Re: [gentoo-hardened] grsec denying gradm, system unusuable

[John Tate]

How does it learn about the gradm -E before I've ran it. Running it
kills the system, whereupon there is no /etc/grsec to write any rules
to. I've thought of this, and it doesn't work.

On Tue, Feb 18, 2014 at 10:06 PM, "Tóth Attila" <atoth@××××××××××.hu> wrote:
> Just give gradm learning a try without a prior gradm -E.
> After you can generate an initial set of rules for your policy, you can
> start fine-tuning it for some specific applications.
> --
> dr Tóth Attila, Radiológus, 06-20-825-8057
> Attila Toth MD, Radiologist, [phone]
>
> 2014.Február 17.(H) 23:26 időpontban John Tate ezt írta:
>> BTW, I was supposed to delete the first two lines of that email.
>>
>> On Tue, Feb 18, 2014 at 9:25 AM, John Tate <john@××××××××.org> wrote:
>>> What should that stuff be so gradm works. I tried add
>>>
>>> Also the wiki instructs me to issue gradm -E before putting it in
>>> learning mode.
>>>
>>> I've tried adding some lines to the admin role myself but the same
>>> problem occurs, and gradm can no longer find /dev/grsec..
>>>
>>> role admin sA
>>> subject / rvka
>>>         / rwcdmlxi
>>> subject /sbin/gradm
>>>         /etc/grsec rwx
>>>         /dev/grsec rw
>>>         +CAP_DAC_OVERRIDE
>>>
>>> It would be good if you could just help me get started by giving
>>> enough so that gradm -D will work so I can still work on the system
>>> without a reboot. At this point it is tedious.
>>>
>>> Also either the Wiki page is out of date and the advise no longer
>>> works, or the problem is actually some kernel option I've enabled:
>>> https://wiki.gentoo.org/wiki/Hardened/Grsecurity2_Quickstart
>>>
>>>
>>> On Tue, Feb 18, 2014 at 7:03 AM, "Tóth Attila" <atoth@××××××××××.hu>
>>> wrote:
>>>> I think you should not issue gradm -E before activating learning mode.
>>>> Also make sure to populate your policy with at least some default stuff
>>>> for the admin role before enabling it. The example policy file gives a
>>>> starting point.
>>>> --
>>>> dr Tóth Attila, Radiológus, 06-20-825-8057
>>>> Attila Toth MD, Radiologist, [phone]
>>>>
>>>> 2014.Február 17.(H) 20:29 időpontban John Tate ezt írta:
>>>>> I am new to grsecurity I am having a problem when I enable RBAC, where
>>>>> grsecurity denies gradm and certain directories such as /etc/grsec are
>>>>> inaccessible, and even /dev/grsec.
>>>>>
>>>>> gentoo ~ # gradm -E
>>>>> gentoo ~ # gradm -F -L /etc/grsec/learning.log
>>>>> Could not open /dev/grsec.
>>>>> open: Permission denied
>>>>>
>>>>> /var/log/messages contains this...
>>>>> Feb 16 22:40:56 gentoo kernel: [  659.863486] grsec: From 192.168.0.3:
>>>>> (default:D:/sbin/gradm) use of CAP_DAC_OVERRIDE denied for
>>>>> /sbin/gradm[gradm:3315] uid/euid:0/0 gid/egid:0/0, parent
>>>>> /bin/bash[bash:1876] uid/euid:0/0 gid/egid:0/0
>>>>>
>>>>> CONFIG_GRKERNSEC=y
>>>>> # CONFIG_GRKERNSEC_CONFIG_AUTO is not set
>>>>> CONFIG_GRKERNSEC_CONFIG_CUSTOM=y
