Bug 773496

Summary:	Prompter delay can cause spurious clock skew
Product:	Red Hat Enterprise Linux 6	Reporter:	Simo Sorce <ssorce>
Component:	krb5	Assignee:	Nalin Dahyabhai <nalin>
Status:	CLOSED ERRATA	QA Contact:	Zbysek MRAZ <zmraz>
Severity:	low	Docs Contact:
Priority:	low
Version:	6.3	CC:	dpal, ebenes, jplans, nalin, prc
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	krb5-1.10.3-5.el6	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:	772712	Environment:
Last Closed:	2013-02-21 08:36:57 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	772712
Bug Blocks:

Description Simo Sorce 2012-01-12 00:07:28 UTC

+++ This bug was initially created as a clone of Bug #772712 +++

This issue is evident when krb5-auth-dialog is in use when the prompter is left there hanging for a long period.

When that happen krb5libs mistakenly record a great clock skew.

The effect is that at the next kinit this clock skew is applied and kinit/k-a-d may end up asking for a ticket in the past.

See upstream Ticket #7063

--- Additional comment from ssorce on 2012-01-09 13:01:25 EST ---

Upstream ticket URL:
http://krbdev.mit.edu/rt/Ticket/Display.html?id=7063

--- Additional comment from ssorce on 2012-01-11 19:06:06 EST ---

Patch available here:
https://github.com/krb5/krb5-anonsvn/commit/2626c89efd8019853edab29c52bac951f5ba2794

Comment 2 Simo Sorce 2012-01-13 20:58:53 UTC

Description of the bug.

prerequisite: a KDC that does not require preauth and with max tgt lifetime of 8-10 hours

Current situation:

1. make sure krb5_auth_dialog is running.
2. Take a short lived ticket
3. wait until it expire and let krb5_auth_dialog pop up
4. go home
5. when you get back next day enter your password
6. klist and see the ticket is valid but expires yesterday
7. run kinit
8. klist and notice how the ticket still expire in the past
9. run kinit again
10. klist and notice how the ticket now expire according to expected time

Correct behavior:

1. make sure krb5_auth_dialog is running.
2. Take a short lived ticket
3. wait until it expire and let krb5_auth_dialog pop up
4. go get lunch
5. when you get back enter your password
6. klist and see the ticket is valid but expires yesterday
7. run kinit
8. klist and see that ticket expire at the expected time

Comment 3 RHEL Program Management 2012-07-10 08:16:30 UTC

This request was not resolved in time for the current release.
Red Hat invites you to ask your support representative to
propose this request, if still desired, for consideration in
the next release of Red Hat Enterprise Linux.

Comment 4 RHEL Program Management 2012-07-10 23:59:48 UTC

This request was erroneously removed from consideration in Red Hat Enterprise Linux 6.4, which is currently under development.  This request will be evaluated for inclusion in Red Hat Enterprise Linux 6.4.

Comment 9 errata-xmlrpc 2013-02-21 08:36:57 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHBA-2013-0319.html