F12: /var/run/utmp
Daniel B. Thurman
dant at cdkkt.com
Tue Mar 30 16:00:43 UTC 2010
On 03/29/2010 05:59 AM, Daniel J Walsh wrote:
> On 03/28/2010 03:16 PM, Daniel B. Thurman wrote:
>> I am not sure what to make of this, so how can I fix it:
>>
>> ===================================
>> Summary:
>>
>> SELinux is preventing /usr/bin/uptime from using potentially mislabeled
>> files
>> /var/run/utmp.
>>
>> Detailed Description:
>>
>> [SELinux is in permissive mode. This access was not denied.]
>>
>> SELinux has denied the uptime access to potentially mislabeled files
>> /var/run/utmp. This means that SELinux will not allow httpd to use these
>> files.
>> If httpd should be allowed this access to these files you should change
>> the file
>> context to one of the following types, abrt_helper_exec_t,
>> httpd_helper_exec_t,
>> dbusd_etc_t, httpd_squirrelmail_t, httpd_php_exec_t,
>> httpd_nagios_htaccess_t,
>> textrel_shlib_t, rpm_script_tmp_t, samba_var_t, ld_so_t, net_conf_t,
>> public_content_t, sysctl_kernel_t, httpd_modules_t, rpm_tmp_t,
>> httpd_suexec_exec_t, application_exec_type, httpd_nutups_cgi_htaccess_t,
>> mailman_cgi_exec_t, gitosis_var_lib_t, httpd_squid_htaccess_t,
>> httpd_munin_htaccess_t, etc_runtime_t, mailman_archive_t,
>> httpd_var_lib_t,
>> httpd_var_run_t, bin_t, cert_t, ld_so_cache_t, httpd_t,
>> fail2ban_var_lib_t,
>> lib_t, httpd_awstats_htaccess_t, httpd_user_htaccess_t, usr_t,
>> chroot_exec_t,
>> httpd_rotatelogs_exec_t, public_content_rw_t, httpd_bugzilla_htaccess_t,
>> httpd_cobbler_htaccess_t, nagios_etc_t, nagios_log_t, sssd_public_t,
>> mailman_data_t, httpd_keytab_t, httpd_apcupsd_cgi_htaccess_t,
>> system_dbusd_var_lib_t, httpd_cvs_htaccess_t, httpd_git_htaccess_t,
>> httpd_sys_htaccess_t, squirrelmail_spool_t, cluster_conf_t,
>> httpd_prewikka_htaccess_t, fonts_cache_t, httpd_exec_t, httpd_lock_t,
>> httpd_log_t, logfile, httpd_rw_content, krb5_conf_t, locale_t,
>> httpd_unconfined_script_exec_t, etc_t, fonts_t, httpd_ro_content,
>> proc_t, src_t,
>> sysfs_t, calamaris_www_t, krb5_keytab_t, httpd_cache_t, httpd_tmpfs_t,
>> iso9660_t, httpd_config_t, var_lib_t, abrt_var_run_t, configfile,
>> udev_tbl_t,
>> abrt_t, httpd_tmp_t, lib_t, shell_exec_t,
>> httpd_w3c_validator_htaccess_t,
>> mysqld_etc_t, cvs_data_t, sysctl_crypto_t, httpd_bugzilla_content_ra_t,
>> httpd_bugzilla_content_rw_t, httpd_nutups_cgi_script_exec_t,
>> httpd_nagios_content_ra_t, httpd_nagios_content_rw_t,
>> httpd_nagios_content_t,
>> httpd_w3c_validator_content_t, httpd_sys_content_ra_t,
>> httpd_sys_content_rw_t,
>> httpd_sys_content_rw_t, httpd_cvs_content_ra_t, httpd_cvs_content_rw_t,
>> httpd_git_content_ra_t, httpd_git_content_rw_t,
>> httpd_cobbler_script_exec_t,
>> httpd_nutups_cgi_content_ra_t, httpd_nutups_cgi_content_rw_t,
>> httpd_git_content_t, httpd_user_content_t, httpd_squid_content_ra_t,
>> httpd_squid_content_rw_t, httpd_prewikka_content_t,
>> httpd_munin_content_t,
>> httpd_squid_content_t, httpd_awstats_script_exec_t,
>> httpd_apcupsd_cgi_content_t,
>> httpd_cobbler_content_t, httpd_apcupsd_cgi_content_ra_t,
>> httpd_apcupsd_cgi_content_rw_t, httpd_nagios_script_exec_t,
>> httpd_cvs_content_t,
>> httpd_sys_content_t, httpd_sys_content_t, root_t,
>> httpd_munin_script_exec_t,
>> httpd_w3c_validator_script_exec_t, httpd_prewikka_content_ra_t,
>> httpd_prewikka_content_rw_t, httpd_user_script_exec_t,
>> httpd_bugzilla_content_t,
>> httpd_awstats_content_ra_t, httpd_awstats_content_rw_t,
>> httpd_bugzilla_script_exec_t, httpd_apcupsd_cgi_script_exec_t,
>> httpd_squid_script_exec_t, httpd_w3c_validator_content_ra_t,
>> httpd_w3c_validator_content_rw_t, httpd_nutups_cgi_content_t,
>> httpd_awstats_content_t, httpd_sys_script_exec_t,
>> httpd_user_content_ra_t,
>> httpd_user_content_rw_t, httpd_git_script_exec_t,
>> httpd_cobbler_content_ra_t,
>> httpd_cobbler_content_rw_t, httpdcontent, httpd_cvs_script_exec_t,
>> httpd_prewikka_script_exec_t, httpd_munin_content_ra_t,
>> httpd_munin_content_rw_t. Many third party apps install html files in
>> directories that SELinux policy cannot predict. These directories
>> have to be
>> labeled with a file context which httpd can access.
