Description of problem:
The alert came as soon as I logged in to the desktop.
SELinux is preventing /usr/libexec/gdm-session-worker from 'entrypoint' accesses on the file /usr/lib64/security/pam_krb5/pam_krb5_cchelper.

*****  Plugin catchall (100. confidence) suggests  ***************************

If you believe that gdm-session-worker should be allowed entrypoint access on the pam_krb5_cchelper file by default.
Then you should report this as a bug.
You can generate a local policy module to allow this access.
Do
allow this access for now by executing:
# grep gdm-session-wor /var/log/audit/audit.log | audit2allow -M mypol
# semodule -i mypol.pp

Additional Information:
Source Context                staff_u:staff_r:staff_t:s0-s0:c0.c1023
Target Context                system_u:object_r:lib_t:s0
Target Objects                /usr/lib64/security/pam_krb5/pam_krb5_cchelper [
                              file ]
Source                        gdm-session-wor
Source Path                   /usr/libexec/gdm-session-worker
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           gdm-3.6.2-5.fc18.x86_64
Target RPM Packages           pam_krb5-2.4.1-1.fc18.x86_64
Policy RPM                    selinux-policy-3.11.1-79.fc18.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 3.7.9-201.fc18.x86_64 #1 SMP Mon
                              Feb 18 21:07:56 UTC 2013 x86_64 x86_64
Alert Count                   1
First Seen                    2013-02-25 10:34:33 EST
Last Seen                     2013-02-25 10:34:33 EST
Local ID                      28cbee3f-4b55-4967-a800-6c37f5105e6b

Raw Audit Messages
type=AVC msg=audit(1361806473.858:97): avc:  denied  { entrypoint } for  pid=1260 comm="gdm-session-wor" path="/usr/lib64/security/pam_krb5/pam_krb5_cchelper" dev="dm-0" ino=3801106 scontext=staff_u:staff_r:staff_t:s0-s0:c0.c1023 tcontext=system_u:object_r:lib_t:s0 tclass=file


type=SYSCALL msg=audit(1361806473.858:97): arch=x86_64 syscall=execve success=no exit=EACCES a0=f9f1a0 a1=7fffac2ece80 a2=7fffac2f19f8 a3=7f26481267f8 items=0 ppid=1248 pid=1260 auid=11892 uid=11892 gid=11892 euid=11892 suid=11892 fsuid=11892 egid=11892 sgid=11892 fsgid=11892 ses=2 tty=(none) comm=gdm-session-wor exe=/usr/libexec/gdm-session-worker subj=system_u:system_r:xdm_t:s0-s0:c0.c1023 key=(null)

Hash: gdm-session-wor,staff_t,lib_t,file,entrypoint

audit2allow

#============= staff_t ==============
allow staff_t lib_t:file entrypoint;

audit2allow -R

#============= staff_t ==============
allow staff_t lib_t:file entrypoint;


Additional info:
hashmarkername: setroubleshoot
kernel:         3.7.9-201.fc18.x86_64
type:           libreport