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Tim, this is cups needing to be able to manipulate Kerberos replay caches, specifically being able to purge expired entries from them. Dan, is cupsd_t one of the domains that can do that in the upcoming RHEL 6 builds (either directly, or as a user of PAM)?
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-2011-1511.html
Kerberos Authentication for CUPS web interface is not working when selinux is in enforcing mode. CUPS package version: cups-1.4.2-39.el6.x86_64 ------------------------------------- /var/log/cups/error_log: E [23/Aug/2011:09:14:33 -0400] cupsdAuthorize: pam_authenticate() returned 7 (Authentication failure)! ------------------------------------- AVC, confirmed to be solving the issue: type=AVC msg=audit(1314106699.568:97774): avc: denied { unlink } for pid=2553 comm="cupsd" name="host_0" dev=sda3 ino=3663569 scontext=unconfined_u:system_r:cupsd_t:s0-s0:c0.c1023 tcontext=system_u:object_r:user_tmp_t:s0 tclass=file type=SYSCALL msg=audit(1314106699.568:97774): arch=c000003e syscall=87 success=no exit=-13 a0=7f1ce094a8b0 a1=ffffffff a2=0 a3=10 items=0 ppid=1 pid=2553 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=2076 comm="cupsd" exe="/usr/sbin/cupsd" subj=unconfined_u:system_r:cupsd_t:s0-s0:c0.c1023 key=(null) type=USER_AUTH msg=audit(1314106701.647:97775): user pid=2553 uid=0 auid=0 ses=2076 subj=unconfined_u:system_r:cupsd_t:s0-s0:c0.c1023 msg='op=PAM:authentication acct="jmontleo" exe="/usr/sbin/cupsd" hostname=10.11.131.75 addr=10.11.131.75 terminal=cups res=failed' module cupsauth 1.0; require { type user_tmp_t; type cupsd_t; class file unlink; } #============= cupsd_t ============== allow cupsd_t user_tmp_t:file unlink;