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Bug 2097942 - [RHEL8]: SELinux prevents samba-dcerpcd and rpcd_classic
Summary: [RHEL8]: SELinux prevents samba-dcerpcd and rpcd_classic
Keywords:
Status: CLOSED DUPLICATE of bug 2083504
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: selinux-policy
Version: 8.7
Hardware: Unspecified
OS: Linux
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Zdenek Pytela
QA Contact: Milos Malik
URL:
Whiteboard:
Depends On: 2097789
Blocks:
TreeView+ depends on / blocked
 
Reported: 2022-06-17 02:15 UTC by xiaoli feng
Modified: 2022-06-17 16:10 UTC (History)
5 users (show)

Fixed In Version:
Doc Type: No Doc Update
Doc Text:
Clone Of: 2097789
Environment:
Last Closed: 2022-06-17 07:19:13 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-125544 0 None None None 2022-06-17 02:24:08 UTC

Description xiaoli feng 2022-06-17 02:15:08 UTC 
This issue also exist on RHEL8.7 even if selinux mode is Permissive. And this issue is included from selinux-policy-3.14.3-100.el8. Doesn't have this issue with selinux-policy-3.14.3-99.el8.

[root@hp-dl380pg8-10 ~]#  smbclient -L //$HOSTNAME/testuser  -N
Anonymous login successful

