Bug 483893 - restorecond doesn't protect SELinux context of my /etc/hosts
restorecond doesn't protect SELinux context of my /etc/hosts
Product: Fedora
Classification: Fedora
Component: policycoreutils (Show other bugs)
All Linux
low Severity medium
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Assigned To: Daniel Walsh
Fedora Extras Quality Assurance
: SELinux
Depends On:
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Reported: 2009-02-04 02:12 EST by Matěj Cepl
Modified: 2018-04-11 10:51 EDT (History)
3 users (show)

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Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2009-02-04 11:07:12 EST
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RHEL 7.3 requirements from Atomic Host:
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Description Matěj Cepl 2009-02-04 02:12:08 EST
Description of problem:
Shouldn't /etc/hosts be in /etc/selinux/restorecond.conf? I don't have it here and when I have scripts in /etc/NetworkManager/dispatcher.d (of my own) which are mangling /etc/hosts according to my needs, I get SELinux context of /etc/hosts hosed:

[matej@viklef ~]$ sudo restorecon -v -R /etc/hosts
/sbin/restorecon reset /etc/hosts context system_u:object_r:etc_runtime_t:s0->system_u:object_r:net_conf_t:s0

I have to fix the SELinux context after I got this AVC denial message:


SELinux is preventing sudo (staff_sudo_t) "read" to ./hosts (etc_runtime_t).

Podrobný popis:

[SELinux je v uvolněném režimu, operace by byla odmítnuta, ale byla povolena
kvůli uvolněnému režimu.]

SELinux denied access requested by sudo. It is not expected that this access is
required by sudo 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.

Povolení přístupu:

Sometimes labeling problems can cause SELinux denials. You could try to restore
the default system file context for ./hosts,

restorecon -v './hosts'

If this does not work, there is currently no automatic way to allow this access.
Instead, you can generate a local policy module to allow this access - see FAQ
(http://fedora.redhat.com/docs/selinux-faq-fc5/#id2961385) Or you can disable
SELinux protection altogether. Disabling SELinux protection is not recommended.
Please file a bug report (http://bugzilla.redhat.com/bugzilla/enter_bug.cgi)
against this package.

Další informace:

Kontext zdroje                staff_u:staff_r:staff_sudo_t:s0-s0:c0.c1023
Kontext cíle                 system_u:object_r:etc_runtime_t:s0
Objekty cíle                 ./hosts [ file ]
Zdroj                         sudo
Cesta zdroje                  /usr/bin/sudo
Port                          <Neznámé>
Počítač                    viklef.ceplovi.cz
RPM balíčky zdroje          sudo-1.6.9p17-5.fc10
RPM balíčky cíle           
RPM politiky                  selinux-policy-3.5.13-41.fc10
Selinux povolen               True
Typ politiky                  targeted
MLS povoleno                  True
Vynucovací režim            Permissive
Název zásuvného modulu     catchall_file
Název počítače            viklef.ceplovi.cz
Platforma                     Linux viklef.ceplovi.cz
                     #1 SMP Wed Jan 21
                              01:33:24 EST 2009 x86_64 x86_64
Počet upozornění           4
Poprvé viděno               St 4. únor 2009, 08:01:50 CET
Naposledy viděno             St 4. únor 2009, 08:02:27 CET
Místní ID                   a656d322-c54d-4cc9-85df-a4e9909aaefa
Čísla řádků              

Původní zprávy auditu      

node=viklef.ceplovi.cz type=AVC msg=audit(1233730947.501:99): avc:  denied  { read } for  pid=11175 comm="sudo" name="hosts" dev=dm-0 ino=197823 scontext=staff_u:staff_r:staff_sudo_t:s0-s0:c0.c1023 tcontext=system_u:object_r:etc_runtime_t:s0 tclass=file

node=viklef.ceplovi.cz type=SYSCALL msg=audit(1233730947.501:99): arch=c000003e syscall=2 success=yes exit=5 a0=7fdac60f2c10 a1=80000 a2=1b6 a3=7fdacafdc7a0 items=0 ppid=11129 pid=11175 auid=500 uid=0 gid=500 euid=0 suid=0 fsuid=0 egid=500 sgid=500 fsgid=500 tty=pts2 ses=2 comm="sudo" exe="/usr/bin/sudo" subj=staff_u:staff_r:staff_sudo_t:s0-s0:c0.c1023 key=(null)

Version-Release number of selected component (if applicable):

How reproducible:
100% with my scripts after every change in network
Comment 1 Daniel Walsh 2009-02-04 11:07:12 EST
Add a restorecon /etc/hosts to your scripts.

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