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Bug 2143878 - Frequent AVC denial messages in commands executed via insights-client
Summary: Frequent AVC denial messages in commands executed via insights-client
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: selinux-policy
Version: 8.7
Hardware: All
OS: Linux
high
medium
Target Milestone: rc
: 8.8
Assignee: Zdenek Pytela
QA Contact: Milos Malik
Mirek Jahoda
URL:
Whiteboard:
: 2161716 (view as bug list)
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2022-11-18 07:55 UTC by kyoneyama
Modified: 2023-05-16 11:03 UTC (History)
13 users (show)

Fixed In Version: selinux-policy-3.14.3-115.el8
Doc Type: No Doc Update
Doc Text:
Clone Of:
Environment:
Last Closed: 2023-05-16 09:04:17 UTC
Type: Bug
Target Upstream Version:
Embargoed:
pm-rhel: mirror+

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Github fedora-selinux selinux-policy pull 1480 0 None open Allow insights client communicate with cupsd and redis 2022-11-25 11:35:09 UTC
Github fedora-selinux selinux-policy pull 1558 0 None open Allow insights-client tcp connect to all ports 2023-01-17 11:04:38 UTC
Red Hat Issue Tracker RHELPLAN-139891 0 None None None 2022-11-18 09:12:46 UTC
Red Hat Product Errata RHBA-2023:2965 0 None None None 2023-05-16 09:04:37 UTC

Internal Links: 2134125 2152150

Description kyoneyama 2022-11-18 07:55:43 UTC 
Description of problem:

Frequent AVC denial messages in commands executed via insights-client
Each time a service is initiated by a timer, AVC denial occurs.

The following five types of errors are reproducible in my environment.

(1)
----
time->Wed Nov  9 02:57:05 2022
:
node=localhost.localdomain type=AVC msg=audit(1667930225.799:8258): avc:  denied  { read } for  pid=173101 comm="luksmeta" name="random" dev="devtmpfs" ino=18 scontext=system_u:system_r:insights_client_t:s0 tcontext=system_u:object_r:random_device_t:s0 tclass=chr_file permissive=0
----

(2)
----
time->Wed Nov  9 02:57:13 2022
:
node=localhost.localdomain type=AVC msg=audit(1667930233.308:8261): avc:  denied  { create } for  pid=173262 comm="semanage" scontext=system_u:system_r:insights_client_t:s0 tcontext=system_u:system_r:insights_client_t:s0 tclass=netlink_audit_socket permissive=0
----

(3)
----
time->Wed Nov  9 02:57:13 2022
:
node=localhost.localdomain type=AVC msg=audit(1667930233.313:8262): avc:  denied  { write } for  pid=173262 comm="semanage" name="modules" dev="dm-0" ino=202016482 scontext=system_u:system_r:insights_client_t:s0 tcontext=unconfined_u:object_r:semanage_store_t:s0 tclass=dir permissive=0
----

(4)
----
time->Wed Nov  9 02:57:17 2022
:
node=localhost.localdomain type=AVC msg=audit(1667930237.924:8266): avc:  denied  { read } for  pid=173441 comm="lpstat" name="cups.sock" dev="tmpfs" ino=38149 scontext=system_u:system_r:insights_client_t:s0 tcontext=system_u:object_r:cupsd_var_run_t:s0 tclass=sock_file permissive=0
----

(5)
----
time->Wed Nov  9 02:57:20 2022
:
node=localhost.localdomain type=AVC msg=audit(1667930240.094:8278): avc:  denied  { write } for  pid=173477 comm="vdo" name="_etc_vdoconf.yml.lock" dev="tmpfs" ino=30989 scontext=system_u:system_r:insights_client_t:s0 tcontext=system_u:object_r:var_lock_t:s0 tclass=file permissive=0
----


AVC denial also occur in the customer's environment for the following NVME device.

