Bug 987778 - selinux prevents dyntransition with sshd
selinux prevents dyntransition with sshd
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: selinux-policy (Show other bugs)
Unspecified Unspecified
unspecified Severity medium
: rc
: ---
Assigned To: Miroslav Grepl
BaseOS QE Security Team
Depends On:
  Show dependency treegraph
Reported: 2013-07-24 03:11 EDT by David Spurek
Modified: 2015-03-02 00:27 EST (History)
3 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2013-07-24 04:18:54 EDT
Type: Bug
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)

  None (edit)
Description David Spurek 2013-07-24 03:11:22 EDT
Description of problem:
selinux prevents dyntransition with sshd.

ausearch output:

time->Wed Jul 24 02:24:21 2013
type=SYSCALL msg=audit(1374647061.593:2024): arch=c000003e syscall=1 success=no exit=-13 a0=8 a1=7fa07e96e590 a2=36 a3=666e6f636e753a72 items=0 ppid=25992 pid=26005 auid=0 uid=9999 gid=9999 euid=9999 suid=9999 fsuid=9999 egid=9999 sgid=9999 fsgid=9999 ses=70 tty=pts0 comm="sshd" exe="/usr/sbin/sshd" subj=unconfined_u:system_r:unconfined_t:s0-s0:c0.c1023 key=(null)
type=AVC msg=audit(1374647061.593:2024): avc:  denied  { dyntransition } for  pid=26005 comm="sshd" scontext=unconfined_u:system_r:unconfined_t:s0-s0:c0.c1023 tcontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tclass=process

part of log from sshd server:

debug1: SELinux support enabled [preauth]
debug3: ssh_selinux_change_context: setting context from 'unconfined_u:system_r:
unconfined_t:s0-s0:c0.c1023' to 'unconfined_u:system_r:sshd_net_t:s0-s0:c0.c1023
' [preauth]
debug3: ssh_selinux_change_context: setcon unconfined_u:system_r:sshd_net_t:s0-s
0:c0.c1023 from unconfined_u:system_r:unconfined_t:s0-s0:c0.c1023 failed with Pe
rmission denied [preauth]

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

How reproducible:

Steps to Reproduce:
1.run reproduce test

Actual results:
AVC message, in log of ssh server i see - ssh_selinux_change_context: failed with Permission denied [preauth] 

Expected results:
no AVC message, no problem with ssh_selinux_change_context in sshd log

Additional info:
Comment 2 Miroslav Grepl 2013-07-24 04:18:54 EDT
basically it means that the sshd daemon is running with the bad context. Did you start it by hand?

Are you trying to debug sshd?

Note You need to log in before you can comment on or make changes to this bug.