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* heimdal-kadmin: Add support for the -f dump optionRick Macklem2025-10-052-327/+124
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The "-f" dump option allows a dump of the Heimdal KDC in a format that the MIT kdb5_util command can load into a MIT KDC's database. This makes transitioning from the Heimdal KDC to the current MIT one feasible without having to re-create the KDC database from scratch. glebius@ did the initial work, cherry picking these commits from the Heimdal sources on github and then doing extensive merge conflict resolution and other fixes so that it would build. Heimdal commit fca5399 authored by Nico Williams: Initial commit for second approach for multiple kvno. NOT TESTED! Heimdal commit 57f1545 authored by Nico Williams: Add support for writing to KDB and dumping HDB to MIT KDB dump format Before this change Heimdal could read KDBs. Now it can write to them too. Heimdal can now also dump HDBs (including KDBs) in MIT format, which can then be imported with kdb5_util load. This is intended to help in migrations from MIT to Heimdal by allowing migrations from Heimdal to MIT so that it is possible to rollback from Heimdal to MIT should there be any issues. The idea is to allow a) running Heimdal kdc/kadmind with a KDB, or b) running Heimdal with an HDB converted from a KDB and then rollback by dumping the HDB and loading a KDB. Note that not all TL data types are supported, only two: last password change and modify-by. This is the minimum necessary. PKINIT users may need to add support for KRB5_TL_USER_CERTIFICATE, and for databases with K/M history we may need to add KRB5_TL_MKVNO support. This resulted in a Heimdal kadmin that would dump the KDC database in MIT format. However, there were issues when this dump was loaded into the current MIT KDC in FreeBSD current/15.0. The changes I did to make the dump more useful are listed below: When "-f MIT" is used for "kadmin -l dump" it writes the dump out in MIT format. This dump format is understood by the MIT kdb5_util command. The patch modifies the above so that the MIT KDC's master key keytab file can be provided as the argument to "-f" so that the principals are re-encrypted in it. This allows any principal with at least one strong encryption type key to work without needing a change_password. The strong encryption types supported by the Heimdal KDC are: aes256-cts-hmac-sha1-96 aes128-cts-hmac-sha1-96 The issues my changes address are: - If there are weak encryption keys in a principal's entry, MIT's kadmin.local will report that the principcal's entry is incomplete or corrupted. - The keys are encrypted in Heimdal's master key. The "-d" option can be used on the "kadmin -l dump" to de-encrypt them, but the passwords will not work on the current MIT KDC. To try and deal with the above issues, this patch modied the above to: - Does not dump the weak keys. - Re-encrypts the strong keys in MIT's master key if the argument to "-f" is actually a filename which holds the MIT KDC's master key keytab and not "MIT". - For principals that only have weak keys, it generates a fake strong key. This key will not work on the MIT KDC, but the principal entry will work once a change_password is done to it. - It always generates a "modified_by" entry, faking one if not already present in the Heimdal KDC database. This was necessary, since the MIT kadmin will report that the principal entry is "incomplete or corrupted" without one. It also fixed a problem where "get principal" no longer worked after the initial patch was applied. A man page update will be done as a separate commit. I believe this commit is acceptable since the Heimdal sources are now essentially deprecated in favor of the MIT sources and that this new "-f" patch simplifies the transition to the MIT KDC. Discussed with: glebius, cy MFC after: 3 days
* Heimdal: CVE-2018-16860 Heimdal KDC: Reject PA-S4U2Self with unkeyed checksumCy Schubert2024-02-151-0/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Upstream's explanation of the problem: S4U2Self is an extension to Kerberos used in Active Directory to allow a service to request a kerberos ticket to itself from the Kerberos Key Distribution Center (KDC) for a non-Kerberos authenticated user (principal in Kerboros parlance). This is useful to allow internal code paths to be standardized around Kerberos. S4U2Proxy (constrained-delegation) is an extension of this mechanism allowing this impersonation to a second service over the network. It allows a privileged server that obtained a S4U2Self ticket to itself to then assert the identity of that principal to a second service and present itself as that principal to get