[Freeipa-users] SELinux errors with sssd-krb5-common-1.13.0-40.el7_2.12.x86_64
Sumit Bose
sbose at redhat.com
Fri Sep 30 07:30:30 UTC 2016
On Thu, Sep 29, 2016 at 12:07:13PM -0400, Prasun Gera wrote:
> I need to set SELinux to enforcing to get the relevant SSSD logs, right ?
yes, I think this would help to identify the operation which triggers
the AVC because it should fail.
bye,
Sumit
>
> On Thu, Sep 29, 2016 at 3:42 AM, Sumit Bose <sbose at redhat.com> wrote:
>
> > On Thu, Sep 29, 2016 at 12:47:34AM -0400, Prasun Gera wrote:
> > > I started seeing some selinux errors on one of my RHEL 7 clients recently
> > > (possibly after a recent yum update ?), which prevents users from logging
> > > in with passwords. I've put SELinux in permissive mode for now. Logs
> > follow
> >
> > This sounds like https://bugzilla.redhat.com/show_bug.cgi?id=1301686 .
> > Would you mind adding your findings and the SSSD logs as described in
> > https://bugzilla.redhat.com/show_bug.cgi?id=1301686#c2 to the bugzilla
> > ticket.
> >
> > Thank you.
> >
> > bye,
> > Sumit
> >
> > >
> > >
> > > SELinux is preventing /usr/libexec/sssd/krb5_child from read access on
> > the
> > > key Unknown.
> > >
> > > ***** Plugin catchall (100. confidence) suggests
> > > **************************
> > >
> > > If you believe that krb5_child should be allowed read access on the
> > Unknown
> > > key 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 krb5_child /var/log/audit/audit.log | audit2allow -M mypol
> > > # semodule -i mypol.pp
> > >
> > >
> > > Additional Information:
> > > Source Context system_u:system_r:sssd_t:s0
> > > Target Context system_u:system_r:unconfined_service_t:s0
> > > Target Objects Unknown [ key ]
> > > Source krb5_child
> > > Source Path /usr/libexec/sssd/krb5_child
> > > Port <Unknown>
> > > Host <Unknown>
> > > Source RPM Packages sssd-krb5-common-1.13.0-40.el7_2.12.x86_64
> > > Target RPM Packages
> > > Policy RPM selinux-policy-3.13.1-60.el7_2.9.noarch
> > > Selinux Enabled True
> > > Policy Type targeted
> > > Enforcing Mode Permissive
> > > Host Name example.com
> > > Platform Linux example.com 4.4.19-1.el7.x86_64
> > > #1 SMP Mon Aug 29 18:38:32 EDT 2016 x86_64
> > > x86_64
> > > Alert Count 38
> > > First Seen 2016-09-28 18:37:43 EDT
> > > Last Seen 2016-09-28 22:08:41 EDT
> > > Local ID aa5271fa-f708-46b0-a382-fb1f90ce8973
> > > Raw Audit Messages
> > > type=AVC msg=audit(1475114921.376:90787): avc: denied { read } for
> > > pid=8272 comm="krb5_child" scontext=system_u:system_r:sssd_t:s0
> > > tcontext=system_u:system_r:unconfined_service_t:s0 tclass=key
> > permissive=0
> > >
> > >
> > > type=SYSCALL msg=audit(1475114921.376:90787): arch=x86_64 syscall=keyctl
> > > success=yes exit=EINTR a0=b a1=333b5463 a2=0 a3=0 items=0 ppid=891
> > pid=8272
> > > auid=4294967295 uid=1388200053 gid=1388200053 euid=1388200053
> > > suid=1388200053 fsuid=1388200053 egid=1388200053 sgid=1388200053
> > > fsgid=1388200053 tty=(none) ses=4294967295 comm=krb5_child
> > > exe=/usr/libexec/sssd/krb5_child subj=system_u:system_r:sssd_t:s0
> > key=(null)
> > >
> > > Hash: krb5_child,sssd_t,unconfined_service_t,key,read
> > >
> > > ------------------------------------------------------------
> > --------------------
> > >
> > > SELinux is preventing /usr/libexec/sssd/krb5_child from view access on
> > the
> > > key Unknown.
