Dear list,
making use of http://list.linux-vserver.org/archive/vserver/msg11839.html
I recently patched a 2.6.14.5-Kernel as my first contact with VServer.
After starting vprocunhide (from package util-vserver) on the Sarge system
I tried to create a first box:
vserver vhost0 build -m debootstrap --hostname vhost0.DOMAINNAME.de
--force --context 50 -- -d sarge -m http://update.pureserver.info/debian
After extracting all packages the process breaks...
W: Failure trying to run: chroot /etc/vservers/.defaults/vdirbase/vhost0
mount -t proc proc /proc
...while dmesg says:
grsec: From MYIPADDRESS: denied mount of proc as
/home/vservers/vhost0/proc from chroot by
/home/vservers/vhost0/bin/mount[mount:105] uid/euid:0/0 gid/egid:0/0, parent
/var/tmp/debootstrap.6KTNNr/usr/sbin/debootstrap[debootstrap:5863]
uid/euid:0/0 gid/egid:0/0
I assume this prevention is connected to Grsecurity's /proc-hiding, the
relevant parts of the current kernel configuration follow below. In case
this is correct, Grsecurity offers various ways of CONFIG_GRKERNSEC_PROC
-- but I've got no idea, which one is the right ;-)
Any advise from your side on a better configuration regarding the needs of
Vserver is appreciated!
Thanks in advance,
Thorsten
*** configuration 2.6.14.5 ***
#
# Linux VServer
#
CONFIG_VSERVER_LEGACY=y
# CONFIG_VSERVER_LEGACY_VERSION is not set
CONFIG_VSERVER_DYNAMIC_IDS=y
# CONFIG_VSERVER_NGNET is not set
CONFIG_VSERVER_COWBL=y
CONFIG_VSERVER_PROC_SECURE=y
# CONFIG_VSERVER_HARDCPU is not set
# CONFIG_INOXID_NONE is not set
# CONFIG_INOXID_UID16 is not set
# CONFIG_INOXID_GID16 is not set
CONFIG_INOXID_UGID24=y
# CONFIG_INOXID_INTERN is not set
# CONFIG_INOXID_RUNTIME is not set
# CONFIG_XID_TAG_NFSD is not set
# CONFIG_XID_PROPAGATE is not set
# CONFIG_VSERVER_DEBUG is not set
#
# Security options
#
#
# PaX
#
CONFIG_PAX=y
#
# PaX Control
#
# CONFIG_PAX_SOFTMODE is not set
CONFIG_PAX_EI_PAX=y
CONFIG_PAX_PT_PAX_FLAGS=y
# CONFIG_PAX_NO_ACL_FLAGS is not set
CONFIG_PAX_HAVE_ACL_FLAGS=y
# CONFIG_PAX_HOOK_ACL_FLAGS is not set
#
# Non-executable pages
#
CONFIG_PAX_NOEXEC=y
# CONFIG_PAX_PAGEEXEC is not set
CONFIG_PAX_SEGMEXEC=y
# CONFIG_PAX_EMUTRAMP is not set
CONFIG_PAX_MPROTECT=y
# CONFIG_PAX_NOELFRELOCS is not set
CONFIG_PAX_KERNEXEC=y
#
# Address Space Layout Randomization
#
CONFIG_PAX_ASLR=y
CONFIG_PAX_RANDKSTACK=y
CONFIG_PAX_RANDUSTACK=y
CONFIG_PAX_RANDMMAP=y
CONFIG_PAX_NOVSYSCALL=y
#
# Grsecurity
#
CONFIG_GRKERNSEC=y
# CONFIG_GRKERNSEC_LOW is not set
# CONFIG_GRKERNSEC_MEDIUM is not set
CONFIG_GRKERNSEC_HIGH=y
# CONFIG_GRKERNSEC_CUSTOM is not set
#
# Address Space Protection
#
CONFIG_GRKERNSEC_KMEM=y
# CONFIG_GRKERNSEC_IO is not set
CONFIG_GRKERNSEC_PROC_MEMMAP=y
CONFIG_GRKERNSEC_BRUTE=y
CONFIG_GRKERNSEC_HIDESYM=y
#
# Role Based Access Control Options
#
# CONFIG_GRKERNSEC_ACL_HIDEKERN is not set
CONFIG_GRKERNSEC_ACL_MAXTRIES=3
CONFIG_GRKERNSEC_ACL_TIMEOUT=30
#
# Filesystem Protections
#
CONFIG_GRKERNSEC_PROC=y
# CONFIG_GRKERNSEC_PROC_USER is not set
CONFIG_GRKERNSEC_PROC_USERGROUP=y
CONFIG_GRKERNSEC_PROC_GID=1001
CONFIG_GRKERNSEC_PROC_ADD=y
CONFIG_GRKERNSEC_LINK=y
CONFIG_GRKERNSEC_FIFO=y
# CONFIG_GRKERNSEC_CHROOT is not set
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
#
# Kernel Auditing
#
# CONFIG_GRKERNSEC_AUDIT_GROUP is not set
# CONFIG_GRKERNSEC_EXECLOG is not set
CONFIG_GRKERNSEC_RESLOG=y
# CONFIG_GRKERNSEC_CHROOT_EXECLOG is not set
# CONFIG_GRKERNSEC_AUDIT_CHDIR is not set
CONFIG_GRKERNSEC_AUDIT_MOUNT=y
# CONFIG_GRKERNSEC_AUDIT_IPC is not set
CONFIG_GRKERNSEC_SIGNAL=y
CONFIG_GRKERNSEC_FORKFAIL=y
CONFIG_GRKERNSEC_TIME=y
# CONFIG_GRKERNSEC_PROC_IPADDR is not set
# CONFIG_GRKERNSEC_AUDIT_TEXTREL is not set
#
# Executable Protections
#
CONFIG_GRKERNSEC_EXECVE=y
CONFIG_GRKERNSEC_SHM=y
CONFIG_GRKERNSEC_DMESG=y
CONFIG_GRKERNSEC_RANDPID=y
# CONFIG_GRKERNSEC_TPE is not set
#
# Network Protections
#
CONFIG_GRKERNSEC_RANDNET=y
CONFIG_GRKERNSEC_RANDSRC=y
# CONFIG_GRKERNSEC_SOCKET is not set
#
# Sysctl support
#
# CONFIG_GRKERNSEC_SYSCTL is not set
#
# Logging Options
#
CONFIG_GRKERNSEC_FLOODTIME=10
CONFIG_GRKERNSEC_FLOODBURST=4
# CONFIG_KEYS is not set
# CONFIG_SECURITY is not set
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Received on Wed Feb 8 08:07:27 2006