>>>>> CONFIG_GRKERNSEC_TPE_UNTRUSTED_GID=101
>>>>> CONFIG_GRKERNSEC_KMEM=y
>>>>> CONFIG_GRKERNSEC_IO=y
>>>>> CONFIG_GRKERNSEC_PERF_HARDEN=y
>>>>> CONFIG_GRKERNSEC_RAND_THREADSTACK=y
>>>>> CONFIG_GRKERNSEC_PROC_MEMMAP=y
>>>>> CONFIG_GRKERNSEC_BRUTE=y
>>>>> CONFIG_GRKERNSEC_MODHARDEN=y
>>>>> CONFIG_GRKERNSEC_HIDESYM=y
>>>>> CONFIG_GRKERNSEC_KERN_LOCKOUT=y
>>>>> # CONFIG_GRKERNSEC_NO_RBAC is not set
>>>>> CONFIG_GRKERNSEC_ACL_HIDEKERN=y
>>>>> CONFIG_GRKERNSEC_ACL_MAXTRIES=3
>>>>> CONFIG_GRKERNSEC_ACL_TIMEOUT=60
>>>>> CONFIG_GRKERNSEC_PROC=y
>>>>> CONFIG_GRKERNSEC_PROC_USER=y
>>>>> CONFIG_GRKERNSEC_PROC_ADD=y
>>>>> CONFIG_GRKERNSEC_LINK=y
>>>>> # CONFIG_GRKERNSEC_SYMLINKOWN is not set
>>>>> CONFIG_GRKERNSEC_FIFO=y
>>>>> CONFIG_GRKERNSEC_SYSFS_RESTRICT=y
>>>>> # CONFIG_GRKERNSEC_ROFS is not set
>>>>> CONFIG_GRKERNSEC_DEVICE_SIDECHANNEL=y
>>>>> CONFIG_GRKERNSEC_CHROOT=y
>>>>> CONFIG_GRKERNSEC_CHROOT_MOUNT=y
>>>>> CONFIG_GRKERNSEC_CHROOT_DOUBLE=y
>>>>> CONFIG_GRKERNSEC_CHROOT_PIVOT=y
>>>>> CONFIG_GRKERNSEC_CHROOT_CHDIR=y
>>>>> CONFIG_GRKERNSEC_CHROOT_CHMOD=y
>>>>> CONFIG_GRKERNSEC_CHROOT_FCHDIR=y
>>>>> CONFIG_GRKERNSEC_CHROOT_MKNOD=y
>>>>> CONFIG_GRKERNSEC_CHROOT_SHMAT=y
>>>>> CONFIG_GRKERNSEC_CHROOT_UNIX=y
>>>>> CONFIG_GRKERNSEC_CHROOT_FINDTASK=y
>>>>> CONFIG_GRKERNSEC_CHROOT_NICE=y
>>>>> CONFIG_GRKERNSEC_CHROOT_SYSCTL=y
>>>>> CONFIG_GRKERNSEC_CHROOT_CAPS=y
>>>>> CONFIG_GRKERNSEC_AUDIT_GROUP=y
>>>>> CONFIG_GRKERNSEC_AUDIT_GID=100
>>>>> CONFIG_GRKERNSEC_EXECLOG=y
>>>>> CONFIG_GRKERNSEC_RESLOG=y
>>>>> CONFIG_GRKERNSEC_CHROOT_EXECLOG=y
>>>>> CONFIG_GRKERNSEC_AUDIT_PTRACE=y
>>>>> CONFIG_GRKERNSEC_AUDIT_CHDIR=y
>>>>> CONFIG_GRKERNSEC_AUDIT_MOUNT=y
>>>>> CONFIG_GRKERNSEC_SIGNAL=y
>>>>> CONFIG_GRKERNSEC_FORKFAIL=y
>>>>> CONFIG_GRKERNSEC_TIME=y
>>>>> CONFIG_GRKERNSEC_PROC_IPADDR=y
>>>>> CONFIG_GRKERNSEC_RWXMAP_LOG=y
>>>>> CONFIG_GRKERNSEC_DMESG=y
>>>>> CONFIG_GRKERNSEC_HARDEN_PTRACE=y
>>>>> CONFIG_GRKERNSEC_PTRACE_READEXEC=y
>>>>> # CONFIG_GRKERNSEC_SETXID is not set
>>>>> CONFIG_GRKERNSEC_TPE=y
>>>>> CONFIG_GRKERNSEC_TPE_ALL=y
>>>>> # CONFIG_GRKERNSEC_TPE_INVERT is not set
>>>>> CONFIG_GRKERNSEC_TPE_GID=101
>>>>> CONFIG_GRKERNSEC_RANDNET=y
>>>>> CONFIG_GRKERNSEC_BLACKHOLE=y
>>>>> CONFIG_GRKERNSEC_NO_SIMULT_CONNECT=y
>>>>> # CONFIG_GRKERNSEC_SOCKET is not set
>>>>> # CONFIG_GRKERNSEC_DENYUSB is not set
>>>>> CONFIG_GRKERNSEC_SYSCTL=y
>>>>> # CONFIG_GRKERNSEC_SYSCTL_DISTRO is not set
>>>>> CONFIG_GRKERNSEC_SYSCTL_ON=y
>>>>> # CONFIG_GRKERNSEC_SELINUX_AVC_LOG_IPADDR is not set
>>>>> CONFIG_GRKERNSEC_FLOODTIME=10
>>>>> CONFIG_GRKERNSEC_FLOODBURST=6
>>>>>
>>>>> Help would really be appreciated to get this working, because I'm
>>>>> quite new to this and I have no idea what I've missed.
>>>>>
>>>>> --
>>>>> www.johntate.org
>>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>> --
>>> www.johntate.org
>>
>>
>>
>> --
>> www.johntate.org
>>
>>
>
>
>



-- 
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