1160 lines
23 KiB
C
1160 lines
23 KiB
C
/* $NetBSD: secmodel_bsd44_suser.c,v 1.67 2009/05/08 11:09:43 elad Exp $ */
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/*-
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* Copyright (c) 2006 Elad Efrat <elad@NetBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* This file contains kauth(9) listeners needed to implement the traditional
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* NetBSD superuser access restrictions.
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*
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* There are two main resources a request can be issued to: user-owned and
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* system owned. For the first, traditional Unix access checks are done, as
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* well as superuser checks. If needed, the request context is examined before
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* a decision is made. For the latter, usually only superuser checks are done
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* as normal users are not allowed to access system resources.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: secmodel_bsd44_suser.c,v 1.67 2009/05/08 11:09:43 elad Exp $");
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/kauth.h>
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#include <sys/acct.h>
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#include <sys/mutex.h>
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#include <sys/ktrace.h>
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#include <sys/mount.h>
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#include <sys/pset.h>
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#include <sys/socketvar.h>
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#include <sys/sysctl.h>
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#include <sys/tty.h>
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#include <net/route.h>
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#include <sys/ptrace.h>
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#include <sys/vnode.h>
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#include <sys/proc.h>
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#include <sys/uidinfo.h>
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#include <miscfs/procfs/procfs.h>
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#include <secmodel/bsd44/suser.h>
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extern int dovfsusermount;
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static kauth_listener_t l_generic, l_system, l_process, l_network, l_machdep,
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l_device;
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void
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secmodel_bsd44_suser_start(void)
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{
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l_generic = kauth_listen_scope(KAUTH_SCOPE_GENERIC,
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secmodel_bsd44_suser_generic_cb, NULL);
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l_system = kauth_listen_scope(KAUTH_SCOPE_SYSTEM,
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secmodel_bsd44_suser_system_cb, NULL);
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l_process = kauth_listen_scope(KAUTH_SCOPE_PROCESS,
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secmodel_bsd44_suser_process_cb, NULL);
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l_network = kauth_listen_scope(KAUTH_SCOPE_NETWORK,
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secmodel_bsd44_suser_network_cb, NULL);
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l_machdep = kauth_listen_scope(KAUTH_SCOPE_MACHDEP,
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secmodel_bsd44_suser_machdep_cb, NULL);
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l_device = kauth_listen_scope(KAUTH_SCOPE_DEVICE,
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secmodel_bsd44_suser_device_cb, NULL);
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}
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#if defined(_LKM)
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void
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secmodel_bsd44_suser_stop(void)
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{
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kauth_unlisten_scope(l_generic);
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kauth_unlisten_scope(l_system);
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kauth_unlisten_scope(l_process);
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kauth_unlisten_scope(l_network);
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kauth_unlisten_scope(l_machdep);
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kauth_unlisten_scope(l_device);
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}
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#endif /* _LKM */
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/*
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* kauth(9) listener
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*
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* Security model: Traditional NetBSD
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* Scope: Generic
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* Responsibility: Superuser access
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*/
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int
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secmodel_bsd44_suser_generic_cb(kauth_cred_t cred, kauth_action_t action,
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void *cookie, void *arg0, void *arg1,
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void *arg2, void *arg3)
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{
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bool isroot;
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int result;
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isroot = (kauth_cred_geteuid(cred) == 0);
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result = KAUTH_RESULT_DEFER;
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switch (action) {
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case KAUTH_GENERIC_ISSUSER:
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if (isroot)
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result = KAUTH_RESULT_ALLOW;
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break;
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case KAUTH_GENERIC_CANSEE:
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if (!secmodel_bsd44_curtain)
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result = KAUTH_RESULT_ALLOW;
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else if (isroot || kauth_cred_uidmatch(cred, arg0))
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result = KAUTH_RESULT_ALLOW;
