Bug 1161073
Summary: | sshd sets KRB5CCNAME environment variable with a truncated value | ||||||
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Product: | [Fedora] Fedora | Reporter: | ams | ||||
Component: | openssh | Assignee: | Petr Lautrbach <plautrba> | ||||
Status: | CLOSED ERRATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> | ||||
Severity: | unspecified | Docs Contact: | |||||
Priority: | unspecified | ||||||
Version: | 20 | CC: | mattias.ellert, mgrepl, plautrba, tmraz | ||||
Target Milestone: | --- | ||||||
Target Release: | --- | ||||||
Hardware: | All | ||||||
OS: | All | ||||||
Whiteboard: | |||||||
Fixed In Version: | openssh-6.4p1-6.fc20 | Doc Type: | Bug Fix | ||||
Doc Text: | Story Points: | --- | |||||
Clone Of: | Environment: | ||||||
Last Closed: | 2014-11-15 09:23:47 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: | |||||||
Attachments: |
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Good catch, sir! Thanks for the report and the patch. It's even case for the 'default_ccache_name = KEYRING:persistent:%{uid}' openssh-6.4p1-6.fc20 has been submitted as an update for Fedora 20. https://admin.fedoraproject.org/updates/openssh-6.4p1-6.fc20 Package openssh-6.4p1-6.fc20: * should fix your issue, * was pushed to the Fedora 20 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing openssh-6.4p1-6.fc20' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2014-14849/openssh-6.4p1-6.fc20 then log in and leave karma (feedback). openssh-6.4p1-6.fc20 has been pushed to the Fedora 20 stable repository. If problems still persist, please make note of it in this bug report. |
Created attachment 954391 [details] patch that corrects the calculation of bytes for authctxt->krb5_ccname Description of problem: After logging in with ssh, kerberos ticket cache is not found due to environment variable KRB5CCNAME being truncated (missing the last 2 characters). Version-Release number of selected component (if applicable): openssh-6.4p1-5 How reproducible: Every time Steps to Reproduce: 1. login via kerberos-enabled ssh 2. 3. Actual results: `klist` cannot find credentials cache because KRB5CCNAME does not have full file path Expected results: KRB5CCNAME should contain "FILE:/path/to/credentials_cache" Additional info: The bug was introduced with 'openssh-6.3p1-krb5-use-default_ccache_name.patch' The calculation of the length (len) of authctxt->krb5_ccname is short by 2 bytes - it does not allow for the ':' or the terminating 0. """ len = strlen(authctxt->krb5_ticket_file) + strlen(ccache_type); authctxt->krb5_ccname = xmalloc(len); ... snprintf(authctxt->krb5_ccname, len, "%s:%s", ccache_type, authctxt->krb5_ticket_file); """