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Bug 2122061 - SELinux is preventing /usr/bin/ps from sys_ptrace access on the cap_userns labeled insights_client_t.
Summary: SELinux is preventing /usr/bin/ps from sys_ptrace access on the cap_userns la...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 9
Classification: Red Hat
Component: selinux-policy
Version: unspecified
Hardware: x86_64
OS: Linux
high
high
Target Milestone: rc
: 9.2
Assignee: Zdenek Pytela
QA Contact: Milos Malik
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2022-08-28 23:39 UTC by Andras Kovacs
Modified: 2023-05-09 10:20 UTC (History)
7 users (show)

Fixed In Version: selinux-policy-34.1.43-1.el9
Doc Type: No Doc Update
Doc Text:
Clone Of:
Environment:
Last Closed: 2023-05-09 08:16:32 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker RHELPLAN-132514 0 None None None 2022-08-28 23:52:57 UTC
Red Hat Product Errata RHBA-2023:2483 0 None None None 2023-05-09 08:16:51 UTC

Description Andras Kovacs 2022-08-28 23:39:08 UTC 
Description of problem:
I got this SELinux policy violation when the insights-client.timer kicked in.


SELinux is preventing /usr/bin/ps from 'sys_ptrace' accesses on the cap_userns labeled insights_client_t.

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

If you believe that ps should be allowed sys_ptrace access on cap_userns labeled insights_client_t 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 'ps' --raw | audit2allow -M my-ps
# semodule -X 300 -i my-ps.pp

Additional Information:
Source Context                system_u:system_r:insights_client_t:s0
Target Context                system_u:system_r:insights_client_t:s0
Target Objects                Unknown [ cap_userns ]
Source                        ps
Source Path                   /usr/bin/ps
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           net-tools-2.0-0.62.20160912git.el9.x86_64
Target RPM Packages           
SELinux Policy RPM            selinux-policy-targeted-34.1.29-1.el9_0.2.noarch
Local Policy RPM              selinux-policy-targeted-34.1.29-1.el9_0.2.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 5.14.0-70.22.1.el9_0.x86_64 #1 SMP
                              PREEMPT Tue Aug 2 10:02:12 EDT 2022 x86_64 x86_64
Alert Count                   65416
First Seen                    2022-08-25 12:36:20 CEST
Last Seen                     2022-08-29 00:18:12 CEST
Local ID                      873ce1ad-a8ae-434b-ab6f-0ede89fe11d7

Raw Audit Messages
type=AVC msg=audit(1661725092.154:23937): avc:  denied  { sys_ptrace } for  pid=59249 comm="netstat" capability=19  scontext=system_u:system_r:insights_client_t:s0 tcontext=system_u:system_r:insights_client_t:s0 tclass=cap_userns permissive=0


type=SYSCALL msg=audit(1661725092.154:23937): arch=x86_64 syscall=readlink success=no exit=EACCES a0=7ffcf3ea9650 a1=7ffcf3ea9430 a2=1d a3=6 items=0 ppid=59248 pid=59249 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm=netstat exe=/usr/bin/netstat subj=system_u:system_r:insights_client_t:s0 key=(null)

Hash: ps,insights_client_t,insights_client_t,cap_userns,sys_ptrace


Version-Release number of selected component (if applicable):
insights-client-3.1.7-6.el9_0.noarch


Additional info:
It happened 65416 times in a few minutes.
# ls -Z /usr/bin/netstat /usr/bin/ps 
system_u:object_r:bin_t:s0 /usr/bin/netstat
system_u:object_r:bin_t:s0 /usr/bin/ps
Comment 1 Zdenek Pytela 2022-10-06 09:25:56 UTC 
I believe  the reporte issues has been addressed on current systems:

rhel91# rpm -q selinux-policy
selinux-policy-34.1.43-1.el9.noarch
Comment 8 errata-xmlrpc 2023-05-09 08:16:32 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (selinux-policy bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2023:2483
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