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

[Tóth Attila]

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
>