	Sharename       Type      Comment
	---------       ----      -------
	cifs            Disk      
	IPC$            IPC       IPC Service (Samba 4.16.1)
SMB1 disabled -- no workgroup available
[root@hp-dl380pg8-10 ~]# ausearch -m avc
----
time->Thu Jun 16 21:51:36 2022
type=PROCTITLE msg=audit(1655430696.375:366): proctitle=2F7573722F6C6962657865632F73616D62612F73616D62612D64636572706364002D2D6C6962657865632D7270636473002D2D72656164792D7369676E616C2D66643D3333002D2D6E702D68656C706572002D2D64656275676C6576656C3D30
type=SYSCALL msg=audit(1655430696.375:366): arch=c000003e syscall=21 success=yes exit=0 a0=7ffcf1b1bd50 a1=4 a2=8 a3=55e2c2cbe44c items=0 ppid=92462 pid=92463 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="samba-dcerpcd" exe="/usr/libexec/samba/samba-dcerpcd" subj=system_u:system_r:winbind_rpcd_t:s0 key=(null)
type=AVC msg=audit(1655430696.375:366): avc:  denied  { read } for  pid=92463 comm="samba-dcerpcd" name="unix" dev="proc" ino=4026532071 scontext=system_u:system_r:winbind_rpcd_t:s0 tcontext=system_u:object_r:proc_net_t:s0 tclass=file permissive=1
----
time->Thu Jun 16 21:51:36 2022
type=PROCTITLE msg=audit(1655430696.379:367): proctitle=2F7573722F6C6962657865632F73616D62612F73616D62612D64636572706364002D2D6C6962657865632D7270636473002D2D72656164792D7369676E616C2D66643D3333002D2D6E702D68656C706572002D2D64656275676C6576656C3D30
type=SYSCALL msg=audit(1655430696.379:367): arch=c000003e syscall=257 success=yes exit=10 a0=ffffff9c a1=7fdeabab755a a2=0 a3=0 items=0 ppid=1 pid=92464 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="samba-dcerpcd" exe="/usr/libexec/samba/samba-dcerpcd" subj=system_u:system_r:winbind_rpcd_t:s0 key=(null)
type=AVC msg=audit(1655430696.379:367): avc:  denied  { open } for  pid=92464 comm="samba-dcerpcd" path="/proc/sys/kernel/core_pattern" dev="proc" ino=16523 scontext=system_u:system_r:winbind_rpcd_t:s0 tcontext=system_u:object_r:usermodehelper_t:s0 tclass=file permissive=1
type=AVC msg=audit(1655430696.379:367): avc:  denied  { read } for  pid=92464 comm="samba-dcerpcd" name="core_pattern" dev="proc" ino=16523 scontext=system_u:system_r:winbind_rpcd_t:s0 tcontext=system_u:object_r:usermodehelper_t:s0 tclass=file permissive=1
----
time->Thu Jun 16 21:51:36 2022
type=PROCTITLE msg=audit(1655430696.379:368): proctitle=2F7573722F6C6962657865632F73616D62612F73616D62612D64636572706364002D2D6C6962657865632D7270636473002D2D72656164792D7369676E616C2D66643D3333002D2D6E702D68656C706572002D2D64656275676C6576656C3D30
type=PATH msg=audit(1655430696.379:368): item=1 name=(null) inode=134380804 dev=fd:00 mode=040700 ouid=0 ogid=0 rdev=00:00 obj=system_u:object_r:samba_log_t:s0 nametype=CREATE cap_fp=0 cap_fi=0 cap_fe=0 cap_fver=0 cap_frootid=0
type=PATH msg=audit(1655430696.379:368): item=0 name=(null) inode=168162510 dev=fd:00 mode=040700 ouid=0 ogid=0 rdev=00:00 obj=system_u:object_r:samba_log_t:s0 nametype=PARENT cap_fp=0 cap_fi=0 cap_fe=0 cap_fver=0 cap_frootid=0
type=CWD msg=audit(1655430696.379:368): cwd="/tmp"
type=SYSCALL msg=audit(1655430696.379:368): arch=c000003e syscall=83 success=yes exit=0 a0=55e2c2cbe950 a1=1c0 a2=0 a3=0 items=2 ppid=1 pid=92464 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="samba-dcerpcd" exe="/usr/libexec/samba/samba-dcerpcd" subj=system_u:system_r:winbind_rpcd_t:s0 key=(null)
type=AVC msg=audit(1655430696.379:368): avc:  denied  { create } for  pid=92464 comm="samba-dcerpcd" name="samba-dcerpcd" scontext=system_u:system_r:winbind_rpcd_t:s0 tcontext=system_u:object_r:samba_log_t:s0 tclass=dir permissive=1
----
time->Thu Jun 16 21:51:36 2022
type=PROCTITLE msg=audit(1655430696.380:369): proctitle=2F7573722F6C6962657865632F73616D62612F73616D62612D64636572706364002D2D6C6962657865632D7270636473002D2D72656164792D7369676E616C2D66643D3333002D2D6E702D68656C706572002D2D64656275676C6576656C3D30
type=SYSCALL msg=audit(1655430696.380:369): arch=c000003e syscall=257 success=yes exit=4 a0=ffffff9c a1=55e2c2c77380 a2=80000 a3=0 items=0 ppid=1 pid=92464 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="samba-dcerpcd" exe="/usr/libexec/samba/samba-dcerpcd" subj=system_u:system_r:winbind_rpcd_t:s0 key=(null)
type=AVC msg=audit(1655430696.380:369): avc:  denied  { open } for  pid=92464 comm="samba-dcerpcd" path="/var/lib/sss/mc/passwd" dev="dm-0" ino=235086415 scontext=system_u:system_r:winbind_rpcd_t:s0 tcontext=system_u:object_r:sssd_public_t:s0 tclass=file permissive=1
type=AVC msg=audit(1655430696.380:369): avc:  denied  { read } for  pid=92464 comm="samba-dcerpcd" name="passwd" dev="dm-0" ino=235086415 scontext=system_u:system_r:winbind_rpcd_t:s0 tcontext=system_u:object_r:sssd_public_t:s0 tclass=file permissive=1
----
time->Thu Jun 16 21:51:36 2022
type=PROCTITLE msg=audit(1655430696.381:370): proctitle=2F7573722F6C6962657865632F73616D62612F73616D62612D64636572706364002D2D6C6962657865632D7270636473002D2D72656164792D7369676E616C2D66643D3333002D2D6E702D68656C706572002D2D64656275676C6576656C3D30
type=SYSCALL msg=audit(1655430696.381:370): arch=c000003e syscall=5 success=yes exit=0 a0=4 a1=7ffcf1b1bab0 a2=7ffcf1b1bab0 a3=0 items=0 ppid=1 pid=92464 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="samba-dcerpcd" exe="/usr/libexec/samba/samba-dcerpcd" subj=system_u:system_r:winbind_rpcd_t:s0 key=(null)
type=AVC msg=audit(1655430696.381:370): avc:  denied  { getattr } for  pid=92464 comm="samba-dcerpcd" path="/var/lib/sss/mc/passwd" dev="dm-0" ino=235086415 scontext=system_u:system_r:winbind_rpcd_t:s0 tcontext=system_u:object_r:sssd_public_t:s0 tclass=file permissive=1
----
time->Thu Jun 16 21:51:36 2022
