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Bug 965398 - mail delivery causes avc denial
Summary: mail delivery causes avc denial
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: selinux-policy
Version: 7.0
Hardware: All
OS: Linux
medium
high
Target Milestone: beta
: ---
Assignee: Miroslav Grepl
QA Contact: Milos Malik
URL:
Whiteboard:
: 916624 (view as bug list)
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2013-05-21 07:36 UTC by Petr Sklenar
Modified: 2014-06-18 02:21 UTC (History)
4 users (show)

Fixed In Version: selinux-policy-3.12.1-86.el7
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2014-06-13 10:01:55 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)

Description Petr Sklenar 2013-05-21 07:36:14 UTC 
Description of problem:
mail delivery causes avc denial

Version-Release number of selected component (if applicable):
dovecot-2.2.1-3.el7.x86_64
mailx-12.5-8.el7.x86_64
selinux-policy-3.12.1-40.el7.noarch


How reproducible:
always

Steps to Reproduce:
1. alternatives --set mta /usr/sbin/sendmail.postfix
2. /bin/systemctl restart  dovecot.service
3. echo -e 'body-436287\n' |mail -s subj-436287 mailtest@localhost

Actual results:
various avc denials:

----
time->Sat May 18 05:55:01 2013
type=SYSCALL msg=audit(1368852901.798:1166): arch=c000003e syscall=4 success=no exit=-13 a0=7fb07847db07 a1=7fff22f199d0 a2=7fff22f199d0 a3=0 items=0 ppid=18307 pid=18311 auid=4294967295 uid=1003 gid=1006 euid=1003 suid=1003 fsuid=1003 egid=1006 sgid=1006 fsgid=1006 ses=4294967295 tty=(none) comm="deliver" exe="/usr/libexec/dovecot/dovecot-lda" subj=system_u:system_r:dovecot_deliver_t:s0 key=(null)
type=AVC msg=audit(1368852901.798:1166): avc:  denied  { getattr } for  pid=18311 comm="deliver" path="/dev/mqueue" dev="mqueue" ino=6484 scontext=system_u:system_r:dovecot_deliver_t:s0 tcontext=system_u:object_r:tmpfs_t:s0 tclass=dir
----

----
time->Sat May 18 06:36:37 2013
type=AVC msg=audit(1368873397.486:559): avc:  denied  { sys_resource } for  pid=41712 comm="dovecot" capability=24  scontext=system_u:system_r:dovecot_t:s0 tcontext=system_u:system_r:dovecot_t:s0 tclass=capability
Fail: AVC messages found.
--------
----
time->Sat May 18 02:23:04 2013
type=AVC msg=audit(1368858184.111:550): avc:  denied  { getattr } for  pid=3950 comm="deliver" path="/dev/mqueue" dev="mqueue" ino=7025 scontext=system_u:system_r:dovecot_deliver_t:s0 tcontext=system_u:object_r:tmpfs_t:s0 tclass=dir
----
----
time->Sat May 18 06:31:55 2013
type=SYSCALL msg=audit(1368873115.080:945): arch=c000003e syscall=4 success=no exit=-13 a0=7ffa76720b07 a1=7fff987fd270 a2=7fff987fd270 a3=0 items=0 ppid=8705 pid=8706 auid=4294967295 uid=1001 gid=1001 euid=1001 suid=1001 fsuid=1001 egid=1001 sgid=1001 fsgid=1001 ses=4294967295 tty=(none) comm="deliver" exe="/usr/libexec/dovecot/dovecot-lda" subj=system_u:system_r:dovecot_deliver_t:s0 key=(null)
type=AVC msg=audit(1368873115.080:945): avc:  denied  { getattr } for  pid=8706 comm="deliver" path="/dev/pts" dev="devpts" ino=1 scontext=system_u:system_r:dovecot_deliver_t:s0 tcontext=system_u:object_r:devpts_t:s0 tclass=dir
----
time->Sat May 18 06:31:55 2013
type=SYSCALL msg=audit(1368873115.080:946): arch=c000003e syscall=4 success=no exit=-13 a0=7ffa76720b07 a1=7fff987fd270 a2=7fff987fd270 a3=0 items=0 ppid=8705 pid=8706 auid=4294967295 uid=1001 gid=1001 euid=1001 suid=1001 fsuid=1001 egid=1001 sgid=1001 fsgid=1001 ses=4294967295 tty=(none) comm="deliver" exe="/usr/libexec/dovecot/dovecot-lda" subj=system_u:system_r:dovecot_deliver_t:s0 key=(null)
type=AVC msg=audit(1368873115.080:946): avc:  denied  { getattr } for  pid=8706 comm="deliver" path="/sys/fs/pstore" dev="pstore" ino=6565 scontext=system_u:system_r:dovecot_deliver_t:s0 tcontext=system_u:object_r:pstorefs_t:s0 tclass=dir
----


Expected results:
no avd denial

Additional info:
Comment 3 Petr Sklenar 2013-05-21 07:40:56 UTC 
I am sorry its dupe of: bug 916624
anyway how is possible that there are denial only on rhel7? not on F19?