services from the second service. There is a flaw in Samba's AD DC in the Heimdal KDC. When the Heimdal KDC checks the checksum that is placed on the S4U2Self packet by the server to protect the requested principal against modification, it does not confirm that the checksum algorithm that protects the user name (principal) in the request is keyed. This allows a man-in-the-middle attacker who can intercept the request to the KDC to modify the packet by replacing the user name (principal) in the request with any desired user name (principal) that exists in the KDC and replace the checksum protecting that name with a CRC32 checksum (which requires no prior knowledge to compute). This would allow a S4U2Self ticket requested on behalf of user name (principal) user@EXAMPLE.COM to any service to be changed to a S4U2Self ticket with a user name (principal) of Administrator@EXAMPLE.COM. This ticket would then contain the PAC of the modified user name (principal). Reported by: emaste Security: CVE-2018-16860 Obtained from: Upstream c6257cc2c MFC after: 1 week
* Heimdal: Fix transit path validation CVE-2017-6594Cy Schubert2024-02-151-2/+10
| | | | | | | | | | | | | | | | Apply upstream b1e699103. This fixes a bug introduced by upstream f469fc6 which may in some cases enable bypass of capath policy. Upstream writes in their commit log: Note, this may break sites that rely on the bug. With the bug some incomplete [capaths] worked, that should not have. These may now break authentication in some cross-realm configurations. Reported by: emaste Security: CVE-2017-6594 Obtained from: upstream b1e699103 MFC after: 1 week
* Correct three typos in manuals.Jens Schweikhardt2024-01-041-1/+1
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* heimdal: Fix man page and documentation typosCy Schubert2024-01-041-1/+1
| | | | | Reported by: Jens Schweikhardt <schweikh@schweikhardt.net> MFC: 1 week
* heimdal: Fix multiple security vulnerabilitiesCy Schubert2022-11-156-23/+45
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The following issues are patched: - CVE-2022-42898 PAC parse integer overflows - CVE-2022-3437 Overflows and non-constant time leaks in DES{,3} and arcfour - CVE-2021-44758 NULL dereference DoS in SPNEGO acceptors - CVE-2022-44640 Heimdal KDC: invalid free in ASN.1 codec Note that CVE-2022-44640 is a severe vulnerability, possibly a 10.0 on the Common Vulnerability Scoring System (CVSS) v3, as we believe it should be possible to get an RCE on a KDC, which means that credentials can be compromised that can be used to impersonate anyone in a realm or forest of realms. Heimdal's ASN.1 compiler generates code that allows specially crafted DER encodings of CHOICEs to invoke the wrong free function on the decoded structure upon decode error. This is known to impact the Heimdal KDC, leading to an invalid free() of an address partly or wholly under the control of the attacker, in turn leading to a potential remote code execution (RCE) vulnerability. This error affects the DER codec for all extensible CHOICE types used in Heimdal, though not all cases will be exploitable. We have not completed a thorough analysis of all the Heimdal components affected, thus the Kerberos client, the X.509 library, and other parts, may be affected as well. This bug has been in Heimdal's ASN.1 compiler since 2005, but it may only affect Heimdal 1.6 and up. It was first reported by Douglas Bagnall, though it had been found independently by the Heimdal maintainers via fuzzing a few weeks earlier. While no zero-day exploit is known, such an exploit will likely be available soon after public disclosure. - CVE-2019-14870: Validate client attributes in protocol-transition - CVE-2019-14870: Apply forwardable policy in protocol-transition - CVE-2019-14870: Always lookup impersonate client in DB Sponsored by: so (philip) Obtained from: so (philip) Tested by: philip, cy MFC after: immediately
* Update the existing heimdal implementation for OpenSSL 1.1.John Baldwin2018-10-053-35/+60
| | | | | | | | | | | | | | | | | | | | Existing work is underway to import a newer version of heimdal, but this patchset gets us to a fully working tree to enable more wide spread testing of OpenSSL 1.1 for now. I've also enabled WARNS=1 for kerberos (which is the reason for the change in libroken). Having -Werror enabled was useful during the 1.1 updates and we probably should have warnings enabled by default for kerberos anyway. This passes make tinderbox, and I have also done some very light runtime testing on amd64. Reviewed by: bjk, jkim, emaste Differential Revision: https://reviews.freebsd.org/D17276 Notes: svn path=/projects/openssl111/; revision=339198
