Bug 1033222 - SELinux prevents watchdog from reading /etc/passwd file
Summary: SELinux prevents watchdog from reading /etc/passwd file
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
medium
Target Milestone: rc
: ---
Assignee: Miroslav Grepl
QA Contact: Milos Malik
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2013-11-21 17:56 UTC by Milos Malik
Modified: 2015-02-18 17:21 UTC (History)
0 users

Fixed In Version: selinux-policy-3.12.1-106.el7
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2014-06-13 09:42:02 UTC
Target Upstream Version:


Attachments (Terms of Use)

Description Milos Malik 2013-11-21 17:56:09 UTC
Description of problem:
 * be careful - the scenario causes a reboot of your machine

Version-Release number of selected component (if applicable):
selinux-policy-3.12.1-103.el7.noarch
selinux-policy-devel-3.12.1-103.el7.noarch
selinux-policy-doc-3.12.1-103.el7.noarch
selinux-policy-minimum-3.12.1-103.el7.noarch
selinux-policy-mls-3.12.1-103.el7.noarch
selinux-policy-targeted-3.12.1-103.el7.noarch
watchdog-5.13-9.el7.x86_64

How reproducible:
always

Steps to Reproduce:
1. get a RHEL-7.0 machine with targeted policy
2. add following line to /etc/watchdog.conf
test-binary            = 1
3. service watchdog restart
4. search for AVCs

Actual results (enforcing mode):
----
type=PATH msg=audit(11/21/2013 18:49:23.503:534) : item=0 name=/etc/passwd inode=9326547 dev=fd:03 mode=file,644 ouid=root ogid=root rdev=00:00 obj=system_u:object_r:passwd_file_t:s0 objtype=NORMAL 
type=CWD msg=audit(11/21/2013 18:49:23.503:534) :  cwd=/ 
type=SYSCALL msg=audit(11/21/2013 18:49:23.503:534) : arch=x86_64 syscall=open success=no exit=-13(Permission denied) a0=0x7fbbd799141a a1=O_RDONLY|O_CLOEXEC a2=0x1b6 a3=0x0 items=1 ppid=2524 pid=2526 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=sh exe=/usr/bin/bash subj=system_u:system_r:watchdog_t:s0 key=(null) 
type=AVC msg=audit(11/21/2013 18:49:23.503:534) : avc:  denied  { read } for  pid=2526 comm=sh name=passwd dev="vda3" ino=9326547 scontext=system_u:system_r:watchdog_t:s0 tcontext=system_u:object_r:passwd_file_t:s0 tclass=file 
----

Expected results:
 * no AVCs

Comment 1 Milos Malik 2013-11-21 17:59:06 UTC
Actual results (permissive mode):
----
type=PATH msg=audit(11/21/2013 18:57:53.770:564) : item=0 name=/etc/passwd inode=9326547 dev=fd:03 mode=file,644 ouid=root ogid=root rdev=00:00 obj=system_u:object_r:passwd_file_t:s0 objtype=NORMAL 
type=CWD msg=audit(11/21/2013 18:57:53.770:564) :  cwd=/ 
type=SYSCALL msg=audit(11/21/2013 18:57:53.770:564) : arch=x86_64 syscall=open success=yes exit=1 a0=0x7f4bd0b3b41a a1=O_RDONLY|O_CLOEXEC a2=0x1b6 a3=0x0 items=1 ppid=2933 pid=2935 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=sh exe=/usr/bin/bash subj=system_u:system_r:watchdog_t:s0 key=(null) 
type=AVC msg=audit(11/21/2013 18:57:53.770:564) : avc:  denied  { open } for  pid=2935 comm=sh path=/etc/passwd dev="vda3" ino=9326547 scontext=system_u:system_r:watchdog_t:s0 tcontext=system_u:object_r:passwd_file_t:s0 tclass=file 
type=AVC msg=audit(11/21/2013 18:57:53.770:564) : avc:  denied  { read } for  pid=2935 comm=sh name=passwd dev="vda3" ino=9326547 scontext=system_u:system_r:watchdog_t:s0 tcontext=system_u:object_r:passwd_file_t:s0 tclass=file 
----
type=SYSCALL msg=audit(11/21/2013 18:57:53.770:565) : arch=x86_64 syscall=fstat success=yes exit=0 a0=0x1 a1=0x7fff2e6d8da0 a2=0x7fff2e6d8da0 a3=0x0 items=0 ppid=2933 pid=2935 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=sh exe=/usr/bin/bash subj=system_u:system_r:watchdog_t:s0 key=(null) 
type=AVC msg=audit(11/21/2013 18:57:53.770:565) : avc:  denied  { getattr } for  pid=2935 comm=sh path=/etc/passwd dev="vda3" ino=9326547 scontext=system_u:system_r:watchdog_t:s0 tcontext=system_u:object_r:passwd_file_t:s0 tclass=file 
----

Comment 2 Miroslav Grepl 2013-11-21 19:32:41 UTC
Already added to Fedora.

Comment 4 Ludek Smid 2014-06-13 09:42:02 UTC
This request was resolved in Red Hat Enterprise Linux 7.0.

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