*** This bug has been marked as a duplicate of bug 916624 ***
Comment 4 Miroslav Grepl 2013-05-22 07:25:17 UTC 
Well I see we don't have fixes on F19 too.

# cat /tmp/log |audit2allow


#============= dovecot_deliver_t ==============
allow dovecot_deliver_t devpts_t:dir getattr;
allow dovecot_deliver_t pstorefs_t:dir getattr;
allow dovecot_deliver_t tmpfs_t:dir getattr;


it means we don't have rules. Does mail delivery work correctly?


I would add 

commit f3e68656cd84b9fc76a248a538d1d666618c5a74
Author: Miroslav Grepl <mgrepl>
Date:   Wed May 22 09:23:20 2013 +0200

    Dontaudit to getattr on dirs for dovecot-deliver
Comment 5 Milos Malik 2013-05-22 08:14:24 UTC 
There are more AVCs in the log files. It seems like dovecot is checking various mount points.
----
time->Sat May 18 06:31:55 2013
type=SYSCALL msg=audit(1368873115.079:944): arch=c000003e syscall=4 success=no exit=-13 a0=7ffa76720b06 a1=7fff987fd270 a2=7fff987fd270 a3=0 items=0 ppid=8705 pid=8706 auid=4294967295 uid=1001 gid=1001 euid=1001 suid=1001 fsuid=1001 egid=1001 sgid=1001 fsgid=1001 ses=4294967295 tty=(none) comm="deliver" exe="/usr/libexec/dovecot/dovecot-lda" subj=system_u:system_r:dovecot_deliver_t:s0 key=(null)
type=AVC msg=audit(1368873115.079:944): avc:  denied  { getattr } for  pid=8706 comm="deliver" path="/dev/shm" dev="tmpfs" ino=6553 scontext=system_u:system_r:dovecot_deliver_t:s0 tcontext=system_u:object_r:tmpfs_t:s0 tclass=dir
----
time->Sat May 18 06:31:55 2013
type=SYSCALL msg=audit(1368873115.080:945): arch=c000003e syscall=4 success=no exit=-13 a0=7ffa76720b07 a1=7fff987fd270 a2=7fff987fd270 a3=0 items=0 ppid=8705 pid=8706 auid=4294967295 uid=1001 gid=1001 euid=1001 suid=1001 fsuid=1001 egid=1001 sgid=1001 fsgid=1001 ses=4294967295 tty=(none) comm="deliver" exe="/usr/libexec/dovecot/dovecot-lda" subj=system_u:system_r:dovecot_deliver_t:s0 key=(null)
type=AVC msg=audit(1368873115.080:945): avc:  denied  { getattr } for  pid=8706 comm="deliver" path="/dev/pts" dev="devpts" ino=1 scontext=system_u:system_r:dovecot_deliver_t:s0 tcontext=system_u:object_r:devpts_t:s0 tclass=dir
----
time->Sat May 18 06:31:55 2013
type=SYSCALL msg=audit(1368873115.080:946): arch=c000003e syscall=4 success=no exit=-13 a0=7ffa76720b07 a1=7fff987fd270 a2=7fff987fd270 a3=0 items=0 ppid=8705 pid=8706 auid=4294967295 uid=1001 gid=1001 euid=1001 suid=1001 fsuid=1001 egid=1001 sgid=1001 fsgid=1001 ses=4294967295 tty=(none) comm="deliver" exe="/usr/libexec/dovecot/dovecot-lda" subj=system_u:system_r:dovecot_deliver_t:s0 key=(null)
type=AVC msg=audit(1368873115.080:946): avc:  denied  { getattr } for  pid=8706 comm="deliver" path="/sys/fs/pstore" dev="pstore" ino=6565 scontext=system_u:system_r:dovecot_deliver_t:s0 tcontext=system_u:object_r:pstorefs_t:s0 tclass=dir
----
time->Sat May 18 06:31:55 2013
type=SYSCALL msg=audit(1368873115.080:947): arch=c000003e syscall=4 success=no exit=-13 a0=7ffa76720b0a a1=7fff987fd270 a2=7fff987fd270 a3=0 items=0 ppid=8705 pid=8706 auid=4294967295 uid=1001 gid=1001 euid=1001 suid=1001 fsuid=1001 egid=1001 sgid=1001 fsgid=1001 ses=4294967295 tty=(none) comm="deliver" exe="/usr/libexec/dovecot/dovecot-lda" subj=system_u:system_r:dovecot_deliver_t:s0 key=(null)
type=AVC msg=audit(1368873115.080:947): avc:  denied  { getattr } for  pid=8706 comm="deliver" path="/proc/sys/fs/binfmt_misc" dev="binfmt_misc" ino=1 scontext=system_u:system_r:dovecot_deliver_t:s0 tcontext=system_u:object_r:binfmt_misc_fs_t:s0 tclass=dir
----
time->Sat May 18 06:31:55 2013