* - Update FreeBSD's Heimdal distribution to 1.5.2. This is a bugfixStanislav Sedov2012-04-085-15/+17
|\ | | | | | | | | | | | | release, which fixes a DoS issue in libkrb5. Notes: svn path=/head/; revision=234027
* | - Update FreeBSD Heimdal distribution to version 1.5.1. This also bringsStanislav Sedov2012-03-2243-6424/+5968
|\| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | several new kerberos related libraries and applications to FreeBSD: o kgetcred(1) allows one to manually get a ticket for a particular service. o kf(1) securily forwards ticket to another host through an authenticated and encrypted stream. o kcc(1) is an umbrella program around klist(1), kswitch(1), kgetcred(1) and other user kerberos operations. klist and kswitch are just symlinks to kcc(1) now. o kswitch(1) allows you to easily switch between kerberos credentials if you're running KCM. o hxtool(1) is a certificate management tool to use with PKINIT. o string2key(1) maps a password into key. o kdigest(8) is a userland tool to access the KDC's digest interface. o kimpersonate(8) creates a "fake" ticket for a service. We also now install manpages for some lirbaries that were not installed before, libheimntlm and libhx509. - The new HEIMDAL version no longer supports Kerberos 4. All users are recommended to switch to Kerberos 5. - Weak ciphers are now disabled by default. To enable DES support (used by telnet(8)), use "allow_weak_crypto" option in krb5.conf. - libtelnet, pam_ksu and pam_krb5 are now compiled with error on warnings disabled due to the function they use (krb5_get_err_text(3)) being deprecated. I plan to work on this next. - Heimdal's KDC now require sqlite to operate. We use the bundled version and install it as libheimsqlite. If some other FreeBSD components will require it in the future we can rename it to libbsdsqlite and use for these components as well. - This is not a latest Heimdal version, the new one was released while I was working on the update. I will update it to 1.5.2 soon, as it fixes some important bugs and security issues. Notes: svn path=/head/; revision=233294
| * - Flatten the vendor heimdal tree.Stanislav Sedov2011-09-2941-16956/+0
| | | | | | | | Notes: svn path=/vendor-crypto/heimdal/dist/; revision=225864
* | Fix conflicts after heimdal-1.1 import and add build infrastructure. ImportDoug Rabson2008-05-071-9/+10
| | | | | | | | | | | | | | all non-style changes made by heimdal to our own libgssapi. Notes: svn path=/head/; revision=178828
* | This commit was generated by cvs2svn to compensate for changes in r178825,Doug Rabson2008-05-0740-2989/+10257
|\| | | | | | | | | | | | | which included commits to RCS files with non-trunk default branches. Notes: svn path=/head/; revision=178826
| * Vendor import of Heimdal 1.1Doug Rabson2008-05-0741-2998/+10267
| | | | | | | | Notes: svn path=/vendor-crypto/heimdal/dist/; revision=178825
* | This commit was generated by cvs2svn to compensate for changes in r142403,Jacques Vidrine2005-02-243-171/+213
|\| | | | | | | | | | | | | which included commits to RCS files with non-trunk default branches. Notes: svn path=/head/; revision=142404
| * Vendor import of Heimdal 0.6.3.vendor/heimdal/0.6.3Jacques Vidrine2005-02-243-171/+213
| | | | | | | | | | Notes: svn path=/vendor-crypto/heimdal/dist/; revision=142403 svn path=/vendor-crypto/heimdal/0.6.3/; revision=142405; tag=vendor/heimdal/0.6.3
| * Clean up the Heimdal vendor branch by removing files not included inJacques Vidrine2005-02-248-1269/+0
| | | | | | | | | | | | | | | | | | | | | | any import for several years. If memory serves, this was Suggested by: ru an awfully long time ago-- sorry for the delay! Notes: svn path=/vendor-crypto/heimdal/dist/; revision=142400
* | Resolve conflicts after import of Heimdal 0.6.1.Jacques Vidrine2004-04-035-340/+0
| | | | | | | | Notes: svn path=/head/; revision=127811
* | This commit was generated by cvs2svn to compensate for changes in r127808,Jacques Vidrine2004-04-038-207/+459
|\| | | | | | | | | | | | | which included commits to RCS files with non-trunk default branches. Notes: svn path=/head/; revision=127809
| * Vendor import of Heimdal 0.6.1.Jacques Vidrine2004-04-038-207/+459
| | | | | | | | Notes: svn path=/vendor-crypto/heimdal/dist/; revision=127808
* | This commit was generated by cvs2svn to compensate for changes in r120945,Jacques Vidrine2003-10-0916-281/+541
|\| | | | | | | | | | | | | which included commits to RCS files with non-trunk default branches. Notes: svn path=/head/; revision=120946
| * Vendor import of Heimdal 0.6.Jacques Vidrine2003-10-0916-281/+541
| | | | | | | | Notes: svn path=/vendor-crypto/heimdal/dist/; revision=120945
* | This commit was generated by cvs2svn to compensate for changes in r107207,Jacques Vidrine2002-11-248-67/+63
