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Bug 1349791 - nsd runs openssl which triggers a SELinux denial
Summary: nsd runs openssl which triggers a SELinux denial
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
medium
medium
Target Milestone: rc
: ---
Assignee: Lukas Vrabec
QA Contact: Milos Malik
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2016-06-24 09:36 UTC by Milos Malik
Modified: 2016-11-04 02:32 UTC (History)
6 users (show)

Fixed In Version: selinux-policy-3.13.1-84.el7
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2016-11-04 02:32:37 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2016:2283 0 normal SHIPPED_LIVE selinux-policy bug fix and enhancement update 2016-11-03 13:36:25 UTC

Description Milos Malik 2016-06-24 09:36:31 UTC 
Description of problem:

Version-Release number of selected component (if applicable):
nsd-4.1.8-1.el7.x86_64
selinux-policy-3.13.1-81.el7.noarch
selinux-policy-mls-3.13.1-81.el7.noarch
selinux-policy-targeted-3.13.1-81.el7.noarch
openssl-libs-1.0.1e-58.el7.x86_64
openssl-1.0.1e-58.el7.x86_64

How reproducible:
 * always

Steps to Reproduce:
1. get a RHEL-7.3 machine with active targeted policy
2. service nsd start
3. service nsd status
4. search for SELinux denials

Actual results (enforcing mode):
----
time->Fri Jun 24 09:31:48 2016
type=SYSCALL msg=audit(1466753508.910:776): arch=c000003e syscall=2 success=no exit=-13 a0=7fff858f7f5a a1=241 a2=1b6 a3=24 items=0 ppid=31467 pid=31468 auid=4294967295 uid=0 gid=984 euid=0 suid=0 fsuid=0 egid=984 sgid=984 fsgid=984 tty=(none) ses=4294967295 comm="openssl" exe="/usr/bin/openssl" subj=system_u:system_r:nsd_t:s0 key=(null)
type=AVC msg=audit(1466753508.910:776): avc:  denied  { write } for  pid=31468 comm="openssl" name="nsd" dev="dm-0" ino=101382461 scontext=system_u:system_r:nsd_t:s0 tcontext=system_u:object_r:nsd_conf_t:s0 tclass=dir
----
# ls -ild /etc/nsd/
101382461 drwxr-xr-x. 4 root root 52 Jun 24 08:26 /etc/nsd/
#

Expected results:
* no SELinux denials
Comment 1 Milos Malik 2016-06-24 09:41:24 UTC 
Caught in enforcing mode:
----
time->Fri Jun 24 09:38:14 2016
type=PATH msg=audit(1466753894.914:799): item=1 name="nsd_server.key" objtype=CREATE
type=PATH msg=audit(1466753894.914:799): item=0 name="/etc/nsd" inode=101382461 dev=fd:00 mode=040755 ouid=0 ogid=0 rdev=00:00 obj=system_u:object_r:nsd_conf_t:s0 objtype=PARENT
type=CWD msg=audit(1466753894.914:799):  cwd="/etc/nsd"
type=SYSCALL msg=audit(1466753894.914:799): arch=c000003e syscall=2 success=no exit=-13 a0=7ffc74b06f5a a1=241 a2=1b6 a3=24 items=2 ppid=17010 pid=17011 auid=4294967295 uid=0 gid=984 euid=0 suid=0 fsuid=0 egid=984 sgid=984 fsgid=984 tty=(none) ses=4294967295 comm="openssl" exe="/usr/bin/openssl" subj=system_u:system_r:nsd_t:s0 key=(null)
type=AVC msg=audit(1466753894.914:799): avc:  denied  { write } for  pid=17011 comm="openssl" name="nsd" dev="dm-0" ino=101382461 scontext=system_u:system_r:nsd_t:s0 tcontext=system_u:object_r:nsd_conf_t:s0 tclass=dir
----

