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Bug 1685689 - SELinux denials appear when confined users run journalctl
Summary: SELinux denials appear when confined users run journalctl
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: selinux-policy
Version: 8.0
Hardware: All
OS: Linux
medium
medium
Target Milestone: rc
: 8.1
Assignee: Lukas Vrabec
QA Contact: Milos Malik
URL:
Whiteboard:
Depends On: 1673107 1682526
Blocks: 1778780
TreeView+ depends on / blocked
 
Reported: 2019-03-05 19:39 UTC by Milos Malik
Modified: 2021-10-07 11:44 UTC (History)
5 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2019-11-05 22:10:18 UTC
Type: Bug
Target Upstream Version:
Embargoed:

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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2019:3547 0 None None None 2019-11-05 22:11:39 UTC

Description Milos Malik 2019-03-05 19:39:17 UTC 
Description of problem:
 * if the domain_can_mmap_files boolean was enabled, then the SELinux denials would not have appeared, but the boolean is disabled by default

Version-Release number of selected component (if applicable):
selinux-policy-3.14.1-61.el8.noarch
selinux-policy-devel-3.14.1-61.el8.noarch
selinux-policy-targeted-3.14.1-61.el8.noarch
systemd-239-13.el8.x86_64
systemd-libs-239-13.el8.x86_64
systemd-pam-239-13.el8.x86_64
systemd-udev-239-13.el8.x86_64

How reproducible:
 * always

Steps to Reproduce:
1. get a RHEL-8.0 machine (targeted policy is active)
2. create a confined user (e.g. staff_u, sysadm_u, user_u)
3. log in as the user (via ssh or via console)
4. run journalctl --user
5. run journalctl --system
6. search for SELinux denials

Actual results:
----
type=PROCTITLE msg=audit(03/05/2019 14:12:17.503:1619) : proctitle=journalctl -n 10 --system 
type=MMAP msg=audit(03/05/2019 14:12:17.503:1619) : fd=5 flags=MAP_SHARED 
type=SYSCALL msg=audit(03/05/2019 14:12:17.503:1619) : arch=x86_64 syscall=mmap success=no exit=EACCES(Permission denied) a0=0x0 a1=0x800000 a2=PROT_READ a3=MAP_SHARED items=0 ppid=26662 pid=26663 auid=user1748 uid=user1748 gid=user1748 euid=user1748 suid=user1748 fsuid=user1748 egid=user1748 sgid=user1748 fsgid=user1748 tty=pts2 ses=47 comm=journalctl exe=/usr/bin/journalctl subj=staff_u:staff_r:journalctl_t:s0-s0:c0.c1023 key=(null) 
type=AVC msg=audit(03/05/2019 14:12:17.503:1619) : avc:  denied  { map } for  pid=26663 comm=journalctl path=/run/log/journal/bfd37efc55db4f44a0f350821db2b810/system.journal dev="tmpfs" ino=11263 scontext=staff_u:staff_r:journalctl_t:s0-s0:c0.c1023 tcontext=system_u:object_r:syslogd_var_run_t:s0 tclass=file permissive=0 
----
type=PROCTITLE msg=audit(03/05/2019 14:12:30.509:1724) : proctitle=journalctl -n 10 --system 
type=MMAP msg=audit(03/05/2019 14:12:30.509:1724) : fd=5 flags=MAP_SHARED 
type=SYSCALL msg=audit(03/05/2019 14:12:30.509:1724) : arch=x86_64 syscall=mmap success=no exit=EACCES(Permission denied) a0=0x0 a1=0x800000 a2=PROT_READ a3=MAP_SHARED items=0 ppid=26892 pid=26893 auid=user1748 uid=user1748 gid=user1748 euid=user1748 suid=user1748 fsuid=user1748 egid=user1748 sgid=user1748 fsgid=user1748 tty=pts2 ses=51 comm=journalctl exe=/usr/bin/journalctl subj=user_u:user_r:journalctl_t:s0 key=(null) 
type=AVC msg=audit(03/05/2019 14:12:30.509:1724) : avc:  denied  { map } for  pid=26893 comm=journalctl path=/run/log/journal/bfd37efc55db4f44a0f350821db2b810/system.journal dev="tmpfs" ino=11263 scontext=user_u:user_r:journalctl_t:s0 tcontext=system_u:object_r:syslogd_var_run_t:s0 tclass=file permissive=0 
----
type=PROCTITLE msg=audit(03/05/2019 14:12:43.212:1829) : proctitle=journalctl -n 10 --system 
type=MMAP msg=audit(03/05/2019 14:12:43.212:1829) : fd=5 flags=MAP_SHARED 
type=SYSCALL msg=audit(03/05/2019 14:12:43.212:1829) : arch=x86_64 syscall=mmap success=no exit=EACCES(Permission denied) a0=0x0 a1=0x800000 a2=PROT_READ a3=MAP_SHARED items=0 ppid=27121 pid=27122 auid=user1748 uid=user1748 gid=user1748 euid=user1748 suid=user1748 fsuid=user1748 egid=user1748 sgid=user1748 fsgid=user1748 tty=pts2 ses=55 comm=journalctl exe=/usr/bin/journalctl subj=sysadm_u:sysadm_r:journalctl_t:s0-s0:c0.c1023 key=(null) 
type=AVC msg=audit(03/05/2019 14:12:43.212:1829) : avc:  denied  { map } for  pid=27122 comm=journalctl path=/run/log/journal/bfd37efc55db4f44a0f350821db2b810/system.journal dev="tmpfs" ino=11263 scontext=sysadm_u:sysadm_r:journalctl_t:s0-s0:c0.c1023 tcontext=system_u:object_r:syslogd_var_run_t:s0 tclass=file permissive=0 
----

Expected results:
 * no SELinux denials
Comment 1 Lukas Vrabec 2019-03-06 12:22:13 UTC 
Fixed in Fedora.

commit 9a31dd235f6f3713e65b7c03bdfde6a328f8039b (HEAD -> rawhide)
Author: Lukas Vrabec <lvrabec>
Date:   Wed Mar 6 13:21:47 2019 +0100

    Allow journalctl_t domain to mmap syslogd_var_run_t files
Comment 13 errata-xmlrpc 2019-11-05 22:10:18 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, 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-2019:3547
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