Bug 1129244
| Summary: | KDC locator is misbehaving when only master_kdc is specified in krb5.conf | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Petr Spacek <pspacek> |
| Component: | krb5 | Assignee: | Roland Mainz <rmainz> |
| Status: | CLOSED EOL | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 20 | CC: | dpal, nalin, nathaniel, rharwood, rmainz |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2015-06-29 22:02:22 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
Note: This happens on machine *without* SSSD. AFAIK the kinit error message should be changed to include the KDC name to provide better diagnostics, e.g. change from... -- snip -- kinit: Cannot find KDC for requested realm while renewing credentials -- snip -- ... to ... -- snip -- kinit: Cannot find KDC 'chickenmonster.edu' for requested realm while renewing credentials -- snip -- (in your case the string would've been empty to indicate that no KDC name was found) This package has changed ownership in the Fedora Package Database. Reassigning to the new owner of this component. This message is a reminder that Fedora 20 is nearing its end of life. Approximately 4 (four) weeks from now Fedora will stop maintaining and issuing updates for Fedora 20. It is Fedora's policy to close all bug reports from releases that are no longer maintained. At that time this bug will be closed as EOL if it remains open with a Fedora 'version' of '20'. Package Maintainer: If you wish for this bug to remain open because you plan to fix it in a currently maintained version, simply change the 'version' to a later Fedora version. Thank you for reporting this issue and we are sorry that we were not able to fix it before Fedora 20 is end of life. If you would still like to see this bug fixed and are able to reproduce it against a later version of Fedora, you are encouraged change the 'version' to a later Fedora version prior this bug is closed as described in the policy above. Although we aim to fix as many bugs as possible during every release's lifetime, sometimes those efforts are overtaken by events. Often a more recent Fedora release includes newer upstream software that fixes bugs or makes them obsolete. Fedora 20 changed to end-of-life (EOL) status on 2015-06-23. Fedora 20 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. If you are unable to reopen this bug, please file a new report against the current release. If you experience problems, please add a comment to this bug. Thank you for reporting this bug and we are sorry it could not be fixed. |
Description of problem: Kerberos library behaves strangely in case where krb5.conf defines only "master_kdc" without "kdc". Please see steps to preproduce. Version-Release number of selected component (if applicable): krb5-libs-1.11.5-10.fc20.x86_64 How reproducible: 100 % Steps to Reproduce: Define following krb5.conf: [realms] IPA.EXAMPLE = { master_kdc = vm-108.ipa.example.:88 admin_server = vm-108.ipa.example.:749 default_domain = ipa.example } And try following commands. I'm using environment variable KRB5_TRACE=/dev/stdout to get some debug information. $ kinit -kt /etc/named.keytab DNS/pspacek.ipa.example This works as expected, i.e. contacts KDC vm-108.ipa.example and obtains TGT. All further attempts to get service tickets or renew TGT fail: $ kinit -R -kt /etc/named.keytab DNS/pspacek.ipa.example kinit -R DNS/pspacek.brq.redhat.com Using default cache: /tmp/krb5cc_0 Using principal: DNS/pspacek.brq.redhat.com [4464] 1407842478.143475: Retrieving DNS/pspacek.brq.redhat.com -> krbtgt/IPA.EXAMPLE from FILE:/tmp/krb5cc_0 with result: 0/Success [4464] 1407842478.143518: Get cred via TGT krbtgt/IPA.EXAMPLE after requesting krbtgt/IPA.EXAMPLE (canonicalize off) [4464] 1407842478.143598: Generated subkey for TGS request: aes256-cts/2203 [4464] 1407842478.143725: etypes requested in TGS request: aes256-cts, aes128-cts, des3-cbc-sha1, rc4-hmac, camellia128-cts, camellia256-cts [4464] 1407842478.144055: Encoding request body and padata into FAST request [4464] 1407842478.144219: Sending request (975 bytes) to IPA.EXAMPLE [4464] 1407842478.144356: Got cred; -1765328230/Cannot find KDC for requested realm kinit: Cannot find KDC for requested realm while renewing credentials $ kvno ldap/vm-108.ipa.example kvno ldap/vm-108.ipa.example [4485] 1407842533.699452: Getting credentials DNS/pspacek.brq.redhat.com -> ldap/vm-108.ipa.example using ccache FILE:/tmp/krb5cc_0 [4485] 1407842533.699864: Retrieving DNS/pspacek.brq.redhat.com -> ldap/vm-108.ipa.example from FILE:/tmp/krb5cc_0 with result: -1765328243/Matching credential not found [4485] 1407842533.700055: Retrieving DNS/pspacek.brq.redhat.com -> krbtgt/IPA.EXAMPLE from FILE:/tmp/krb5cc_0 with result: 0/Success [4485] 1407842533.700086: Found cached TGT for service realm: DNS/pspacek.brq.redhat.com -> krbtgt/IPA.EXAMPLE [4485] 1407842533.700108: Requesting tickets for ldap/vm-108.ipa.example, referrals on [4485] 1407842533.700171: Generated subkey for TGS request: aes256-cts/6C96 [4485] 1407842533.700267: etypes requested in TGS request: aes256-cts, aes128-cts, des3-cbc-sha1, rc4-hmac, camellia128-cts, camellia256-cts [4485] 1407842533.700497: Encoding request body and padata into FAST request [4485] 1407842533.700626: Sending request (986 bytes) to IPA.EXAMPLE kvno: Cannot find KDC for requested realm while getting credentials for ldap/vm-108.ipa.example Actual results: It is hard to debug because it works partially, i.e. only for plain kinit but not for any further operation. Expected results: It should fail /or/ work in all cases. Also, maybe the error message could be clearer. Roland had some ideas how to improve it. Additional info: Everything works fine when I add 'kdc' definition to krb5.conf.