|\| | | | | | | | | | | | | which included commits to RCS files with non-trunk default branches. Notes: svn path=/head/; revision=107208
| * Import of Heimdal 0.5.1.Jacques Vidrine2002-11-248-67/+63
| | | | | | | | | | | | | | Approved by: re Notes: svn path=/vendor-crypto/heimdal/dist/; revision=107207
* | Resolve conflicts.Jacques Vidrine2002-09-161-6/+2
| | | | | | | | Notes: svn path=/head/; revision=103426
* | This commit was generated by cvs2svn to compensate for changes in r103423,Jacques Vidrine2002-09-163-48/+82
|\| | | | | | | | | | | | | which included commits to RCS files with non-trunk default branches. Notes: svn path=/head/; revision=103424
| * Import of Heimdal Kerberos from KTH repository circa 2002/09/16.Jacques Vidrine2002-09-164-54/+84
| | | | | | | | Notes: svn path=/vendor-crypto/heimdal/dist/; revision=103423
* | Pass the pointy hat! Remove accidently imported files.Jacques Vidrine2002-08-301-803/+0
| | | | | | | | Notes: svn path=/head/; revision=102654
* | Remove files no longer relevant after latest import.Jacques Vidrine2002-08-302-126/+0
| | | | | | | | Notes: svn path=/head/; revision=102648
* | This commit was generated by cvs2svn to compensate for changes in r102644,Jacques Vidrine2002-08-3025-370/+1322
|\| | | | | | | | | | | | | which included commits to RCS files with non-trunk default branches. Notes: svn path=/head/; revision=102645
| * Import of Heimdal Kerberos from KTH repository circa 2002/08/29.Jacques Vidrine2002-08-3025-370/+1322
| | | | | | | | Notes: svn path=/vendor-crypto/heimdal/dist/; revision=102644
* | Resolve conflicts after import of Heimdal Kerberos 2002/02/17.Jacques Vidrine2002-02-191-3/+6
| | | | | | | | Notes: svn path=/head/; revision=90929
* | This commit was generated by cvs2svn to compensate for changes in r90926,Jacques Vidrine2002-02-1914-486/+438
|\| | | | | | | | | | | | | which included commits to RCS files with non-trunk default branches. Notes: svn path=/head/; revision=90927
| * Import of Heimdal Kerberos from KTH repository circa 2002/02/17.Jacques Vidrine2002-02-1915-489/+444
| | | | | | | | Notes: svn path=/vendor-crypto/heimdal/dist/; revision=90926
* | fix merges from 0.3fAssar Westerlund2001-06-211-1/+5
| | | | | | | | Notes: svn path=/head/; revision=78536
* | This commit was generated by cvs2svn to compensate for changes in r78527,Assar Westerlund2001-06-2119-99/+548
|\| | | | | | | | | | | | | which included commits to RCS files with non-trunk default branches. Notes: svn path=/head/; revision=78528
| * import of heimdal 0.3fAssar Westerlund2001-06-2120-100/+553
| | | | | | | | Notes: svn path=/vendor-crypto/heimdal/dist/; revision=78527
* | This commit was generated by cvs2svn to compensate for changes in r76371,Assar Westerlund2001-05-085-17/+11
|\| | | | | | | | | | | | | which included commits to RCS files with non-trunk default branches. Notes: svn path=/head/; revision=76372
| * mdoc(ng) fixesAssar Westerlund2001-05-085-17/+11
| | | | | | | | | | | | | | Submitted by: ru Notes: svn path=/vendor-crypto/heimdal/dist/; revision=76371
* | fix conflicts in heimdal 0.3e importAssar Westerlund2001-02-131-0/+8
| | | | | | | | Notes: svn path=/head/; revision=72448
* | This commit was generated by cvs2svn to compensate for changes in r72445,Assar Westerlund2001-02-1324-951/+2308
|\| | | | | | | | | | | | | which included commits to RCS files with non-trunk default branches. Notes: svn path=/head/; revision=72446
| * import of heimdal 0.3eAssar Westerlund2001-02-1325-952/+2317
| | | | | | | | Notes: svn path=/vendor-crypto/heimdal/dist/; revision=72445
* | Merge conflicts.Mark Murray2000-02-241-1/+2
|/ | | | Notes: svn path=/head/; revision=57428
* Vendor import of Heimdal 0.2pvendor/heimdal/0.2pMark Murray2000-02-241-65/+47
| | | | | Notes: svn path=/vendor-crypto/heimdal/dist/; revision=57422 svn path=/vendor-crypto/heimdal/0.2p/; revision=57424; tag=vendor/heimdal/0.2p
* Vendor import of Heimdal 0.2ovendor/heimdal/0.2oMark Murray2000-02-246-57/+175
| | | | | Notes: svn path=/vendor-crypto/heimdal/dist/; revision=57419 svn path=/vendor-crypto/heimdal/0.2o/; revision=57421; tag=vendor/heimdal/0.2o
* Vendor import of Heimdal 0.2nvendor/heimdal/0.2nMark Murray2000-02-243-6/+35
| | | | | Notes: svn path=/vendor-crypto/heimdal/dist/; revision=57416 svn path=/vendor-crypto/heimdal/0.2n/; revision=57418; tag=vendor/heimdal/0.2n
* Import KTH Heimdal, which will be the core of our Kerberos5.vendor/heimdal/0.2mMark Murray2000-01-0926-0/+7528
Userland to follow. Notes: svn path=/vendor-crypto/heimdal/dist/; revision=55682 svn path=/vendor-crypto/heimdal/0.2m/; revision=55684; tag=vendor/heimdal/0.2m
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