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On 01/08/2013 05:12 PM, m.roth@xxxxxxxxx wrote:
> Daniel J Walsh wrote:
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>>
>> On 01/08/2013 05:04 PM, m.roth@xxxxxxxxx wrote:
>>> Daniel J Walsh wrote:
>>>> On 01/08/2013 01:57 PM, m.roth@xxxxxxxxx wrote:
>>>>> Is this a bug? It's certainly a real inconsistancy, IMO.
>>>>>
>>>>> I just built a user's workstation, new, as fc-17.
>>>>>
>>>>> ll -Z /usr/sbin/sshd -rwxr-xr-x. root root
>>>>> system_u:object_r:sshd_exec_t:s0 /usr/sbin/sshd*
>>>>>
>>>>> ll -Z /etc/ssh/ drwxr-xr-x. root root system_u:object_r:etc_t:s0
>>>>> ./ drwxr-xr-x. root root system_u:object_r:etc_t:s0 ../
>>>>> -rw-------. root root system_u:object_r:etc_t:s0 moduli
>>>>> -rw-r--r--. root root system_u:system_u:etc_t:s0 ssh_config
>>>>> -rw-------. root root system_u:system_u:etc_t:s0 sshd_config
>>>>> -rw-------. root root system_u:system_u:etc_t:s0
>>>>> sshd_config.rpmnew -rw-------. root root
>>>>> system_u:system_u:sshd_key_t:s0 ssh_host_dsa_key -rw-r--r--. root
>>>>> root system_u:system_u:sshd_key_t:s0 ssh_host_dsa_key.pub
>>>>> -rw-------. root root system_u:system_u:sshd_key_t:s0 ssh_host_key
>>>>> -rw-r--r--. root root system_u:system_u:sshd_key_t:s0
>>>>> ssh_host_key.pub -rw-------. root root
>>>>> system_u:system_u:sshd_key_t:s0 ssh_host_rsa_key -rw-r--r--. root
>>>>> root system_u:system_u:sshd_key_t:s0 ssh_host_rsa_key.pub
>>>>> -rw-r--r--. root root system_u:system_u:etc_t:s0
>>>>> ssh_known_hosts
>>>>>
>>>>> sealert tells me that the ssh_host_*_key should be etc_t, not, as
>>>>> I set it, sshd_key_t.
>>>>>
>>>> What does matchpathcon /etc/ssh/ssh_host*
>>>>
>>>> Say?
>>> <snip> matchpathcon /etc/ssh/ssh_host* /etc/ssh/ssh_host_dsa_key
>>> system_u:object_r:sshd_key_t:s0 /etc/ssh/ssh_host_dsa_key.pub
>>> system_u:object_r:sshd_key_t:s0 /etc/ssh/ssh_host_key
>>> system_u:object_r:sshd_key_t:s0 /etc/ssh/ssh_host_key.pub
>>> system_u:object_r:sshd_key_t:s0 /etc/ssh/ssh_host_rsa_key
>>> system_u:object_r:sshd_key_t:s0 /etc/ssh/ssh_host_rsa_key.pub
>>> system_u:object_r:sshd_key_t:s0
>>>
>> can you attach the sealert message?
>
> SELinux is preventing /usr/sbin/sshd from getattr access on the file
> /etc/ssh/ss h_host_rsa_key.
>
> ***** Plugin restorecon (94.8 confidence) suggests
> *************************
>
> If you want to fix the label. /etc/ssh/ssh_host_rsa_key default label
> should be etc_t. Then you can run restorecon. Do # /sbin/restorecon -v
> /etc/ssh/ssh_host_rsa_key
>
> ***** Plugin catchall_labels (5.21 confidence) suggests
> ********************
>
> If you want to allow sshd to have getattr access on the ssh_host_rsa_key
> file Then you need to change the label on /etc/ssh/ssh_host_rsa_key Do #
> semanage fcontext -a -t FILE_TYPE '/etc/ssh/ssh_host_rsa_key' where
> FILE_TYPE is one of the following: oddjob_mkhomedir_exec_t, rpm_script_tmp
> _t, dbusd_etc_t, systemd_systemctl_exec_t, sshd_exec_t, fusermount_exec_t,
> secur ity_t, ld_so_cache_t, faillog_t, abrt_var_cache_t, pam_exec_t,
> lastlog_t, passwd _file_t, nx_server_home_ssh_t, proc_net_t,
> sosreport_tmp_t, machineid_t, rssh_ro _t, cfengine_var_log_t, proc_afs_t,
> krb5_conf_t, chkpwd_exec_t, rpm_tmp_t, etc_r untime_t, condor_var_lib_t,
> updpwd_exec_t, openct_var_run_t, abrt_var_run_t, user_home_type,
> configfile, initrc_var_run_t, domain, initrc_tmp_t, pcscd_var_run_t ,
