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Bug 1694132 - [RFE] GSS_C_DELEG_FLAG support [NEEDINFO]
Summary: [RFE] GSS_C_DELEG_FLAG support
Keywords:
Status: NEW
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: krb5
Version: 6.1
Hardware: Unspecified
OS: Linux
unspecified
medium
Target Milestone: rc
: ---
Assignee: Robbie Harwood
QA Contact: BaseOS QE Security Team
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2019-03-29 15:15 UTC by toasty
Modified: 2019-04-15 15:03 UTC (History)
7 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed:
Target Upstream Version:
rharwood: needinfo? (afarley)


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Description toasty 2019-03-29 15:15:15 UTC
Description of problem:
We have a client-server system that uses Kerberos for authentication.  When Kerberos Constrained Delegation is enabled, gss_accept_sec_context() is not returning the GSS_C_DELEG_FLAG to indicate we have a delegated credential for the client-user.  The client-user's delegated/proxy credential is need to access any downstream Kerberos protected resources, such as Hadoop.  The client can be a web browser or one of our thick clients, which are running on Windows, accessing our server-tier running on RHEL.

Version-Release number of selected component (if applicable):
Red Hat Enterprise Linux Server release 6.1 (Santiago)
krb5-libs.x86_64                      1.9-9.el6
I also tried MIT Kerberos 1.10.3 and it had the same problem

RHEL 7 is working correctly with these Kerberos libraries:
Red Hat Enterprise Linux Server release 7.2 (Maipo)
krb5-libs.x86_64                   1.14.1-27.el7_3
Red Hat Enterprise Linux Server release 7.4 (Maipo)
krb5-libs.x86_64                   1.15.1-8.el7 

How reproducible:
Reproducing requires some type of client server system configured for Kerberos and Constrained Delegation enabled in Active Directory.

Actual Results:
gss_accept_sec_context() is called to accept the inbound client-users token are part of the Kerberos handshake.  On acceptance the GSS_C_DELEG_FLAG is not being returned.

Expected Results:
gss_accept_sec_context() should be returning the GSS_C_DELEG_FLAG when Constrained Delegation is enabled.

Additional info:
I *think* this ticket resolved the problem in 1.11
http://krbdev.mit.edu/rt/Ticket/Display.html?id=7356


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