type=SYSCALL msg=audit(1368873115.081:948): arch=c000003e syscall=4 success=no exit=-13 a0=7ffa76720b07 a1=7fff987fd270 a2=7fff987fd270 a3=0 items=0 ppid=8705 pid=8706 auid=4294967295 uid=1001 gid=1001 euid=1001 suid=1001 fsuid=1001 egid=1001 sgid=1001 fsgid=1001 ses=4294967295 tty=(none) comm="deliver" exe="/usr/libexec/dovecot/dovecot-lda" subj=system_u:system_r:dovecot_deliver_t:s0 key=(null)
type=AVC msg=audit(1368873115.081:948): avc:  denied  { getattr } for  pid=8706 comm="deliver" path="/dev/mqueue" dev="mqueue" ino=6487 scontext=system_u:system_r:dovecot_deliver_t:s0 tcontext=system_u:object_r:tmpfs_t:s0 tclass=dir
----
time->Sat May 18 06:31:55 2013
type=SYSCALL msg=audit(1368873115.081:949): arch=c000003e syscall=4 success=no exit=-13 a0=7ffa76720b0a a1=7fff987fd270 a2=7fff987fd270 a3=0 items=0 ppid=8705 pid=8706 auid=4294967295 uid=1001 gid=1001 euid=1001 suid=1001 fsuid=1001 egid=1001 sgid=1001 fsgid=1001 ses=4294967295 tty=(none) comm="deliver" exe="/usr/libexec/dovecot/dovecot-lda" subj=system_u:system_r:dovecot_deliver_t:s0 key=(null)
type=AVC msg=audit(1368873115.081:949): avc:  denied  { getattr } for  pid=8706 comm="deliver" path="/dev/hugepages" dev="hugetlbfs" ino=10929 scontext=system_u:system_r:dovecot_deliver_t:s0 tcontext=system_u:object_r:hugetlbfs_t:s0 tclass=dir
----
time->Sat May 18 06:31:55 2013
type=SYSCALL msg=audit(1368873115.081:950): arch=c000003e syscall=4 success=no exit=-13 a0=7ffa76720b09 a1=7fff987fd270 a2=7fff987fd270 a3=0 items=0 ppid=8705 pid=8706 auid=4294967295 uid=1001 gid=1001 euid=1001 suid=1001 fsuid=1001 egid=1001 sgid=1001 fsgid=1001 ses=4294967295 tty=(none) comm="deliver" exe="/usr/libexec/dovecot/dovecot-lda" subj=system_u:system_r:dovecot_deliver_t:s0 key=(null)
type=AVC msg=audit(1368873115.081:950): avc:  denied  { getattr } for  pid=8706 comm="deliver" path="/sys/kernel/config" dev="configfs" ino=10930 scontext=system_u:system_r:dovecot_deliver_t:s0 tcontext=system_u:object_r:configfs_t:s0 tclass=dir
----
time->Sat May 18 06:31:55 2013
type=SYSCALL msg=audit(1368873115.082:951): arch=c000003e syscall=4 success=no exit=-13 a0=7ffa76720b0c a1=7fff987fd270 a2=7fff987fd270 a3=0 items=0 ppid=8705 pid=8706 auid=4294967295 uid=1001 gid=1001 euid=1001 suid=1001 fsuid=1001 egid=1001 sgid=1001 fsgid=1001 ses=4294967295 tty=(none) comm="deliver" exe="/usr/libexec/dovecot/dovecot-lda" subj=system_u:system_r:dovecot_deliver_t:s0 key=(null)
type=AVC msg=audit(1368873115.082:951): avc:  denied  { getattr } for  pid=8706 comm="deliver" path="/proc/sys/fs/binfmt_misc" dev="binfmt_misc" ino=1 scontext=system_u:system_r:dovecot_deliver_t:s0 tcontext=system_u:object_r:binfmt_misc_fs_t:s0 tclass=dir
----
Comment 6 Miroslav Grepl 2013-06-04 13:49:17 UTC 
*** Bug 916624 has been marked as a duplicate of this bug. ***
Comment 7 Miroslav Grepl 2013-06-04 14:00:43 UTC 
And how about the latest selinux-policy builds?
Comment 10 Miroslav Grepl 2013-07-22 08:24:28 UTC 
#!!!! This avc has a dontaudit rule in the current policy
allow dovecot_deliver_t binfmt_misc_fs_t:dir getattr;
allow dovecot_deliver_t configfs_t:dir getattr;

#!!!! This avc has a dontaudit rule in the current policy
allow dovecot_deliver_t devpts_t:dir getattr;

#!!!! This avc has a dontaudit rule in the current policy
allow dovecot_deliver_t hugetlbfs_t:dir getattr;
allow dovecot_deliver_t pstorefs_t:dir getattr;

#!!!! This avc has a dontaudit rule in the current policy
allow dovecot_deliver_t tmpfs_t:dir getattr;
Comment 14 Ludek Smid 2014-06-13 10:01:55 UTC 
This request was resolved in Red Hat Enterprise Linux 7.0.

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