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break;
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default:
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result = KAUTH_RESULT_DEFER;
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break;
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}
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return (result);
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}
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/*
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* kauth(9) listener
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*
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* Security model: Traditional NetBSD
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* Scope: System
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* Responsibility: Superuser access
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*/
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int
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secmodel_bsd44_suser_system_cb(kauth_cred_t cred, kauth_action_t action,
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void *cookie, void *arg0, void *arg1,
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void *arg2, void *arg3)
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{
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bool isroot;
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int result;
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enum kauth_system_req req;
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isroot = (kauth_cred_geteuid(cred) == 0);
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result = KAUTH_RESULT_DEFER;
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req = (enum kauth_system_req)arg0;
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switch (action) {
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case KAUTH_SYSTEM_CPU:
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switch (req) {
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case KAUTH_REQ_SYSTEM_CPU_SETSTATE:
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if (isroot)
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result = KAUTH_RESULT_ALLOW;
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break;
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default:
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break;
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}
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break;
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case KAUTH_SYSTEM_FS_QUOTA:
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switch (req) {
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case KAUTH_REQ_SYSTEM_FS_QUOTA_GET:
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case KAUTH_REQ_SYSTEM_FS_QUOTA_ONOFF:
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case KAUTH_REQ_SYSTEM_FS_QUOTA_MANAGE:
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case KAUTH_REQ_SYSTEM_FS_QUOTA_NOLIMIT:
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if (isroot)
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result = KAUTH_RESULT_ALLOW;
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break;
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default:
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break;
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}
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break;
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case KAUTH_SYSTEM_FS_RESERVEDSPACE:
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if (isroot)
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result = KAUTH_RESULT_ALLOW;
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break;
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case KAUTH_SYSTEM_MOUNT:
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switch (req) {
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case KAUTH_REQ_SYSTEM_MOUNT_GET:
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result = KAUTH_RESULT_ALLOW;
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break;
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case KAUTH_REQ_SYSTEM_MOUNT_NEW:
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if (isroot)
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result = KAUTH_RESULT_ALLOW;
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else if (dovfsusermount) {
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struct vnode *vp = arg1;
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u_long flags = (u_long)arg2;
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if (!(flags & MNT_NODEV) ||
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!(flags & MNT_NOSUID))
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break;
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if ((vp->v_mount->mnt_flag & MNT_NOEXEC) &&
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!(flags & MNT_NOEXEC))
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break;
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result = KAUTH_RESULT_ALLOW;
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}
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break;
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case KAUTH_REQ_SYSTEM_MOUNT_UNMOUNT:
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if (isroot)
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result = KAUTH_RESULT_ALLOW;
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else {
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struct mount *mp = arg1;
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if (mp->mnt_stat.f_owner ==
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kauth_cred_geteuid(cred))
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result = KAUTH_RESULT_ALLOW;
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}
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break;
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case KAUTH_REQ_SYSTEM_MOUNT_UPDATE:
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if (isroot)
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result = KAUTH_RESULT_ALLOW;
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else if (dovfsusermount) {
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struct mount *mp = arg1;
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u_long flags = (u_long)arg2;
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/* No exporting for non-root. */
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if (flags & MNT_EXPORTED)
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break;
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if (!(flags & MNT_NODEV) ||
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!(flags & MNT_NOSUID))
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break;
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/*
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* Only super-user, or user that did the mount,
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* can update.