(a)
----insights-client-3.1.7-8.el8.noarch
selinux-policy-3.14.3-108.el8.noarch                        Tue Nov  8 20:48:40 2022
time->Wed Nov  9 02:57:05 2022
:
node=localhost.localdomain type=AVC msg=audit(1667930225.596:8252): avc:  denied  { read } for  pid=173094 comm="luksmeta" name="nvme1n1p2" dev="devtmpfs" ino=16701 scontext=system_u:system_r:insights_client_t:s0 tcontext=system_u:object_r:nvme_device_t:s0 tclass=blk_file permissive=0
----

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

- Red Hat Enterprise Linux 8.7
- insights-client-3.1.7-8.el8
- selinux-policy-3.14.3-108.el8

How reproducible:

Always

Steps to Reproduce:

1. Install relevent packages:
  # yum install insights-client 
  # yum install luksmeta policycoreutils-python-utils cups vdo

2. Register a host:
  # insights-client --register

3. Start insights-client service immediately:
  # systemctl start insights-client.service

4. See messages and audit.log
  # grep setroubleshoot /var/log/messages
  # ausearch -ts recent -m AVC
Comment 1 Milos Malik 2022-11-21 17:40:22 UTC 
# rpm -qa selinux\*
selinux-policy-3.14.3-110.el8.noarch
selinux-policy-targeted-3.14.3-110.el8.noarch
#

----
type=PROCTITLE msg=audit(11/21/2022 12:32:53.618:393) : proctitle=/usr/libexec/platform-python -Es /sbin/semanage login -l 
type=PATH msg=audit(11/21/2022 12:32:53.618:393) : item=0 name=/var/lib/selinux/targeted/active/modules inode=7746929 dev=fd:01 mode=dir,700 ouid=root ogid=root rdev=00:00 obj=system_u:object_r:semanage_store_t:s0 nametype=NORMAL cap_fp=none cap_fi=none cap_fe=0 cap_fver=0 cap_frootid=0 
type=CWD msg=audit(11/21/2022 12:32:53.618:393) : cwd=/ 
type=SYSCALL msg=audit(11/21/2022 12:32:53.618:393) : arch=x86_64 syscall=access success=no exit=EACCES(Permission denied) a0=0x559c0821cfa0 a1=X_OK|W_OK|R_OK a2=0x0 a3=0x100 items=1 ppid=18619 pid=18620 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=semanage exe=/usr/libexec/platform-python3.6 subj=system_u:system_r:insights_client_t:s0 key=(null) 
type=AVC msg=audit(11/21/2022 12:32:53.618:393) : avc:  denied  { write } for  pid=18620 comm=semanage name=modules dev="vda1" ino=7746929 scontext=system_u:system_r:insights_client_t:s0 tcontext=system_u:object_r:semanage_store_t:s0 tclass=dir permissive=0 
----
type=PROCTITLE msg=audit(11/21/2022 12:32:54.913:394) : proctitle=/usr/libexec/platform-python /usr/bin/vdo status 
type=PATH msg=audit(11/21/2022 12:32:54.913:394) : item=0 name=/run/lock/vdo/_etc_vdoconf.yml.lock inode=53912 dev=00:18 mode=file,644 ouid=root ogid=root rdev=00:00 obj=unconfined_u:object_r:var_lock_t:s0 nametype=NORMAL cap_fp=none cap_fi=none cap_fe=0 cap_fver=0 cap_frootid=0 
type=CWD msg=audit(11/21/2022 12:32:54.913:394) : cwd=/ 
type=SYSCALL msg=audit(11/21/2022 12:32:54.913:394) : arch=x86_64 syscall=openat success=no exit=EACCES(Permission denied) a0=AT_FDCWD a1=0x7ff6b61c33b0 a2=O_RDWR|O_CLOEXEC a3=0x0 items=1 ppid=18633 pid=18634 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=vdo exe=/usr/libexec/platform-python3.6 subj=system_u:system_r:insights_client_t:s0 key=(null) 
type=AVC msg=audit(11/21/2022 12:32:54.913:394) : avc:  denied  { write } for  pid=18634 comm=vdo name=_etc_vdoconf.yml.lock dev="tmpfs" ino=53912 scontext=system_u:system_r:insights_client_t:s0 tcontext=unconfined_u:object_r:var_lock_t:s0 tclass=file permissive=0 
----
type=PROCTITLE msg=audit(11/21/2022 12:32:57.216:395) : proctitle=/usr/bin/lpstat -p 
type=SOCKADDR msg=audit(11/21/2022 12:32:57.216:395) : saddr={ saddr_fam=inet6 laddr=::1 lport=631 } 
type=SYSCALL msg=audit(11/21/2022 12:32:57.216:395) : arch=x86_64 syscall=connect success=no exit=EACCES(Permission denied) a0=0x3 a1=0x5599801b7578 a2=0x1c a3=0x7ffc157ee7bc items=0 ppid=18854 pid=18855 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=lpstat exe=/usr/bin/lpstat.cups subj=system_u:system_r:insights_client_t:s0 key=(null) 
type=AVC msg=audit(11/21/2022 12:32:57.216:395) : avc:  denied  { name_connect } for  pid=18855 comm=lpstat dest=631 scontext=system_u:system_r:insights_client_t:s0 tcontext=system_u:object_r:ipp_port_t:s0 tclass=tcp_socket permissive=0 
----

