Re: selinux, sendmail, and disable_ipv6

Hi, Lukas,

Lukas Vrabec wrote:
>
> I believe you'll find answer here:
>
> https://danwalsh.livejournal.com/47118.html

But we don't *want* to disable IPv6. We rolled it out several  years ago.

      mark
>
> Thanks,
> Lukas.
>
>
> On 11/21/18 7:18 PM, mark wrote:
>
>> Hi, Lukas,
>>
>>
>> Lukas Vrabec wrote:
>>
>>>
>>> Could you reproduce your issue and then attach output of:
>>>
>>>
>>> # ausearch -m AVC -m USER_AVC -ts today
>>>
>>>
>> Here's an abbreviated o/p, as in this happened at 11:08 today:
>> time->Wed Nov 21 11:08:55 2018 type=PROCTITLE
>> msg=audit(1542816535.125:26908):
>> proctitle=2F7573722F7362696E2F73656E646D61696C002D4643726F6E4461656D6F6E
>> 002D69002D6F6469002D6F656D002D6F69002D74002D6600726F6F74
>> type=SYSCALL msg=audit(1542816535.125:26908): arch=c000003e syscall=2
>> success=yes exit=3 a0=7f52d568d0b8 a1=80000 a2=1b6 a3=24 items=0
>> ppid=54786 pid=55276 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=51
>> sgid=51 fsgid=51 tty=(none) ses=935 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(1542816535.125:26908): avc:  denied  { open } for
>> pid=55276 comm="sendmail"
>> path="/proc/sys/net/ipv6/conf/all/disable_ipv6" dev="proc" ino=25607
>> scontext=system_u:system_r:system_mail_t:s0-s0:c0.c1023
>> tcontext=system_u:object_r:sysctl_net_t:s0 tclass=file
>> type=AVC msg=audit(1542816535.125:26908): avc:  denied  { read } for
>> pid=55276 comm="sendmail" name="disable_ipv6" dev="proc" ino=25607
>> scontext=system_u:system_r:system_mail_t:s0-s0:c0.c1023
>> tcontext=system_u:object_r:sysctl_net_t:s0 tclass=file
>> ----
>> time->Wed Nov 21 11:08:55 2018 type=PROCTITLE
>> msg=audit(1542816535.125:26909):
>> proctitle=2F7573722F7362696E2F73656E646D61696C002D4643726F6E4461656D6F6E
>> 002D69002D6F6469002D6F656D002D6F69002D74002D6600726F6F74
>> type=SYSCALL msg=audit(1542816535.125:26909): arch=c000003e syscall=5
>> success=yes exit=0 a0=3 a1=7fff06a576c0 a2=7fff06a576c0 a3=0 items=0
>> ppid=54786 pid=55276 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=51
>> sgid=51 fsgid=51 tty=(none) ses=935 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(1542816535.125:26909): avc:  denied  { getattr } for
>> pid=55276 comm="sendmail"
>> path="/proc/sys/net/ipv6/conf/all/disable_ipv6" dev="proc" ino=25607
>> scontext=system_u:system_r:system_mail_t:s0-s0:c0.c1023
>> tcontext=system_u:object_r:sysctl_net_t:s0 tclass=file
>>
>>
>> mark
>>
>
>
> --
> Lukas Vrabec
> Software Engineer, Security Technologies
> Red Hat, Inc.
>
>
>

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