type=PROCTITLE msg=audit(1655430696.381:371): proctitle=2F7573722F6C6962657865632F73616D62612F73616D62612D64636572706364002D2D6C6962657865632D7270636473002D2D72656164792D7369676E616C2D66643D3333002D2D6E702D68656C706572002D2D64656275676C6576656C3D30
type=SYSCALL msg=audit(1655430696.381:371): arch=c000003e syscall=9 success=yes exit=140594152484864 a0=0 a1=8d32e0 a2=1 a3=1 items=0 ppid=1 pid=92464 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="samba-dcerpcd" exe="/usr/libexec/samba/samba-dcerpcd" subj=system_u:system_r:winbind_rpcd_t:s0 key=(null)
type=AVC msg=audit(1655430696.381:371): avc:  denied  { map } for  pid=92464 comm="samba-dcerpcd" path="/var/lib/sss/mc/passwd" dev="dm-0" ino=235086415 scontext=system_u:system_r:winbind_rpcd_t:s0 tcontext=system_u:object_r:sssd_public_t:s0 tclass=file permissive=1
----
time->Thu Jun 16 21:51:36 2022
type=PROCTITLE msg=audit(1655430696.383:372): proctitle=2F7573722F6C6962657865632F73616D62612F73616D62612D64636572706364002D2D6C6962657865632D7270636473002D2D72656164792D7369676E616C2D66643D3333002D2D6E702D68656C706572002D2D64656275676C6576656C3D30
type=SYSCALL msg=audit(1655430696.383:372): arch=c000003e syscall=42 success=yes exit=0 a0=d a1=55e2c2cc2d40 a2=1d a3=7ffcf1b1b010 items=0 ppid=1 pid=92464 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="samba-dcerpcd" exe="/usr/libexec/samba/samba-dcerpcd" subj=system_u:system_r:winbind_rpcd_t:s0 key=(null)
type=AVC msg=audit(1655430696.383:372): avc:  denied  { connectto } for  pid=92464 comm="samba-dcerpcd" path="/run/dbus/system_bus_socket" scontext=system_u:system_r:winbind_rpcd_t:s0 tcontext=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 tclass=unix_stream_socket permissive=1
type=AVC msg=audit(1655430696.383:372): avc:  denied  { write } for  pid=92464 comm="samba-dcerpcd" name="system_bus_socket" dev="tmpfs" ino=43923 scontext=system_u:system_r:winbind_rpcd_t:s0 tcontext=system_u:object_r:system_dbusd_var_run_t:s0 tclass=sock_file permissive=1
----
time->Thu Jun 16 21:51:36 2022
type=PROCTITLE msg=audit(1655430696.493:376): proctitle=2F7573722F6C6962657865632F73616D62612F727063645F7270636563686F002D2D6C6973742D696E7465726661636573002D2D636F6E66696766696C653D2F6574632F73616D62612F736D622E636F6E66
type=SYSCALL msg=audit(1655430696.493:376): arch=c000003e syscall=21 success=yes exit=0 a0=7ffd90e04880 a1=4 a2=8 a3=5 items=0 ppid=92464 pid=92471 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="rpcd_rpcecho" exe="/usr/libexec/samba/rpcd_rpcecho" subj=system_u:system_r:winbind_rpcd_t:s0 key=(null)
type=AVC msg=audit(1655430696.493:376): avc:  denied  { read } for  pid=92471 comm="rpcd_rpcecho" name="unix" dev="proc" ino=4026532071 scontext=system_u:system_r:winbind_rpcd_t:s0 tcontext=system_u:object_r:proc_net_t:s0 tclass=file permissive=1
----
time->Thu Jun 16 21:51:36 2022
type=PROCTITLE msg=audit(1655430696.671:377): proctitle=2F7573722F6C6962657865632F73616D62612F727063645F636C6173736963002D2D636F6E66696766696C653D2F6574632F73616D62612F736D622E636F6E66002D2D776F726B65722D67726F75703D37002D2D776F726B65722D696E6465783D30002D2D64656275676C6576656C3D30
type=SYSCALL msg=audit(1655430696.671:377): arch=c000003e syscall=42 success=yes exit=0 a0=13 a1=55e36de10a50 a2=6e a3=7ffdb9f64ea0 items=0 ppid=92464 pid=92474 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="rpcd_classic" exe="/usr/libexec/samba/rpcd_classic" subj=system_u:system_r:winbind_rpcd_t:s0 key=(null)
type=AVC msg=audit(1655430696.671:377): avc:  denied  { connectto } for  pid=92474 comm="rpcd_classic" path="/run/samba/ncalrpc/np/winreg" scontext=system_u:system_r:winbind_rpcd_t:s0 tcontext=system_u:system_r:winbind_rpcd_t:s0 tclass=unix_stream_socket permissive=1
----
time->Thu Jun 16 21:51:36 2022
type=PROCTITLE msg=audit(1655430696.672:378): proctitle=2F7573722F6C6962657865632F73616D62612F727063645F636C6173736963002D2D636F6E66696766696C653D2F6574632F73616D62612F736D622E636F6E66002D2D776F726B65722D67726F75703D37002D2D776F726B65722D696E6465783D30002D2D64656275676C6576656C3D30
type=SYSCALL msg=audit(1655430696.672:378): arch=c000003e syscall=42 success=yes exit=0 a0=12 a1=7ffdb9f64de0 a2=6e a3=0 items=0 ppid=92464 pid=92474 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="rpcd_classic" exe="/usr/libexec/samba/rpcd_classic" subj=system_u:system_r:winbind_rpcd_t:s0 key=(null)
type=AVC msg=audit(1655430696.672:378): avc:  denied  { connectto } for  pid=92474 comm="rpcd_classic" path="/var/lib/sss/pipes/nss" scontext=system_u:system_r:winbind_rpcd_t:s0 tcontext=system_u:system_r:sssd_t:s0 tclass=unix_stream_socket permissive=1
type=AVC msg=audit(1655430696.672:378): avc:  denied  { write } for  pid=92474 comm="rpcd_classic" name="nss" dev="dm-0" ino=251739675 scontext=system_u:system_r:winbind_rpcd_t:s0 tcontext=system_u:object_r:sssd_var_lib_t:s0 tclass=sock_file permissive=1
----
time->Thu Jun 16 21:51:36 2022
type=PROCTITLE msg=audit(1655430696.673:379): proctitle=2F7573722F6C6962657865632F73616D62612F727063645F636C6173736963002D2D636F6E66696766696C653D2F6574632F73616D62612F736D622E636F6E66002D2D776F726B65722D67726F75703D37002D2D776F726B65722D696E6465783D30002D2D64656275676C6576656C3D30
type=SYSCALL msg=audit(1655430696.673:379): arch=c000003e syscall=4 success=yes exit=0 a0=55e36de113e8 a1=7ffdb9f62c40 a2=7ffdb9f62c40 a3=0 items=0 ppid=92464 pid=92474 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="rpcd_classic" exe="/usr/libexec/samba/rpcd_classic" subj=system_u:system_r:winbind_rpcd_t:s0 key=(null)
type=AVC msg=audit(1655430696.673:379): avc:  denied  { getattr } for  pid=92474 comm="rpcd_classic" path="/etc/krb5.conf" dev="dm-0" ino=100693580 scontext=system_u:system_r:winbind_rpcd_t:s0 tcontext=system_u:object_r:krb5_conf_t:s0 tclass=file permissive=1


