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Bug 2122061

Summary:	SELinux is preventing /usr/bin/ps from sys_ptrace access on the cap_userns labeled insights_client_t.
Product:	Red Hat Enterprise Linux 9	Reporter:	Andras Kovacs <andras0602>
Component:	selinux-policy	Assignee:	Zdenek Pytela <zpytela>
Status:	CLOSED ERRATA	QA Contact:	Milos Malik <mmalik>
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	ahitacat, cmarinea, fjansen, lvrabec, mmalik, nknazeko, stomsa
Target Milestone:	rc	Keywords:	Triaged
Target Release:	9.2	Flags:	pm-rhel: mirror+
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:	selinux-policy-34.1.43-1.el9	Doc Type:	No Doc Update
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2023-05-09 08:16:32 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

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