Bug 886096

Summary: SELinux is preventing /opt/google/chrome/nacl_helper_bootstrap from 'search' accesses on the directory 1.
Product: [Fedora] Fedora Reporter: Christian Weinz <christian.weinz>
Component: selinux-policyAssignee: Miroslav Grepl <mgrepl>
Status: CLOSED CURRENTRELEASE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 18CC: dominick.grift, dwalsh, mgrepl
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Unspecified   
Whiteboard: abrt_hash:52943f7d8fa86a9f2601d511a5ca929893e065898aa30683323670dea59978a0
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2012-12-18 06:52:49 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Christian Weinz 2012-12-11 14:01:24 UTC
Description of problem:
I launched Chrome 24.0.1312.35 beta on Fedora 18.
SELinux is preventing /opt/google/chrome/nacl_helper_bootstrap from 'search' accesses on the directory 1.

*****  Plugin catchall (100. confidence) suggests  ***************************

If sie denken, dass es nacl_helper_bootstrap standardmässig erlaubt sein sollte, search Zugriff auf 1 directory zu erhalten.
Then sie sollten dies als Fehler melden.
Um diesen Zugriff zu erlauben, können Sie ein lokales Richtlinien-Modul erstellen.
Do
zugriff jetzt erlauben, indem Sie die nachfolgenden Befehle ausführen:
# grep nacl_helper_boo /var/log/audit/audit.log | audit2allow -M mypol
# semodule -i mypol.pp

Additional Information:
Source Context                unconfined_u:unconfined_r:chrome_sandbox_nacl_t:s0
                              -s0:c0.c1023
Target Context                system_u:system_r:init_t:s0
Target Objects                1 [ dir ]
Source                        nacl_helper_boo
Source Path                   /opt/google/chrome/nacl_helper_bootstrap
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           google-chrome-beta-24.0.1312.35-171386.x86_64
Target RPM Packages           
Policy RPM                    selinux-policy-3.11.1-60.fc18.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 3.6.9-4.fc18.x86_64 #1 SMP Tue Dec
                              4 14:12:51 UTC 2012 x86_64 x86_64
Alert Count                   9
First Seen                    2012-12-11 03:03:44 CET
Last Seen                     2012-12-11 14:50:58 CET
Local ID                      3504d439-db4b-440c-8877-1859ac3e487a

Raw Audit Messages
type=AVC msg=audit(1355233858.915:330): avc:  denied  { search } for  pid=9529 comm="nacl_helper_boo" name="1" dev="proc" ino=9236 scontext=unconfined_u:unconfined_r:chrome_sandbox_nacl_t:s0-s0:c0.c1023 tcontext=system_u:system_r:init_t:s0 tclass=dir


type=SYSCALL msg=audit(1355233858.915:330): arch=x86_64 syscall=open success=no exit=EACCES a0=7fffd0265680 a1=0 a2=1b6 a3=1969ef0 items=0 ppid=1 pid=9529 auid=1000 uid=1000 gid=1000 euid=1000 suid=1000 fsuid=1000 egid=1000 sgid=1000 fsgid=1000 tty=(none) ses=1 comm=nacl_helper_boo exe=/opt/google/chrome/nacl_helper_bootstrap subj=unconfined_u:unconfined_r:chrome_sandbox_nacl_t:s0-s0:c0.c1023 key=(null)

Hash: nacl_helper_boo,chrome_sandbox_nacl_t,init_t,dir,search

audit2allow
audit2allow -R

Additional info:
hashmarkername: setroubleshoot
kernel:         3.6.9-4.fc18.x86_64
type:           libreport

Comment 1 Daniel Walsh 2012-12-11 19:05:23 UTC
Did anything actually break or just an AVC show up?

Comment 2 Christian Weinz 2012-12-11 19:19:42 UTC
(In reply to comment #1)
> Did anything actually break or just an AVC show up?

There was nothing i noticed malfunctioning.

Comment 3 Daniel Walsh 2012-12-11 19:23:04 UTC
Fixed in selinux-policy-3.11.1-63.fc18.noarch

Comment 4 Christian Weinz 2012-12-11 19:39:59 UTC
How did you fix this issue?

Comment 5 Daniel Walsh 2012-12-11 20:46:38 UTC
I am allowing it to read pid 1 data.

Comment 6 Christian Weinz 2012-12-11 20:56:04 UTC
Thank you. I'm interested in learning.
Can you:
- tell me how you decided that this access is undangerous
or 
- point me to some point where to read about how to decide such accesses?

Comment 7 Daniel Walsh 2012-12-11 21:07:48 UTC
Just going on experience and thinking about what kind of information might be leaked from reading /proc/1/* by a non priv user.

Usually if it is standard system data and the process is read, I am lenient.   Writing and reading random content owned by non standard apps is more interesting, and reading content in /home is something I think twice about.

Comment 8 Fedora Update System 2012-12-17 17:38:25 UTC
selinux-policy-3.11.1-66.fc18 has been submitted as an update for Fedora 18.
https://admin.fedoraproject.org/updates/selinux-policy-3.11.1-66.fc18

Comment 9 Fedora Update System 2012-12-18 06:52:51 UTC
selinux-policy-3.11.1-66.fc18 has been pushed to the Fedora 18 stable repository.  If problems still persist, please make note of it in this bug report.