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*/
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if (mp->mnt_stat.f_owner !=
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kauth_cred_geteuid(cred))
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break;
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/* Retain 'noexec'. */
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if ((mp->mnt_flag & MNT_NOEXEC) &&
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!(flags & MNT_NOEXEC))
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break;
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result = KAUTH_RESULT_ALLOW;
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}
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break;
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default:
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result = KAUTH_RESULT_DEFER;
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break;
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}
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break;
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case KAUTH_SYSTEM_PSET: {
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psetid_t id;
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id = (psetid_t)(unsigned long)arg1;
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switch (req) {
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case KAUTH_REQ_SYSTEM_PSET_ASSIGN:
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case KAUTH_REQ_SYSTEM_PSET_BIND:
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if (isroot || id == PS_QUERY)
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result = KAUTH_RESULT_ALLOW;
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break;
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case KAUTH_REQ_SYSTEM_PSET_CREATE:
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case KAUTH_REQ_SYSTEM_PSET_DESTROY:
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if (isroot)
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result = KAUTH_RESULT_ALLOW;
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break;
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default:
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break;
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}
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break;
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}
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case KAUTH_SYSTEM_TIME:
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switch (req) {
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case KAUTH_REQ_SYSTEM_TIME_ADJTIME:
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case KAUTH_REQ_SYSTEM_TIME_NTPADJTIME:
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case KAUTH_REQ_SYSTEM_TIME_TIMECOUNTERS:
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if (isroot)
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result = KAUTH_RESULT_ALLOW;
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break;
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case KAUTH_REQ_SYSTEM_TIME_SYSTEM: {
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bool device_context = (bool)arg3;
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if (device_context || isroot)
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result = KAUTH_RESULT_ALLOW;
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break;
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}
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case KAUTH_REQ_SYSTEM_TIME_RTCOFFSET:
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if (isroot)
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result = KAUTH_RESULT_ALLOW;
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break;
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default:
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result = KAUTH_RESULT_DEFER;
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break;
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}
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break;
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case KAUTH_SYSTEM_SYSCTL:
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switch (req) {
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case KAUTH_REQ_SYSTEM_SYSCTL_ADD:
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case KAUTH_REQ_SYSTEM_SYSCTL_DELETE:
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case KAUTH_REQ_SYSTEM_SYSCTL_DESC:
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case KAUTH_REQ_SYSTEM_SYSCTL_MODIFY:
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case KAUTH_REQ_SYSTEM_SYSCTL_PRVT:
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if (isroot)
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result = KAUTH_RESULT_ALLOW;
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break;
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default:
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break;
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}
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break;
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case KAUTH_SYSTEM_SWAPCTL:
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case KAUTH_SYSTEM_ACCOUNTING:
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case KAUTH_SYSTEM_REBOOT:
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case KAUTH_SYSTEM_CHROOT:
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case KAUTH_SYSTEM_FILEHANDLE:
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case KAUTH_SYSTEM_MKNOD:
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if (isroot)
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result = KAUTH_RESULT_ALLOW;
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break;
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case KAUTH_SYSTEM_DEBUG:
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switch (req) {
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case KAUTH_REQ_SYSTEM_DEBUG_IPKDB:
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default:
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/* Decisions are root-agnostic. */
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result = KAUTH_RESULT_ALLOW;
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break;
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}
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break;
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case KAUTH_SYSTEM_CHSYSFLAGS:
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/*
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* Needs to be checked in conjunction with the immutable and
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* append-only flags (usually). Should be handled differently.
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* Infects ufs, ext2fs, tmpfs, and rump.
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*/
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if (isroot)
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result = KAUTH_RESULT_ALLOW;
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break;
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case KAUTH_SYSTEM_SETIDCORE:
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if (isroot)
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result = KAUTH_RESULT_ALLOW;
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break;
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case KAUTH_SYSTEM_MODULE:
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if (isroot)
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result = KAUTH_RESULT_ALLOW;
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if ((uintptr_t)arg2 != 0) /* autoload */
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result = KAUTH_RESULT_ALLOW;
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break;
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default:
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result = KAUTH_RESULT_DEFER;
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break;
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}
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return (result);
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}
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/*
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* common code for corename, rlimit, and stopflag.
