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Bug 1479383 - stunnel >=5.41 needs additional rules.
Summary: stunnel >=5.41 needs additional rules.
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: selinux-policy
Version: 7.3
Hardware: All
OS: Linux
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Lukas Vrabec
QA Contact: Milos Malik
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2017-08-08 13:13 UTC by Frank Büttner
Modified: 2018-04-10 12:37 UTC (History)
6 users (show)

Fixed In Version: selinux-policy-3.13.1-174.el7
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2018-04-10 12:36:40 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2018:0763 0 None None None 2018-04-10 12:37:47 UTC

Description Frank Büttner 2017-08-08 13:13:51 UTC 
Description of problem:
Newer versions need additional selinux rules to work. 

Version-Release number of selected component (if applicable):
selinux-policy-targeted-3.13.1-102.el7_3.16.noarch


audit:
type=AVC msg=audit(1502196618.804:2350): avc:  denied  { sys_nice } for  pid=50312 comm="stunnel" capability=23  scontext=system_u:system_r:stunnel_t:s0 tcontext=system_u:system_r:stunnel_t:s0 tclass=capability
type=AVC msg=audit(1502196618.804:2350): avc:  denied  { setsched } for  pid=50312 comm="stunnel" scontext=system_u:system_r:stunnel_t:s0 tcontext=system_u:system_r:stunnel_t:s0 tclass=process



Additional rule:
require {
        type stunnel_t;
        class capability { dac_override dac_read_search sys_nice };
        class process setsched;
}

#============= stunnel_t ==============
allow stunnel_t self:capability { dac_override dac_read_search sys_nice };
allow stunnel_t self:process setsched;
Comment 2 Milos Malik 2017-08-18 15:15:14 UTC 
# rpm -qa selinux-policy\* stunnel\* | sort
selinux-policy-3.13.1-166.el7.noarch
selinux-policy-devel-3.13.1-166.el7.noarch
selinux-policy-targeted-3.13.1-166.el7.noarch
stunnel-5.41-3.el7.x86_64 (rebuilt from fc27.src.rpm)
#

Following SELinux denials appeared in enforcing mode:
----
type=PROCTITLE msg=audit(08/18/2017 11:12:21.183:282) : proctitle=/usr/bin/stunnel 
type=SYSCALL msg=audit(08/18/2017 11:12:21.183:282) : arch=x86_64 syscall=sched_setscheduler success=no exit=EACCES(Permission denied) a0=0x7245 a1=SCHED_BATCH a2=0x7f33d0aaadc0 a3=0x7f33d0aaaaa0 items=0 ppid=25205 pid=29252 auid=root uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=4 comm=stunnel exe=/usr/bin/stunnel subj=system_u:system_r:stunnel_t:s0 key=(null) 
type=AVC msg=audit(08/18/2017 11:12:21.183:282) : avc:  denied  { setsched } for  pid=29252 comm=stunnel scontext=system_u:system_r:stunnel_t:s0 tcontext=system_u:system_r:stunnel_t:s0 tclass=process 
type=AVC msg=audit(08/18/2017 11:12:21.183:282) : avc:  denied  { sys_nice } for  pid=29252 comm=stunnel capability=sys_nice  scontext=system_u:system_r:stunnel_t:s0 tcontext=system_u:system_r:stunnel_t:s0 tclass=capability 
----
Comment 3 Milos Malik 2017-08-18 15:19:50 UTC 
Following SELinux denials appeared in permissive mode:
----
type=PROCTITLE msg=audit(08/18/2017 11:17:19.554:293) : proctitle=/usr/bin/stunnel 
type=SYSCALL msg=audit(08/18/2017 11:17:19.554:293) : arch=x86_64 syscall=sched_setscheduler success=yes exit=0 a0=0x1053 a1=SCHED_BATCH a2=0x7f96d86a1dc0 a3=0x7f96d86a1aa0 items=0 ppid=663 pid=4178 auid=root uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=pts0 ses=4 comm=stunnel exe=/usr/bin/stunnel subj=system_u:system_r:stunnel_t:s0 key=(null) 
type=AVC msg=audit(08/18/2017 11:17:19.554:293) : avc:  denied  { setsched } for  pid=4178 comm=stunnel scontext=system_u:system_r:stunnel_t:s0 tcontext=system_u:system_r:stunnel_t:s0 tclass=process 
type=AVC msg=audit(08/18/2017 11:17:19.554:293) : avc:  denied  { sys_nice } for  pid=4178 comm=stunnel capability=sys_nice  scontext=system_u:system_r:stunnel_t:s0 tcontext=system_u:system_r:stunnel_t:s0 tclass=capability 
----
Comment 8 errata-xmlrpc 2018-04-10 12:36:40 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-2018:0763
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