Bug 1698743

Summary: Mongodb-org policy violation
Product: [Fedora] Fedora Reporter: Kostya Vasilyev <kmansoft>
Component: selinux-policy-targetedAssignee: Lukas Vrabec <lvrabec>
Status: CLOSED ERRATA QA Contact: Ben Levenson <benl>
Severity: medium Docs Contact:
Priority: medium    
Version: 30CC: dwalsh
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Last Closed: 2019-04-27 21:27:03 UTC Type: Bug
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Description Kostya Vasilyev 2019-04-11 07:23:02 UTC
Description of problem:

Mongodb-org causes an SELinux violation.

Now that Mongo has been removed from F30 repositories, I'm using Mongo's reps:

baseurl=https://repo.mongodb.org/yum/redhat/7/mongodb-org/4.0/x86_64/

After updating to latest (mongodb-org-server-4.0.9-1.el7.x86_64) I'm getting the below SELinux violation.

Now I understand that it's debatable whether Fedora should provide / fix an SE policy for what's now a third party package, but ...

... since Mongo was just recently dropped from official repos, I suppose there will be many developers switching to mongodb-org packages instead.

Supporting them with an up-to-date SE policy would be a nice way to ease the transition.

And them maybe - maybe - at some point Mongo starts producing Fedora packages, hopefully with SELinux policy files included.

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

mongodb-org-server-4.0.9-1.el7.x86_64
selinux-policy-targeted-3.14.3-27.fc30.noarch


How reproducible:


Steps to Reproduce:
1.
2.
3.

Actual results:

------------
SELinux is preventing mongod from search access on the directory /sys/fs/cgroup.

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

If you believe that mongod should be allowed search access on the cgroup directory by default.
Then you should report this as a bug.
You can generate a local policy module to allow this access.
Do
allow this access for now by executing:
# ausearch -c 'mongod' --raw | audit2allow -M my-mongod
# semodule -X 300 -i my-mongod.pp

Additional Information:
Source Context                system_u:system_r:mongod_t:s0
Target Context                system_u:object_r:cgroup_t:s0
Target Objects                /sys/fs/cgroup [ dir ]
Source                        mongod
Source Path                   mongod
Port                          <Unknown>
Host                          frida
Source RPM Packages           
Target RPM Packages           
Policy RPM                    selinux-policy-3.14.3-27.fc30.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     frida
Platform                      Linux frida 5.0.7-300.fc30.x86_64 #1 SMP Mon Apr 8
                              18:28:09 UTC 2019 x86_64 x86_64
Alert Count                   4
First Seen                    2019-04-11 09:59:08 MSK
Last Seen                     2019-04-11 10:17:33 MSK
Local ID                      d2da1aa9-7e03-4281-a7b2-320d97761c9b

Raw Audit Messages
type=AVC msg=audit(1554967053.307:398): avc:  denied  { search } for  pid=6195 comm="mongod" name="/" dev="tmpfs" ino=15454 scontext=system_u:system_r:mongod_t:s0 tcontext=system_u:object_r:cgroup_t:s0 tclass=dir permissive=0


Hash: mongod,mongod_t,cgroup_t,dir,search
---------

Comment 1 Lukas Vrabec 2019-04-11 08:13:23 UTC
commit b78d1b1ed3768cb6241486b76edd9b473fe60e6f (HEAD -> rawhide)
Author: Lukas Vrabec <lvrabec>
Date:   Thu Apr 11 10:12:28 2019 +0200

    Allow mongod_t domain to lsearch in cgroups BZ(1698743)

Comment 2 Fedora Update System 2019-04-19 21:58:35 UTC
selinux-policy-3.14.3-31.fc30 has been submitted as an update to Fedora 30. https://bodhi.fedoraproject.org/updates/FEDORA-2019-3055c546d6

Comment 3 Kostya Vasilyev 2019-04-20 11:19:21 UTC
Installed Packages

selinux-policy.noarch                                   3.14.3-31.fc30                           @@commandline
selinux-policy-targeted.noarch                          3.14.3-31.fc30                           @@commandline


Rebooted the system

Did not help mongo

----

SELinux is preventing mongod from read access on the file memory.limit_in_bytes.

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

If you believe that mongod should be allowed read access on the memory.limit_in_bytes file by default.
Then you should report this as a bug.
You can generate a local policy module to allow this access.
Do
allow this access for now by executing:
# ausearch -c 'mongod' --raw | audit2allow -M my-mongod
# semodule -X 300 -i my-mongod.pp

Additional Information:
Source Context                system_u:system_r:mongod_t:s0
Target Context                system_u:object_r:cgroup_t:s0
Target Objects                memory.limit_in_bytes [ file ]
Source                        mongod
Source Path                   mongod
Port                          <Unknown>
Host                          frida
Source RPM Packages           
Target RPM Packages           
Policy RPM                    selinux-policy-3.14.3-31.fc30.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     frida
Platform                      Linux frida 5.0.8-300.fc30.x86_64 #1 SMP Wed Apr
                              17 16:55:36 UTC 2019 x86_64 x86_64
Alert Count                   38
First Seen                    2019-04-15 21:22:28 MSK
Last Seen                     2019-04-20 14:16:55 MSK
Local ID                      45ae7f2c-4d2a-4253-928d-c02cb631101c

Raw Audit Messages
type=AVC msg=audit(1555759015.407:223): avc:  denied  { read } for  pid=2024 comm="mongod" name="memory.limit_in_bytes" dev="cgroup" ino=10 scontext=system_u:system_r:mongod_t:s0 tcontext=system_u:object_r:cgroup_t:s0 tclass=file permissive=0


Hash: mongod,mongod_t,cgroup_t,file,read

Comment 4 Kostya Vasilyev 2019-04-20 11:23:01 UTC
Installed Packages

mongodb-org-server.x86_64                                 4.0.9-1.el7                                 @Mongodb
mongodb-org-shell.x86_64                                  4.0.9-1.el7                                 @Mongodb

On second sight, maybe the new violation is really new (i.e. not reported yet). Sorry about that.

Perhaps previously it was "hidden" by the "tmpfs" violation?

Comment 5 Fedora Update System 2019-04-20 14:42:15 UTC
selinux-policy-3.14.3-31.fc30 has been pushed to the Fedora 30 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2019-3055c546d6

Comment 6 Fedora Update System 2019-04-27 21:27:03 UTC
selinux-policy-3.14.3-31.fc30 has been pushed to the Fedora 30 stable repository. If problems still persist, please make note of it in this bug report.