Bug 543621 - SELinux is preventing /bin/rm "write" access on /etc.
Summary: SELinux is preventing /bin/rm "write" access on /etc.
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: selinux-policy
Version: 12
Hardware: x86_64
OS: Linux
low
medium
Target Milestone: ---
Assignee: Daniel Walsh
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: setroubleshoot_trace_hash:37ad3f2601c...
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2009-12-02 18:23 UTC by Loran
Modified: 2009-12-12 00:23 UTC (History)
4 users (show)

Fixed In Version: 3.6.32-55.fc12
Clone Of:
Environment:
Last Closed: 2009-12-07 22:47:47 UTC
Type: ---
Embargoed:


Attachments (Terms of Use)

Description Loran 2009-12-02 18:23:43 UTC
Summary:

SELinux is preventing /bin/rm "write" access on /etc.

Detailed Description:

[rm has a permissive type (prelink_cron_system_t). This access was not denied.]

SELinux denied access requested by rm. It is not expected that this access is
required by rm and this access may signal an intrusion attempt. It is also
possible that the specific version or configuration of the application is
causing it to require additional access.

Allowing Access:

You can generate a local policy module to allow this access - see FAQ
(http://fedora.redhat.com/docs/selinux-faq-fc5/#id2961385) Please file a bug
report.

Additional Information:

Source Context                system_u:system_r:prelink_cron_system_t:s0-s0:c0.c
                              1023
Target Context                system_u:object_r:etc_t:s0
Target Objects                /etc [ dir ]
Source                        rm
Source Path                   /bin/rm
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           coreutils-7.6-7.fc12
Target RPM Packages           filesystem-2.4.30-2.fc12
Policy RPM                    selinux-policy-3.6.32-49.fc12
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Plugin Name                   catchall
Host Name                     (removed)
Platform                      Linux (removed) 2.6.31.6-145.fc12.x86_64
                              #1 SMP Sat Nov 21 15:57:45 EST 2009 x86_64 x86_64
Alert Count                   3
First Seen                    Wed 02 Dec 2009 10:19:48 AM CST
Last Seen                     Wed 02 Dec 2009 10:19:48 AM CST
Local ID                      5968f9df-6f3d-4bfa-87a5-0bcffaf62614
Line Numbers                  

Raw Audit Messages            

node=(removed) type=AVC msg=audit(1259770788.302:22734): avc:  denied  { write } for  pid=26188 comm="rm" name="etc" dev=dm-1 ino=38 scontext=system_u:system_r:prelink_cron_system_t:s0-s0:c0.c1023 tcontext=system_u:object_r:etc_t:s0 tclass=dir

node=(removed) type=AVC msg=audit(1259770788.302:22734): avc:  denied  { remove_name } for  pid=26188 comm="rm" name="prelink.cache" dev=dm-1 ino=88596 scontext=system_u:system_r:prelink_cron_system_t:s0-s0:c0.c1023 tcontext=system_u:object_r:etc_t:s0 tclass=dir

node=(removed) type=AVC msg=audit(1259770788.302:22734): avc:  denied  { unlink } for  pid=26188 comm="rm" name="prelink.cache" dev=dm-1 ino=88596 scontext=system_u:system_r:prelink_cron_system_t:s0-s0:c0.c1023 tcontext=system_u:object_r:prelink_cache_t:s0 tclass=file

node=(removed) type=SYSCALL msg=audit(1259770788.302:22734): arch=c000003e syscall=263 success=yes exit=0 a0=ffffffffffffff9c a1=7fff4cc56f2a a2=0 a3=7fff4cc55e30 items=0 ppid=26184 pid=26188 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=2 comm="rm" exe="/bin/rm" subj=system_u:system_r:prelink_cron_system_t:s0-s0:c0.c1023 key=(null)



Hash String generated from  selinux-policy-3.6.32-49.fc12,catchall,rm,prelink_cron_system_t,etc_t,dir,write
audit2allow suggests:

#============= prelink_cron_system_t ==============
allow prelink_cron_system_t etc_t:dir { write remove_name };
allow prelink_cron_system_t prelink_cache_t:file unlink;

Comment 1 Daniel Walsh 2009-12-02 18:54:14 UTC

You can add these rules for now using

# grep avc /var/log/audit/audit.log | audit2allow -M mypol
# semodule -i mypol.pp

Fixed in selinux-policy-3.6.32-53.fc12.noarch

Comment 2 Fedora Update System 2009-12-03 20:28:14 UTC
selinux-policy-3.6.32-55.fc12 has been submitted as an update for Fedora 12.
http://admin.fedoraproject.org/updates/selinux-policy-3.6.32-55.fc12

Comment 3 Fedora Update System 2009-12-04 23:46:29 UTC
selinux-policy-3.6.32-55.fc12 has been pushed to the Fedora 12 testing repository.  If problems still persist, please make note of it in this bug report.
 If you want to test the update, you can install it with 
 su -c 'yum --enablerepo=updates-testing update selinux-policy'.  You can provide feedback for this update here: http://admin.fedoraproject.org/updates/F12/FEDORA-2009-12650

Comment 4 Fedora Update System 2009-12-08 07:53:10 UTC
selinux-policy-3.6.32-55.fc12 has been pushed to the Fedora 12 stable repository.  If problems still persist, please make note of it in this bug report.


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