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

[Tóth Attila]

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 Also either the Wiki page is out of date and the advise no longer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
>
>