SELinux is preventing sh from getattr access on the file /usr/sbin/ldconfig.

[Ed Greshko]

On 06/29/15 18:09, Daniel J Walsh wrote:
>
> On 06/28/2015 07:53 AM, Suvayu Ali wrote:
>> On Sun, Jun 28, 2015 at 06:04:38AM -0400, Daniel J Walsh wrote:
>>> On 06/27/2015 07:01 PM, Ed Greshko wrote:
>>>> On 06/27/15 21:15, Andras Simon wrote:
>>>>> 2015-06-27 15:11 GMT+02:00, Andras Simon <szajmi at gmail.com>:
>>>>>> Should I be worried about the $subject?
>>>>> And there's also a "SELinux is preventing sh from execute access on
>>>>> the file /usr/sbin/ldconfig" which I've only just noticed. It sounds
>>>>> even scarier.
>>>>>
>>>> Does your output match these?
>>>>
>>>> [egreshko at meimei ~]$ ls -Z /bin/bash
>>>> system_u:object_r:shell_exec_t:s0 /bin/bash
>>>>
>>>> [egreshko at meimei ~]$ ls -Z /usr/sbin/ldconfig
>>>> system_u:object_r:ldconfig_exec_t:s0 /usr/sbin/ldconfig
>>>>
>>> Do you have the avc's?
>>>
>>> ausearch -m avc
>> I also saw these alerts during a package update.
>>
>> time->Thu Jun 25 17:56:49 2015
>> type=PROCTITLE msg=audit(1435247809.870:4079): proctitle=7368002D63002F7362696E2F6C64636F6E666967202D7020323E2F6465762F6E756C6C
>> type=SYSCALL msg=audit(1435247809.870:4079): arch=c000003e syscall=59 success=no exit=-13 a0=7f955d728b00 a1=7f955d728c00 a2=7f955d727c40 a3=7fffc7dab900 items=0 ppid=30356 pid=30357 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="sh" exe="/usr/bin/bash" subj=system_u:system_r:firewalld_t:s0 key=(null)
>> type=AVC msg=audit(1435247809.870:4079): avc:  denied  { execute } for  pid=30357 comm="sh" name="ldconfig" dev="sdb1" ino=450673 scontext=system_u:system_r:firewalld_t:s0 tcontext=system_u:object_r:ldconfig_exec_t:s0 tclass=file permissive=0
>> ----
>> time->Thu Jun 25 17:56:49 2015
>> type=PROCTITLE msg=audit(1435247809.870:4080): proctitle=7368002D63002F7362696E2F6C64636F6E666967202D7020323E2F6465762F6E756C6C
>> type=SYSCALL msg=audit(1435247809.870:4080): arch=c000003e syscall=4 success=no exit=-13 a0=7f955d728b00 a1=7fffc7dab9b0 a2=7fffc7dab9b0 a3=7fffc7dab900 items=0 ppid=30356 pid=30357 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="sh" exe="/usr/bin/bash" subj=system_u:system_r:firewalld_t:s0 key=(null)
>> type=AVC msg=audit(1435247809.870:4080): avc:  denied  { getattr } for  pid=30357 comm="sh" path="/usr/sbin/ldconfig" dev="sdb1" ino=450673 scontext=system_u:system_r:firewalld_t:s0 tcontext=system_u:object_r:ldconfig_exec_t:s0 tclass=file permissive=0
>> ----
>> time->Thu Jun 25 17:56:49 2015
>> type=PROCTITLE msg=audit(1435247809.870:4081): proctitle=7368002D63002F7362696E2F6C64636F6E666967202D7020323E2F6465762F6E756C6C
>> type=SYSCALL msg=audit(1435247809.870:4081): arch=c000003e syscall=4 success=no exit=-13 a0=7f955d728b00 a1=7fffc7dab990 a2=7fffc7dab990 a3=7fffc7dab900 items=0 ppid=30356 pid=30357 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="sh" exe="/usr/bin/bash" subj=system_u:system_r:firewalld_t:s0 key=(null)
>> type=AVC msg=audit(1435247809.870:4081): avc:  denied  { getattr } for  pid=30357 comm="sh" path="/usr/sbin/ldconfig" dev="sdb1" ino=450673 scontext=system_u:system_r:firewalld_t:s0 tcontext=system_u:object_r:ldconfig_exec_t:s0 tclass=file permissive=0
>>
> This is very strange.  Doing ldconfig during a package update is
> expected, but why would firewalld be executing it. 
> ps -eZ | grep firewalld
>
[root at meimei ~]# ps -eZ | grep firewalld
system_u:system_r:firewalld_t:s0  781 ?        00:00:00 firewalld


-- 
Sorta what I want to say when folks habitually complain about Fedora - https://youtu.be/ZArl8fTfub4