On Wednesday 30 September 2009 12:18:17 Dominick Grift wrote:
> On Wed, Sep 30, 2009 at 10:15:14AM +0100, Tony Molloy wrote:
> > Hi,
> >
> > This is Centos 5.3 fully updated.
> >
> > Im getting the following error from setroubleshoot
> >
> > SELinux is preventing samba (smbd) "unlink" to ./log.cs244-34.old
> > (samba_log_t).
> >
> > when samba tries to rotate the log files.
> >
> > Running sealert I get the following ( edited )
> >
> > Summary:
> >
> > SELinux is preventing samba (smbd) "unlink" to ./log.cs244-24.old
> > (samba_log_t).
> >
> > Detailed Description:
> >
> > SELinux denied samba access to ./log.cs244-24.old. If you want to share
> > this directory with samba it has to have a file context label of
> > samba_share_t. If ^^^^^^^^^^^^^
> > you did not intend to use ./log.cs244-24.old as a samba repository it
> > could indicate either a bug or it could signal a intrusion attempt.
> >
> > Allowing Access:
> >
> > You can alter the file context by executing chcon -R -t samba_share_t
> > './log.cs244-24.old' You must also change the default file context files
> > on the
> > system in order to preserve them even on a full relabel. "semanage
> > fcontext -a -t samba_share_t './log.cs244-24.old'"
> >
> > The following command will allow this access:
> >
> > chcon -R -t samba_share_t './log.cs244-24.old'
> >
> > Additional Information:
> >
> > Source Context root:system_r:smbd_t
> > Target Context root:object_r:samba_log_t
> > Target Objects ./log.cs244-24.old [ file ]
> > Source smbd
> > Source Path /usr/sbin/smbd
> > Port <Unknown>
> > Host janus.x.y.z
> > Source RPM Packages samba-3.0.33-3.7.el5_3.1
> > Target RPM Packages
> > Policy RPM selinux-policy-2.4.6-203.el5
> > Selinux Enabled True
> > Policy Type targeted
> > MLS Enabled True
> > Enforcing Mode Enforcing
> > Plugin Name samba_share
> > Host Name janus.x.y.z
> > Platform Linux janus.x.y.z 2.6.18-128.7.1.el5 #1 SMP
> > Mon Aug 24 08:21:56 EDT 2009 x86_64 x86_64
> > Alert Count 53
> > First Seen Fri Sep 25 15:54:24 2009
> > Last Seen Tue Sep 29 15:55:25 2009
> > Local ID e4426abc-3b0b-4df2-a380-3f0fba344c63
> > Line Numbers
> >
> > Raw Audit Messages
> >
> > host=janus.x.y.z type=AVC msg=audit(1254236125.438:70641): avc: denied
> > { unlink } for pid=27420 comm="smbd" name="log.cs244-24.old" dev=sda5
> > ino=164076 scontext=root:system_r:smbd_t:s0
> > tcontext=root:object_r:samba_log_t:s0 tclass=file
> >
> > host=janus.x.y.z type=SYSCALL msg=audit(1254236125.438:70641):
> > arch=c000003e syscall=82 success=no exit=-13 a0=2b1b457b5220
> > a1=7fffa9a7ba90 a2=1f a3=0 items=0 ppid=3787 pid=27420 auid=0 uid=0 gid=0
> > euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=1675
> > comm="smbd" exe="/usr/sbin/smbd" subj=root:system_r:smbd_t:s0 key=(null)
> >
> >
> > log.cs244-24.old is a file not a directory and it's located in
> > the /var/log/samba directory with permissions
> > system_u:object_r:samba_log_t samba
> >
> > Any ideas,
>
> Looks like a valid bug in selinux-policy to me:
>
> echo "avc: denied {
> unlink } for pid=27420 comm="smbd" name="log.cs244-24.old" dev=sda5
> ino=164076 scontext=root:system_r:smbd_t:s0
> tcontext=root:object_r:samba_log_t:s0 tclass=file" | audit2allow -M mysmbd;
> /usr/sbin/semodule -i mysmbd.pp
>
> Should grant this particular access vector.
>