> samba_etc_t, sshd_var_run_t, user_cron_spool_t, pam_var_run_t,
> shutdown_exec_t , ssh_home_t, exec_type, sysctl_crypto_t, user_tmp_type,
> systemd_logind_var_run_ t, sysctl_kernel_t, samba_var_t,
> mount_ecryptfs_exec_t, local_login_home_t, syst em_dbusd_var_lib_t,
> samba_etc_t, systemd_logind_sessions_t, net_conf_t, user_tmp _t,
> selinux_config_t, logfile, gitosis_var_lib_t, sshd_tmpfs_t,
> openshift_tmp_t, default_context_t, mail_spool_t, rlogind_home_t,
> locale_t, nx_server_exec_t, va r_auth_t, cgroup_t, etc_t, ld_so_t, abrt_t,
> bin_t, proc_t, cert_t, sysfs_t, init _t, lib_t, user_home_t, krb5_keytab_t,
> sshd_t, usr_t, wtmp_t, cpu_online_t, abrt _helper_exec_t, user_tmp_t,
> login_exec_t, auth_home_t, sshd_keytab_t, xauth_exec _t, auth_cache_t,
> tmpfile, etc_t, selinux_login_config_t, ecryptfs_t, cert_t, pu ppet_tmp_t,
> screen_exec_t, fail2ban_var_lib_t, mount_exec_t, shell_exec_t, ssh_a
> gent_exec_t, textrel_shlib_t, krb5_home_t, passwd_exec_t, crack_db_t,
> rssh_exec_ t, ssh_home_t, sshd_key_t, krb5_conf_t, sssd_public_t,
> security_t, file_context_ t, root_t, krb5_host_rcache_t, nfs_t,
> krb5_host_rcache_t, shell_exec_t. Then execute: restorecon -v
> '/etc/ssh/ssh_host_rsa_key'
>
>
> ***** Plugin catchall (1.44 confidence) suggests
> ***************************
>
> If you believe that sshd should be allowed getattr access on the
> ssh_host_rsa_ke y 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 sshd /var/log/audit/audit.log |
> audit2allow -M mypol # semodule -i mypol.pp
>
>
> Additional Information: Source Context
> system_u:system_r:sshd_t:s0-s0:c0.c1023 Target Context
> system_u:object_r:unlabeled_t:s0 Target Objects
> /etc/ssh/ssh_host_rsa_key [ file ] Source sshd
> Source Path /usr/sbin/sshd Port
> <Unknown> Host example.com Source RPM Packages
> openssh-server-5.9p1-28.fc17.x86_64 Target RPM Packages Policy RPM
> selinux-policy-3.10.0-166.fc17.noarch Selinux Enabled True
> Policy Type targeted Enforcing Mode
> Permissive Host Name example.com Platform
> Linux example.com 3.6.11-1.fc17.x86_64 #1 SMP Mon Dec 17 22:16:35 UTC 2012
> x86_64 x86_64 Alert Count 22 First Seen
> 2013-01-07 17:19:53 EST Last Seen 2013-01-08 12:46:46
> EST Local ID 99e7ca06-e6f8-4fe2-9440-13c11c062525
>
> Raw Audit Messages type=AVC msg=audit(1357667206.325:709): avc: denied {
> getattr } for pid=3470 comm="sshd" path="/etc/ssh/ssh_host_rsa_key"
> dev="sda3" ino=11372820 scontext=sy stem_u:system_r:sshd_t:s0-s0:c0.c1023
> tcontext=system_u:object_r:unlabeled_t:s0 tclass=file
>
> type=SYSCALL msg=audit(1357667206.325:709): arch=x86_64 syscall=fstat
> success=ye s exit=0 a0=3 a1=7fff34871680 a2=7fff34871680 a3=10 items=0
> ppid=862 pid=3470 au id=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0
> sgid=0 fsgid=0 tty=(none) ses=4294967295 comm=sshd exe=/usr/sbin/sshd
> subj=system_u:system_r:sshd_t:s0-s0 :c0.c1023 key=(null) Hash:
> sshd,sshd_t,unlabeled_t,file,getattr
>
> audit2allow
>
> #============= sshd_t ============== allow sshd_t unlabeled_t:file
> getattr;
>
> audit2allow -R
>
> #============= sshd_t ============== allow sshd_t unlabeled_t:file
> getattr;
>
>
> -- selinux mailing list selinux@xxxxxxxxxxxxxxxxxxxxxxx
> https://admin.fedoraproject.org/mailman/listinfo/selinux
>
Well it was correct about relabeling the file to something other then
unlabeled_t, but the alert saying it should be etc_t is broken.
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