>>
>> Allowing Access:
>>
>> If you want to change the file context of /var/run/utmp so that the
>> httpd daemon
>> can access it, you need to execute it using semanage fcontext -a -t
>> FILE_TYPE
>> '/var/run/utmp'.
>> where FILE_TYPE is one of the following: abrt_helper_exec_t,
>> httpd_helper_exec_t, dbusd_etc_t, httpd_squirrelmail_t,
>> httpd_php_exec_t,
>> httpd_nagios_htaccess_t, textrel_shlib_t, rpm_script_tmp_t, samba_var_t,
>> ld_so_t, net_conf_t, public_content_t, sysctl_kernel_t, httpd_modules_t,
>> rpm_tmp_t, httpd_suexec_exec_t, application_exec_type,
>> httpd_nutups_cgi_htaccess_t, mailman_cgi_exec_t, gitosis_var_lib_t,
>> httpd_squid_htaccess_t, httpd_munin_htaccess_t, etc_runtime_t,
>> mailman_archive_t, httpd_var_lib_t, httpd_var_run_t, bin_t, cert_t,
>> ld_so_cache_t, httpd_t, fail2ban_var_lib_t, lib_t,
>> httpd_awstats_htaccess_t,
>> httpd_user_htaccess_t, usr_t, chroot_exec_t, httpd_rotatelogs_exec_t,
>> public_content_rw_t, httpd_bugzilla_htaccess_t,
>> httpd_cobbler_htaccess_t,
>> nagios_etc_t, nagios_log_t, sssd_public_t, mailman_data_t,
>> httpd_keytab_t,
>> httpd_apcupsd_cgi_htaccess_t, system_dbusd_var_lib_t,
>> httpd_cvs_htaccess_t,
>> httpd_git_htaccess_t, httpd_sys_htaccess_t, squirrelmail_spool_t,
>> cluster_conf_t, httpd_prewikka_htaccess_t, fonts_cache_t, httpd_exec_t,
>> httpd_lock_t, httpd_log_t, logfile, httpd_rw_content, krb5_conf_t,
>> locale_t,
>> httpd_unconfined_script_exec_t, etc_t, fonts_t, httpd_ro_content,
>> proc_t, src_t,
>> sysfs_t, calamaris_www_t, krb5_keytab_t, httpd_cache_t, httpd_tmpfs_t,
>> iso9660_t, httpd_config_t, var_lib_t, abrt_var_run_t, configfile,
>> udev_tbl_t,
>> abrt_t, httpd_tmp_t, lib_t, shell_exec_t,
>> httpd_w3c_validator_htaccess_t,
>> mysqld_etc_t, cvs_data_t, sysctl_crypto_t, httpd_bugzilla_content_ra_t,
>> httpd_bugzilla_content_rw_t, httpd_nutups_cgi_script_exec_t,
>> httpd_nagios_content_ra_t, httpd_nagios_content_rw_t,
>> httpd_nagios_content_t,
>> httpd_w3c_validator_content_t, httpd_sys_content_ra_t,
>> httpd_sys_content_rw_t,
>> httpd_sys_content_rw_t, httpd_cvs_content_ra_t, httpd_cvs_content_rw_t,
>> httpd_git_content_ra_t, httpd_git_content_rw_t,
>> httpd_cobbler_script_exec_t,
>> httpd_nutups_cgi_content_ra_t, httpd_nutups_cgi_content_rw_t,
>> httpd_git_content_t, httpd_user_content_t, httpd_squid_content_ra_t,
>> httpd_squid_content_rw_t, httpd_prewikka_content_t,
>> httpd_munin_content_t,
>> httpd_squid_content_t, httpd_awstats_script_exec_t,
>> httpd_apcupsd_cgi_content_t,
>> httpd_cobbler_content_t, httpd_apcupsd_cgi_content_ra_t,
>> httpd_apcupsd_cgi_content_rw_t, httpd_nagios_script_exec_t,
>> httpd_cvs_content_t,
>> httpd_sys_content_t, httpd_sys_content_t, root_t,
>> httpd_munin_script_exec_t,
>> httpd_w3c_validator_script_exec_t, httpd_prewikka_content_ra_t,
>> httpd_prewikka_content_rw_t, httpd_user_script_exec_t,
>> httpd_bugzilla_content_t,
>> httpd_awstats_content_ra_t, httpd_awstats_content_rw_t,
>> httpd_bugzilla_script_exec_t, httpd_apcupsd_cgi_script_exec_t,
>> httpd_squid_script_exec_t, httpd_w3c_validator_content_ra_t,
>> httpd_w3c_validator_content_rw_t, httpd_nutups_cgi_content_t,
>> httpd_awstats_content_t, httpd_sys_script_exec_t,
>> httpd_user_content_ra_t,
>> httpd_user_content_rw_t, httpd_git_script_exec_t,
>> httpd_cobbler_content_ra_t,
>> httpd_cobbler_content_rw_t, httpdcontent, httpd_cvs_script_exec_t,
>> httpd_prewikka_script_exec_t, httpd_munin_content_ra_t,
>> httpd_munin_content_rw_t. You can look at the httpd_selinux man page for
>> additional information.
