simon Wilkinson Nicolas Williams Ross Wilper Augustin Wolf Garrett Wollman David Woodhouse Tsu-Phong Wu Xu Qiang Neng Xue Zhaomo Yang Nickolai Zeldovich Bean Zhang Hanz van Zijst Gertjan Zwartjes The above is not an exhaustive list; many others have contributed in various ways to the MIT Kerberos development effort over the years. Other acknowledgments (for bug reports and patches) are in the doc/CHANGES file.
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