Attachment 210771 Details for Bug 311481 – dhclient deny resolv.conf write

dhclient deny resolv.conf write

dhclient-avc.txt (text/plain), 3.00 KB, created by Adam Pribyl on 2007-09-28 18:26:47 UTC

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Creator: Adam Pribyl

Created: 2007-09-28 18:26:47 UTC

Size: 3.00 KB

patch

obsolete

>Summary
>    SELinux is preventing dhclient-script (dhcpc_t) "write" to <Unknown>
>    (etc_t).
>
>Detailed Description
>    SELinux is preventing dhclient-script (dhcpc_t) "write" to <Unknown>
>    (etc_t). The SELinux type etc_t, is a generic type for all files in the
>    directory and very few processes (SELinux Domains) are allowed to write to
>    this SELinux type.  This type of denial usual indicates a mislabeled file.
>    By default a file created in a directory has the gets the context of the
>    parent directory, but SELinux policy has rules about the creation of
>    directories, that say if a process running in one SELinux Domain (D1)
>    creates a file in a directory with a particular SELinux File Context (F1)
>    the file gets a different File Context (F2).  The policy usually allows the
>    SELinux Domain (D1) the ability to write or append on (F2).  But if for some
>    reason a file (<Unknown>) was created with the wrong context, this domain
>    will be denied.  The usual solution to this problem is to reset the file
>    context on the target file, restorecon -v <Unknown>.  If the file context
>    does not change from etc_t, then this is probably a bug in policy.  Please
>    file a http://bugzilla.redhat.com/bugzilla/enter_bug.cgi against the
>    selinux-policy package. If it does change, you can try your application
>    again to see if it works.  The file context could have been mislabeled by
>    editing the file or moving the file from a different directory, if the file
>    keeps getting mislabeled, check the init scripts to see if they are doing
>    something to mislabel the file.
>
>Allowing Access
>    You can attempt to fix file context by executing restorecon -v <Unknown>
>
>    The following command will allow this access:
>    restorecon <Unknown>
>
>Additional Information        
>
>Source Context                system_u:system_r:dhcpc_t:s0
>Target Context                system_u:object_r:etc_t:s0
>Target Objects                None [ file ]
>Affected RPM Packages         
>Policy RPM                    selinux-policy-3.0.8-13.fc8
>Selinux Enabled               True
>Policy Type                   targeted
>MLS Enabled                   True
>Enforcing Mode                Enforcing
>Plugin Name                   plugins.mislabeled_file
>Host Name                     localhost.localdomain
>Platform                      Linux localhost.localdomain 2.6.23-0.202.rc8.fc8
>                              #1 SMP Mon Sep 24 22:09:05 EDT 2007 i686 i686
>Alert Count                   2
>First Seen                    Fri 28 Sep 2007 07:54:35 PM EDT
>Last Seen                     Fri 28 Sep 2007 07:54:35 PM EDT
>Local ID                      4c551c58-5f7f-416a-96f1-235df0f31cfb
>Line Numbers                  
>
>Raw Audit Messages            
>
>avc: denied { write } for comm=dhclient-script dev=dm-0 egid=0 euid=0
>exe=/bin/bash exit=-13 fsgid=0 fsuid=0 gid=0 items=0 name=resolv.conf pid=3058
>scontext=system_u:system_r:dhcpc_t:s0 sgid=0 subj=system_u:system_r:dhcpc_t:s0
>suid=0 tclass=file tcontext=system_u:object_r:etc_t:s0 tty=pts0 uid=0
>

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Attachments on bug 311481: 210761 | 210771