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Bug 1740146 - selinux prevents auditd to use KRB5 peer authentication for remote logging
Summary: selinux prevents auditd to use KRB5 peer authentication for remote logging
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: selinux-policy
Version: 8.1
Hardware: All
OS: Linux
high
medium
Target Milestone: rc
: 8.1
Assignee: Lukas Vrabec
QA Contact: Milos Malik
URL:
Whiteboard:
Depends On:
Blocks: 1752577
TreeView+ depends on / blocked
 
Reported: 2019-08-12 11:22 UTC by Ondrej Moriš
Modified: 2020-11-14 06:04 UTC (History)
6 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
: 1752577 (view as bug list)
Environment:
Last Closed: 2019-11-05 22:12:10 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2019:3547 0 None None None 2019-11-05 22:12:19 UTC

Description Ondrej Moriš 2019-08-12 11:22:05 UTC 
Description of problem:

Current selinux policy prevents auditd to use KRB5 peer authentication for remote logging:

# ausearch -ts recent -m AVC -r
type=AVC msg=audit(1565607649.040:874): avc:  denied  { write } for  pid=22946 comm="auditd" name="tmp" dev="vda1" ino=4215739 scontext=system_u:system_r:auditd_t:s0 tcontext=system_u:object_r:tmp_t:s0 tclass=dir permissive=1
type=AVC msg=audit(1565607649.040:874): avc:  denied  { add_name } for  pid=22946 comm="auditd" name="auditd_0" scontext=system_u:system_r:auditd_t:s0 tcontext=system_u:object_r:tmp_t:s0 tclass=dir permissive=1
type=AVC msg=audit(1565607649.040:874): avc:  denied  { create } for  pid=22946 comm="auditd" name="auditd_0" scontext=system_u:system_r:auditd_t:s0 tcontext=system_u:object_r:tmp_t:s0 tclass=file permissive=1
type=SYSCALL msg=audit(1565607649.040:874): arch=c000003e syscall=257 success=yes exit=14 a0=ffffff9c a1=56243313ed00 a2=2c1 a3=180 items=0 ppid=22945 pid=22946 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="auditd" exe="/usr/sbin/auditd" subj=system_u:system_r:auditd_t:s0 key=(null)ARCH=x86_64 SYSCALL=openat AUID="unset" UID="root" GID="root" EUID="root" SUID="root" FSUID="root" EGID="root" SGID="root" FSGID="root"
type=PROCTITLE msg=audit(1565607649.040:874): proctitle="/sbin/auditd"

# ausearch -ts recent -m AVC -r | audit2allow

#============= auditd_t ==============
allow auditd_t tmp_t:dir { add_name write };
allow auditd_t tmp_t:file create;

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

selinux-policy-3.14.3-13.el8

How reproducible:

100%

Steps to Reproduce:

1. Execute TC#553604 - /CoreOS/audit/Sanity/audisp-au-remote-plugin 
2. See "Using Kerberos" phase.

Actual results:

auditd cannot be started on remote logging server using KRB5 peer authentication

Expected results:

auditd can be started

Additional info:
Comment 2 Lukas Vrabec 2019-08-12 12:19:26 UTC 
commit 4bb7d1c3ab0445804e1c822e971e052466acc772 (HEAD -> rhel8.1-base)
Author: Lukas Vrabec <lvrabec>
Date:   Mon Aug 12 14:17:12 2019 +0200

    Allow auditd_t domain to create auditd_tmp_t temporary files and dirs in /tmp or /var/tmp
    Resolves: rhbz#1740146
Comment 25 errata-xmlrpc 2019-11-05 22:12:10 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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