Bug 1386689 - selinux blocks sendmail to send mail
Summary: selinux blocks sendmail to send mail
Keywords:
Status: CLOSED NOTABUG
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: selinux-policy
Version: 7.3
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Lukas Vrabec
QA Contact: BaseOS QE Security Team
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2016-10-19 12:52 UTC by Petr Sklenar
Modified: 2016-10-20 19:36 UTC (History)
6 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2016-10-20 08:50:05 UTC
Target Upstream Version:


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Description Petr Sklenar 2016-10-19 12:52:54 UTC
Description of problem:
selinux blocks sendmail to send mail as mail notification for printing

Version-Release number of selected component (if applicable):
 cups-1.6.3-26.el7.x86_64
 selinux-policy-3.13.1-102.el7.noarch

How reproducible:
always

Steps to Reproduce:
0. have a printer queue testclass
1. setup sendmail by echo "Subject xyz" > /etc/cups/mailto.conf
2. like a user: lp -d testclass -m /etc/fstab
#it should print a file and send a mail notification


Actual results:
time->Mon Oct 17 06:46:42 2016
type=SYSCALL msg=audit(1476701202.187:219): arch=c000003e syscall=2 success=no exit=-13 a0=7f712ebbf400 a1=80000 a2=1b6 a3=24 items=0 ppid=26379 pid=26380 auid=4294967295 uid=4 gid=7 euid=4 suid=4 fsuid=4 egid=51 sgid=51 fsgid=51 tty=(none) ses=4294967295 comm="sendmail" exe="/usr/sbin/sendmail.sendmail" subj=system_u:system_r:system_mail_t:s0-s0:c0.c1023 key=(null)
type=AVC msg=audit(1476701202.187:219): avc:  denied  { open } for  pid=26380 comm="sendmail" path="/etc/services" dev="dm-0" ino=101344203 scontext=system_u:system_r:system_mail_t:s0-s0:c0.c1023 tcontext=system_u:object_r:user_tmp_t:s0 tclass=file
Fail: AVC messages found.

and mail is not send

Expected results:
no denial, mail is sent

Additional info:

Comment 3 Miroslav Grepl 2016-10-20 08:50:05 UTC
Pavel,
this is a problem with labeling.

Execute

# restorecon -R -v /etc/services

to fix labeling. Thank you.

Comment 4 Petr Sklenar 2016-10-20 19:36:48 UTC
I see yes, I am sorry. There were bunch of tests before this one, issue was found there.


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