> > >
> > > ***** Plugin catchall (100. confidence) suggests
> > > **************************
> > >
> > > If you believe that krb5_child should be allowed view access on the
> > Unknown
> > > key 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 krb5_child /var/log/audit/audit.log | audit2allow -M mypol
> > > # semodule -i mypol.pp
> > >
> > >
> > > Additional Information:
> > > Source Context system_u:system_r:sssd_t:s0
> > > Target Context system_u:system_r:unconfined_service_t:s0
> > > Target Objects Unknown [ key ]
> > > Source krb5_child
> > > Source Path /usr/libexec/sssd/krb5_child
> > > Port <Unknown>
> > > Host <Unknown>
> > > Source RPM Packages sssd-krb5-common-1.13.0-40.el7_2.12.x86_64
> > > Target RPM Packages
> > > Policy RPM selinux-policy-3.13.1-60.el7_2.9.noarch
> > > Selinux Enabled True
> > > Policy Type targeted
> > > Enforcing Mode Permissive
> > > Host Name example.com
> > > Platform Linux example.com 4.4.19-1.el7.x86_64
> > > #1 SMP Mon Aug 29 18:38:32 EDT 2016 x86_64
> > > x86_64
> > > Alert Count 10
> > > First Seen 2016-09-28 18:40:00 EDT
> > > Last Seen 2016-09-28 22:08:41 EDT
> > > Local ID 22ec0970-9447-444a-9631-69749e4e7226
> > > Raw Audit Messages
> > > type=AVC msg=audit(1475114921.376:90789): avc: denied { view } for
> > > pid=8272 comm="krb5_child" scontext=system_u:system_r:sssd_t:s0
> > > tcontext=system_u:system_r:unconfined_service_t:s0 tclass=key
> > permissive=0
> > >
> > >
> > > type=SYSCALL msg=audit(1475114921.376:90789): arch=x86_64 syscall=keyctl
> > > success=no exit=EACCES a0=6 a1=2e1c07f1 a2=0 a3=0 items=0 ppid=891
> > pid=8272
> > > auid=4294967295 uid=1388200053 gid=1388200053 euid=1388200053
> > > suid=1388200053 fsuid=1388200053 egid=1388200053 sgid=1388200053
> > > fsgid=1388200053 tty=(none) ses=4294967295 comm=krb5_child
> > > exe=/usr/libexec/sssd/krb5_child subj=system_u:system_r:sssd_t:s0
> > key=(null)
> > >
> > > Hash: krb5_child,sssd_t,unconfined_service_t,key,view
> > >
> > > ------------------------------------------------------------
> > --------------------
> > >
> > > SELinux is preventing /usr/libexec/sssd/krb5_child from write access on
> > the
> > > key Unknown.
> > >
> > > ***** Plugin catchall (100. confidence) suggests
> > > **************************
> > >
> > > If you believe that krb5_child should be allowed write access on the
> > > Unknown key 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 krb5_child /var/log/audit/audit.log | audit2allow -M mypol
> > > # semodule -i mypol.pp
> > >
> > >
> > > Additional Information:
> > > Source Context system_u:system_r:sssd_t:s0
> > > Target Context system_u:system_r:unconfined_service_t:s0
> > > Target Objects Unknown [ key ]
> > > Source krb5_child
> > > Source Path /usr/libexec/sssd/krb5_child
> > > Port <Unknown>
> > > Host <Unknown>
> > > Source RPM Packages sssd-krb5-common-1.13.0-40.el7_2.12.x86_64
> > > Target RPM Packages
> > > Policy RPM selinux-policy-3.13.1-60.el7_2.9.noarch
> > > Selinux Enabled True
> > > Policy Type targeted
> > > Enforcing Mode Permissive
> > > Host Name example.com
> > > Platform Linux example.com 4.4.19-1.el7.x86_64
> > > #1 SMP Mon Aug 29 18:38:32 EDT 2016 x86_64
> > > x86_64
> > > Alert Count 10
> > > First Seen 2016-09-28 18:40:00 EDT
> > > Last Seen 2016-09-28 22:08:41 EDT
> > > Local ID 8982bbec-38db-485b-9266-57fdaa8a3621
> > >
> > > Raw Audit Messages
> > > type=AVC msg=audit(1475114921.376:90790): avc: denied { write } for
> > > pid=8272 comm="krb5_child" scontext=system_u:system_r:sssd_t:s0
> > > tcontext=system_u:system_r:unconfined_service_t:s0 tclass=key
> > permissive=0
> > >
> > > type=SYSCALL msg=audit(1475114921.376:90790): arch=x86_64
> > syscall=add_key
> > > success=no exit=EACCES a0=7f6987905ffc a1=7ffeed78b1f0 a2=0 a3=0 items=0
> > > ppid=891 pid=8272 auid=4294967295 uid=1388200053 gid=1388200053
> > > euid=1388200053 suid=1388200053 fsuid=1388200053 egid=1388200053
> > > sgid=1388200053 fsgid=1388200053 tty=(none) ses=4294967295
> > comm=krb5_child
> > > exe=/usr/libexec/sssd/krb5_child subj=system_u:system_r:sssd_t:s0
> > key=(null)
> > >
> > > Hash: krb5_child,sssd_t,unconfined_service_t,key,write
> >
> > > --
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> > > Go to http://freeipa.org for more info on the project
> >
> > --
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> >
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