+++ This bug was initially created as a clone of Bug #2097789 +++

Description of problem:
When execute "smbclient -L //$SERVER/testuser -N", Selinux always print avc denied.

[root@sweetpig-11 cthon04]# smbclient -L //sweetpig-11.4a2m.lab.eng.bos.redhat.com/testuser  -N
Anonymous login successful

	Sharename       Type      Comment
	---------       ----      -------
	testuser        Disk      
	IPC$            IPC       IPC Service (Samba 4.16.1)
SMB1 disabled -- no workgroup available
[root@sweetpig-11 cthon04]# ausearch -m avc
----
time->Thu Jun 16 05:01:54 2022
type=PROCTITLE msg=audit(1655370114.462:794): proctitle=2F7573722F6C6962657865632F73616D62612F727063645F636C6173736963002D2D636F6E66696766696C653D2F6574632F73616D62612F736D622E636F6E66002D2D776F726B65722D67726F75703D32002D2D776F726B65722D696E6465783D30002D2D64656275676C6576656C3D30
type=SYSCALL msg=audit(1655370114.462:794): arch=c000003e syscall=42 success=yes exit=0 a0=11 a1=558e96696540 a2=6e a3=7fd0699b0bb4 items=0 ppid=78476 pid=78486 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="rpcd_classic" exe="/usr/libexec/samba/rpcd_classic" subj=system_u:system_r:winbind_rpcd_t:s0 key=(null)
type=AVC msg=audit(1655370114.462:794): avc:  denied  { connectto } for  pid=78486 comm="rpcd_classic" path="/run/samba/ncalrpc/np/winreg" scontext=system_u:system_r:winbind_rpcd_t:s0 tcontext=system_u:system_r:winbind_rpcd_t:s0 tclass=unix_stream_socket permissive=1

[root@sweetpig-11 ~]# cat /etc/samba/smb.conf
[testuser]
	path = /mnt/cifs
	writeable=yes

[root@sweetpig-11 ~]# getenforce 
Permissive

This issue is included from selinux-policy-34.1.34-1.el9.noarch. Doesn't have this issue in selinux-policy-34.1.33-1.el9.noarch.

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

selinux-policy-34.1.34-1.el9.noarch
samba-4.16.1-100.el9.x86_64
5.14.0-109.el9.x86_64

How reproducible:
100%

Steps to Reproduce:
1. systemctl start smb
2. smbclient -L //sweetpig-11.4a2m.lab.eng.bos.redhat.com/testuser  -N
3.

Actual results:
Selinux print avc denied when execute "smbclient -L".

Expected results:
Selinux doesn't print avc denied when execute "smbclient -L".

Additional info:

--- Additional comment from Milos Malik on 2022-06-16 15:22:58 UTC ---
Comment 1 Milos Malik 2022-06-17 07:19:13 UTC 

*** This bug has been marked as a duplicate of bug 2083504 ***
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