Re: grsec denying gradm, system unusuable

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Also either the Wiki page is out of date and the advise no longer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" <[email protected]> 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, +36-20-825-8057
>
> 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