After starting the cups service, which was not running during my first attempt, the following SELinux denial appeared as well:
----
type=PROCTITLE msg=audit(11/21/2022 12:37:11.792:423) : proctitle=/usr/bin/lpstat -p 
type=PATH msg=audit(11/21/2022 12:37:11.792:423) : item=0 name=/var/run/cups/cups.sock inode=120650 dev=00:18 mode=socket,777 ouid=root ogid=root rdev=00:00 obj=system_u:object_r:cupsd_var_run_t:s0 nametype=NORMAL cap_fp=none cap_fi=none cap_fe=0 cap_fver=0 cap_frootid=0 
type=CWD msg=audit(11/21/2022 12:37:11.792:423) : cwd=/ 
type=SYSCALL msg=audit(11/21/2022 12:37:11.792:423) : arch=x86_64 syscall=access success=no exit=EACCES(Permission denied) a0=0x7f39b2e273c5 a1=R_OK a2=0x4 a3=0xffffffff items=1 ppid=19995 pid=19996 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=lpstat exe=/usr/bin/lpstat.cups subj=system_u:system_r:insights_client_t:s0 key=(null) 
type=AVC msg=audit(11/21/2022 12:37:11.792:423) : avc:  denied  { read } for  pid=19996 comm=lpstat name=cups.sock dev="tmpfs" ino=120650 scontext=system_u:system_r:insights_client_t:s0 tcontext=system_u:object_r:cupsd_var_run_t:s0 tclass=sock_file permissive=0 
----

Reproduced on 1minutetip machine with the 1MT-RHEL-8.8.0-20221114.3 image.
Comment 3 Zdenek Pytela 2022-11-24 15:53:37 UTC 
There seems to remain only a few of the reported problems in the current policy:

rhel88# rpm -q selinux-policy
selinux-policy-3.14.3-111.el8.noarch
rhel88# sesearch -A -s insights_client_t -t var_lock_t -c file -p write
allow insights_client_t var_lock_t:file { append create getattr ioctl link lock open read rename setattr unlink write };
rhel88# sesearch -T -s insights_client_t -t semanage_exec_t
type_transition insights_client_t semanage_exec_t:process semanage_t;

So:
rhel88# sesearch -T -s insights_client_t -t lpr_exec_t
rhel88# sesearch -A -s insights_client_t -t redis_var_run_t -c sock_file -p write
rhel88# sesearch -A -s insights_client_t -t nvme_device_t -c blk_file -p read
<>

0dd73bfa00 (Nikola Knazekova 2022-06-08 10:41:05 +0200 176) storage_raw_read_fixed_disk(insights_client_t)
and
https://github.com/fedora-selinux/selinux-policy/pull/1480
Comment 24 Zdenek Pytela 2023-01-17 18:43:13 UTC 
*** Bug 2161716 has been marked as a duplicate of this bug. ***
Comment 33 errata-xmlrpc 2023-05-16 09:04:17 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-2023:2965
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