>>
>> Additional Information:
>>
>> Source Context system_u:system_r:httpd_t:s0
>> Target Context system_u:object_r:initrc_var_run_t:s0
>> Target Objects /var/run/utmp [ file ]
>> Source uptime
>> Source Path /usr/bin/uptime
>> Port<Unknown>
>> Host host.domain.com
>> Source RPM Packages procps-3.2.8-3.fc12
>> Target RPM Packages initscripts-9.02.1-1
>> Policy RPM selinux-policy-3.6.32-103.fc12
>> Selinux Enabled True
>> Policy Type targeted
>> Enforcing Mode Permissive
>> Plugin Name httpd_bad_labels
>> Host Name host.domain.com
>> Platform Linux host.domain.com
>> 2.6.32.9-70.fc12.i686 #1 SMP
>> Wed Mar 3 05:14:32 UTC 2010 i686 i686
>> Alert Count 2
>> First Seen Sun 28 Mar 2010 12:04:45 PM PDT
>> Last Seen Sun 28 Mar 2010 12:09:52 PM PDT
>> Local ID 5f9c855c-31e3-42c9-83fd-9c9b6262cd00
>> Line Numbers
>>
>> Raw Audit Messages
>>
>> node=host.domain.com type=AVC msg=audit(1269803392.422:30): avc:
>> denied { open } for pid=4900 comm="uptime" name="utmp" dev=sdb10
>> ino=206 scontext=system_u:system_r:httpd_t:s0
>> tcontext=system_u:object_r:initrc_var_run_t:s0 tclass=file
>>
>> node=host.domain.com type=SYSCALL msg=audit(1269803392.422:30):
>> arch=40000003 syscall=5 success=yes exit=4 a0=3f5cb5 a1=88000 a2=430680
>> a3=3f5cbb items=0 ppid=2613 pid=4900 auid=4294967295 uid=48 gid=489
>> euid=48 suid=48 fsuid=48 egid=489 sgid=489 fsgid=489 tty=(none)
>> ses=4294967295 comm="uptime" exe="/usr/bin/uptime"
>> subj=system_u:system_r:httpd_t:s0 key=(null)
>>
>> --
>> selinux mailing list
>> selinux at lists.fedoraproject.org
>> https://admin.fedoraproject.org/mailman/listinfo/selinux
>>
>>
>>
>
> If you want to allow apache to read the utmp file, just add the allow
> rules.
>
> # grep httpd_t /var/log/audit/audit.log | audit2allow -M myhttpd
> # semodule -i myhttpd.pp
>
> You might have to do this a couple of times. Allowing this means a
> compromised system would be able to see the users that have logged
> into a system.
>
> You can debate if this is worth preventing, but we do not want to
> allow all http servers the ability to read this file.
>
>
Hmm... seems like there is no way to get around this - is there
a reason why httpd is attempting to access this in the first place,
if so, why or why isn't this being removed or better yet, can access
be disabled via some httpd option?
I have applied the above policy, and is there a way to remove it
later? I also noticed when applying the policy, the following
appears in /var/log/messages:
Mar 30 08:53:09 host dbus: avc: received policyload notice (seqno=2)
Mar 30 08:53:09 host dbus: Can't send to audit system: USER_AVC avc:
received policyload notice (seqno=2)#012: exe="?" sauid=81 hostname=?
addr=? terminal=?
Mar 30 08:53:11 host dbus: Reloaded configuration
Still getting dbus errors?
It also happens when I use setenforce 0 or 1
Keep in mind that I have zoneminder installed but I am not
sure that this is the cause of the problem since it is not clear
what program is actually invoking the /usr/bin/uptime binary.
Thanks-
Dan
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