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Bug 2054657 - SELinux prevents the chage process from executing the sss_cache program
Summary: SELinux prevents the chage process from executing the sss_cache program
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 9
Classification: Red Hat
Component: selinux-policy
Version: 9.0
Hardware: All
OS: Linux
medium
medium
Target Milestone: rc
: 9.0
Assignee: Zdenek Pytela
QA Contact: Milos Malik
URL:
Whiteboard:
: 2057261 2057297 (view as bug list)
Depends On:
Blocks: 2057261
TreeView+ depends on / blocked
 
Reported: 2022-02-15 12:47 UTC by Filip Dvorak
Modified: 2022-05-18 09:25 UTC (History)
5 users (show)

Fixed In Version: selinux-policy-34.1.27-1.el9
Doc Type: No Doc Update
Doc Text:
Clone Of:
: 2054718 (view as bug list)
Environment:
Last Closed: 2022-05-17 15:50:20 UTC
Type: Bug
Target Upstream Version:
Embargoed:
pm-rhel: mirror+

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker RHELPLAN-112328 0 None None None 2022-02-15 12:55:14 UTC
Red Hat Product Errata RHBA-2022:3918 0 None None None 2022-05-17 15:50:36 UTC

Description Filip Dvorak 2022-02-15 12:47:00 UTC 
Description of problem:
there is a AVC message when the command chage is used.

Version-Release number of selected component (if applicable):
selinux-policy-34.1.24-1.el9.noarch
RHEL9

Steps to Reproduce:
1.create a user with some passwoed and use "chage -m 1 -M 90 alice"

Actual results:

SELinux status:                 enabled
SELinuxfs mount:                /sys/fs/selinux
SELinux root directory:         /etc/selinux
Loaded policy name:             targeted
Current mode:                   enforcing
Mode from config file:          enforcing
Policy MLS status:              enabled
Policy deny_unknown status:     allowed
Memory protection checking:     actual (secure)
Max kernel policy version:      33
selinux-policy-34.1.24-1.el9.noarch
----
time->Mon Feb 14 11:05:32 2022
type=PROCTITLE msg=audit(1644854732.203:3013): proctitle=6368616765002D2D6C6173746461790031002D2D6D617864617973003100627A373533373634
type=SYSCALL msg=audit(1644854732.203:3013): arch=c000003e syscall=59 success=no exit=-13 a0=55a24bba9d8a a1=7ffc08331630 a2=7ffc08331628 a3=7fd01cab2008 items=0 ppid=102517 pid=102520 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4 comm="chage" exe="/usr/bin/chage" subj=unconfined_u:unconfined_r:passwd_t:s0-s0:c0.c1023 key=(null)
type=AVC msg=audit(1644854732.203:3013): avc:  denied  { execute } for  pid=102520 comm="chage" name="sss_cache" dev="vda4" ino=4596 scontext=unconfined_u:unconfined_r:passwd_t:s0-s0:c0.c1023 tcontext=system_u:object_r:sssd_exec_t:s0 tclass=file permissive=0


Expected results:
No AVC message.
Comment 2 Milos Malik 2022-02-15 14:21:17 UTC 
Caught in enforcing mode:

# chage -m 1 -M 90 alice
chage: cannot execute /usr/sbin/sss_cache: Permission denied
#

----
type=PROCTITLE msg=audit(02/15/2022 09:18:24.688:429) : proctitle=chage -m 1 -M 90 alice 
type=PATH msg=audit(02/15/2022 09:18:24.688:429) : item=0 name=/usr/sbin/sss_cache inode=6802998 dev=fd:01 mode=file,755 ouid=root ogid=root rdev=00:00 obj=system_u:object_r:sssd_exec_t:s0 nametype=NORMAL cap_fp=none cap_fi=none cap_fe=0 cap_fver=0 cap_frootid=0 
type=CWD msg=audit(02/15/2022 09:18:24.688:429) : cwd=/root 
type=SYSCALL msg=audit(02/15/2022 09:18:24.688:429) : arch=x86_64 syscall=execve success=no exit=EACCES(Permission denied) a0=0x56158fb26d8a a1=0x7fff96782950 a2=0x7fff96782948 a3=0x7f1d57889008 items=1 ppid=5674 pid=5677 auid=root uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=pts0 ses=4 comm=chage exe=/usr/bin/chage subj=unconfined_u:unconfined_r:passwd_t:s0-s0:c0.c1023 key=(null) 
type=AVC msg=audit(02/15/2022 09:18:24.688:429) : avc:  denied  { execute } for  pid=5677 comm=chage name=sss_cache dev="vda1" ino=6802998 scontext=unconfined_u:unconfined_r:passwd_t:s0-s0:c0.c1023 tcontext=system_u:object_r:sssd_exec_t:s0 tclass=file permissive=0 
----

