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

[John Tate]

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 Also either the Wiki page is out of date and the advise no longer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