Caught in permissive mode:
----
time->Fri Jun 24 09:40:23 2016
type=PATH msg=audit(1466754023.019:814): item=1 name="nsd_server.key" inode=101234802 dev=fd:00 mode=0100640 ouid=0 ogid=984 rdev=00:00 obj=system_u:object_r:nsd_conf_t:s0 objtype=CREATE
type=PATH msg=audit(1466754023.019:814): item=0 name="/etc/nsd" inode=101382461 dev=fd:00 mode=040755 ouid=0 ogid=0 rdev=00:00 obj=system_u:object_r:nsd_conf_t:s0 objtype=PARENT
type=CWD msg=audit(1466754023.019:814):  cwd="/etc/nsd"
type=SYSCALL msg=audit(1466754023.019:814): arch=c000003e syscall=2 success=yes exit=3 a0=7fff78493f5a a1=241 a2=1b6 a3=24 items=2 ppid=2440 pid=2441 auid=4294967295 uid=0 gid=984 euid=0 suid=0 fsuid=0 egid=984 sgid=984 fsgid=984 tty=(none) ses=4294967295 comm="openssl" exe="/usr/bin/openssl" subj=system_u:system_r:nsd_t:s0 key=(null)
type=AVC msg=audit(1466754023.019:814): avc:  denied  { write } for  pid=2441 comm="openssl" path="/etc/nsd/nsd_server.key" dev="dm-0" ino=101234802 scontext=system_u:system_r:nsd_t:s0 tcontext=system_u:object_r:nsd_conf_t:s0 tclass=file
type=AVC msg=audit(1466754023.019:814): avc:  denied  { create } for  pid=2441 comm="openssl" name="nsd_server.key" scontext=system_u:system_r:nsd_t:s0 tcontext=system_u:object_r:nsd_conf_t:s0 tclass=file
type=AVC msg=audit(1466754023.019:814): avc:  denied  { add_name } for  pid=2441 comm="openssl" name="nsd_server.key" scontext=system_u:system_r:nsd_t:s0 tcontext=system_u:object_r:nsd_conf_t:s0 tclass=dir
type=AVC msg=audit(1466754023.019:814): avc:  denied  { write } for  pid=2441 comm="openssl" name="nsd" dev="dm-0" ino=101382461 scontext=system_u:system_r:nsd_t:s0 tcontext=system_u:object_r:nsd_conf_t:s0 tclass=dir
----
time->Fri Jun 24 09:40:24 2016
type=PATH msg=audit(1466754024.320:815): item=0 name="nsd_server.pem" inode=101234805 dev=fd:00 mode=0100640 ouid=0 ogid=984 rdev=00:00 obj=system_u:object_r:nsd_conf_t:s0 objtype=NORMAL
type=CWD msg=audit(1466754024.320:815):  cwd="/etc/nsd"
type=SYSCALL msg=audit(1466754024.320:815): arch=c000003e syscall=268 success=yes exit=0 a0=ffffffffffffff9c a1=159e0f0 a2=1a0 a3=7ffc61d47470 items=1 ppid=2440 pid=2449 auid=4294967295 uid=0 gid=984 euid=0 suid=0 fsuid=0 egid=984 sgid=984 fsgid=984 tty=(none) ses=4294967295 comm="chmod" exe="/usr/bin/chmod" subj=system_u:system_r:nsd_t:s0 key=(null)
type=AVC msg=audit(1466754024.320:815): avc:  denied  { setattr } for  pid=2449 comm="chmod" name="nsd_server.pem" dev="dm-0" ino=101234805 scontext=system_u:system_r:nsd_t:s0 tcontext=system_u:object_r:nsd_conf_t:s0 tclass=file
----
time->Fri Jun 24 09:40:24 2016
type=PATH msg=audit(1466754024.321:816): item=1 name="request.cfg" inode=101234804 dev=fd:00 mode=0100640 ouid=0 ogid=984 rdev=00:00 obj=system_u:object_r:nsd_conf_t:s0 objtype=DELETE
type=PATH msg=audit(1466754024.321:816): item=0 name="/etc/nsd" inode=101382461 dev=fd:00 mode=040755 ouid=0 ogid=0 rdev=00:00 obj=system_u:object_r:nsd_conf_t:s0 objtype=PARENT
type=CWD msg=audit(1466754024.321:816):  cwd="/etc/nsd"
type=SYSCALL msg=audit(1466754024.321:816): arch=c000003e syscall=263 success=yes exit=0 a0=ffffffffffffff9c a1=15240c0 a2=0 a3=7fff7fe82f90 items=2 ppid=2440 pid=2450 auid=4294967295 uid=0 gid=984 euid=0 suid=0 fsuid=0 egid=984 sgid=984 fsgid=984 tty=(none) ses=4294967295 comm="rm" exe="/usr/bin/rm" subj=system_u:system_r:nsd_t:s0 key=(null)
type=AVC msg=audit(1466754024.321:816): avc:  denied  { unlink } for  pid=2450 comm="rm" name="request.cfg" dev="dm-0" ino=101234804 scontext=system_u:system_r:nsd_t:s0 tcontext=system_u:object_r:nsd_conf_t:s0 tclass=file
type=AVC msg=audit(1466754024.321:816): avc:  denied  { remove_name } for  pid=2450 comm="rm" name="request.cfg" dev="dm-0" ino=101234804 scontext=system_u:system_r:nsd_t:s0 tcontext=system_u:object_r:nsd_conf_t:s0 tclass=dir
----
Comment 6 errata-xmlrpc 2016-11-04 02:32:37 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://rhn.redhat.com/errata/RHBA-2016-2283.html
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