Caught in permissive mode:

# chage -m 1 -M 90 alice
#

----
type=PROCTITLE msg=audit(02/15/2022 09:19:34.552:435) : proctitle=sss_cache -UG 
type=PATH msg=audit(02/15/2022 09:19:34.552:435) : item=1 name=/lib64/ld-linux-x86-64.so.2 inode=6413786 dev=fd:01 mode=file,755 ouid=root ogid=root rdev=00:00 obj=system_u:object_r:ld_so_t:s0 nametype=NORMAL cap_fp=none cap_fi=none cap_fe=0 cap_fver=0 cap_frootid=0 
type=PATH msg=audit(02/15/2022 09:19:34.552:435) : item=0 name=/usr/sbin/sss_cache inode=6802998 dev=fd:01 mode=file,755 ouid=root ogid=root rdev=00:00 obj=system_u:object_r:sssd_exec_t:s0 nametype=NORMAL cap_fp=none cap_fi=none cap_fe=0 cap_fver=0 cap_frootid=0 
type=CWD msg=audit(02/15/2022 09:19:34.552:435) : cwd=/root 
type=EXECVE msg=audit(02/15/2022 09:19:34.552:435) : argc=2 a0=sss_cache a1=-UG 
type=SYSCALL msg=audit(02/15/2022 09:19:34.552:435) : arch=x86_64 syscall=execve success=yes exit=0 a0=0x555f0b935d8a a1=0x7ffc8a1d36d0 a2=0x7ffc8a1d36c8 a3=0x7f29cfb02008 items=2 ppid=5681 pid=5684 auid=root uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=pts0 ses=4 comm=sss_cache exe=/usr/sbin/sss_cache subj=unconfined_u:unconfined_r:passwd_t:s0-s0:c0.c1023 key=(null) 
type=AVC msg=audit(02/15/2022 09:19:34.552:435) : avc:  denied  { map } for  pid=5684 comm=sss_cache path=/usr/sbin/sss_cache dev="vda1" ino=6802998 scontext=unconfined_u:unconfined_r:passwd_t:s0-s0:c0.c1023 tcontext=system_u:object_r:sssd_exec_t:s0 tclass=file permissive=1 
type=AVC msg=audit(02/15/2022 09:19:34.552:435) : avc:  denied  { execute_no_trans } for  pid=5684 comm=chage path=/usr/sbin/sss_cache dev="vda1" ino=6802998 scontext=unconfined_u:unconfined_r:passwd_t:s0-s0:c0.c1023 tcontext=system_u:object_r:sssd_exec_t:s0 tclass=file permissive=1 
type=AVC msg=audit(02/15/2022 09:19:34.552:435) : avc:  denied  { read open } for  pid=5684 comm=chage path=/usr/sbin/sss_cache dev="vda1" ino=6802998 scontext=unconfined_u:unconfined_r:passwd_t:s0-s0:c0.c1023 tcontext=system_u:object_r:sssd_exec_t:s0 tclass=file permissive=1 
type=AVC msg=audit(02/15/2022 09:19:34.552:435) : avc:  denied  { execute } for  pid=5684 comm=chage name=sss_cache dev="vda1" ino=6802998 scontext=unconfined_u:unconfined_r:passwd_t:s0-s0:c0.c1023 tcontext=system_u:object_r:sssd_exec_t:s0 tclass=file permissive=1 
----
Comment 4 Zdenek Pytela 2022-02-16 19:57:28 UTC 
To backport:
commit f540263f5ffcf315b970ca6428b2f04ff5c13f59
Author: Zdenek Pytela <zpytela>
Date:   Wed Feb 16 16:57:08 2022 +0100

    Allow chage domtrans to sssd
Comment 12 Cédric Jeanneret 2022-02-23 07:44:17 UTC 
*** Bug 2057297 has been marked as a duplicate of this bug. ***
Comment 14 errata-xmlrpc 2022-05-17 15:50:20 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 (new packages: selinux-policy), 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-2022:3918
Comment 15 Sandeep Yadav 2022-05-18 09:25:39 UTC 
*** Bug 2057261 has been marked as a duplicate of this bug. ***
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