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*/
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static int
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proc_uidmatch(kauth_cred_t cred, kauth_cred_t target)
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{
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int r = 0;
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if (kauth_cred_getuid(cred) != kauth_cred_getuid(target) ||
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kauth_cred_getuid(cred) != kauth_cred_getsvuid(target)) {
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/*
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* suid proc of ours or proc not ours
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*/
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r = EPERM;
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} else if (kauth_cred_getgid(target) != kauth_cred_getsvgid(target)) {
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/*
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* sgid proc has sgid back to us temporarily
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*/
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r = EPERM;
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} else {
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/*
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* our rgid must be in target's group list (ie,
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* sub-processes started by a sgid process)
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*/
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int ismember = 0;
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if (kauth_cred_ismember_gid(cred,
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kauth_cred_getgid(target), &ismember) != 0 ||
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!ismember)
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r = EPERM;
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}
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return (r);
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}
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/*
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* kauth(9) listener
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*
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* Security model: Traditional NetBSD
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* Scope: Process
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* Responsibility: Superuser access
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*/
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int
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secmodel_bsd44_suser_process_cb(kauth_cred_t cred, kauth_action_t action,
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void *cookie, void *arg0, void *arg1, void *arg2, void *arg3)
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{
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struct proc *p;
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bool isroot;
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int result;
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isroot = (kauth_cred_geteuid(cred) == 0);
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result = KAUTH_RESULT_DEFER;
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p = arg0;
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switch (action) {
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case KAUTH_PROCESS_SIGNAL: {
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int signum;
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signum = (int)(unsigned long)arg1;
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if (isroot || kauth_cred_uidmatch(cred, p->p_cred) ||
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(signum == SIGCONT && (curproc->p_session == p->p_session)))
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result = KAUTH_RESULT_ALLOW;
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break;
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}
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case KAUTH_PROCESS_CANSEE: {
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unsigned long req;
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req = (unsigned long)arg1;
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switch (req) {
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case KAUTH_REQ_PROCESS_CANSEE_ARGS:
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case KAUTH_REQ_PROCESS_CANSEE_ENTRY:
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case KAUTH_REQ_PROCESS_CANSEE_OPENFILES:
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if (!secmodel_bsd44_curtain)
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result = KAUTH_RESULT_ALLOW;
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else if (isroot || kauth_cred_uidmatch(cred, p->p_cred))
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result = KAUTH_RESULT_ALLOW;
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break;
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case KAUTH_REQ_PROCESS_CANSEE_ENV:
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if (!isroot &&
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(kauth_cred_getuid(cred) !=
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kauth_cred_getuid(p->p_cred) ||
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kauth_cred_getuid(cred) !=
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kauth_cred_getsvuid(p->p_cred)))
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break;
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else
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result = KAUTH_RESULT_ALLOW;
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break;
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default:
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break;
|
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}
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break;
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}
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case KAUTH_PROCESS_KTRACE: {
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enum kauth_process_req req;
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req = (enum kauth_process_req)(unsigned long)arg1;
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if (isroot) {
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result = KAUTH_RESULT_ALLOW;
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break;
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} else if (req == KAUTH_REQ_PROCESS_KTRACE_PERSISTENT) {
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break;
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}
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if ((p->p_traceflag & KTRFAC_PERSISTENT) ||
|
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(p->p_flag & PK_SUGID)) {
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break;
|
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}
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if (kauth_cred_geteuid(cred) == kauth_cred_getuid(p->p_cred) &&
|
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kauth_cred_getuid(cred) == kauth_cred_getsvuid(p->p_cred) &&
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kauth_cred_getgid(cred) == kauth_cred_getgid(p->p_cred) &&
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kauth_cred_getgid(cred) == kauth_cred_getsvgid(p->p_cred)) {
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result = KAUTH_RESULT_ALLOW;
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break;
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}
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break;
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}
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|
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case KAUTH_PROCESS_PROCFS: {
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enum kauth_process_req req = (enum kauth_process_req)arg2;
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struct pfsnode *pfs = arg1;
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if (isroot) {
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result = KAUTH_RESULT_ALLOW;
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break;
|
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}
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|
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if (req == KAUTH_REQ_PROCESS_PROCFS_CTL) {
|
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break;
|
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}
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|
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switch (pfs->pfs_type) {
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case PFSregs:
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case PFSfpregs:
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case PFSmem:
|
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if (kauth_cred_getuid(cred) !=
|
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kauth_cred_getuid(p->p_cred) ||
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ISSET(p->p_flag, PK_SUGID)) {
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break;
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}
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/*FALLTHROUGH*/
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default:
|
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result = KAUTH_RESULT_ALLOW;
|
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break;
|
|
}
|
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|
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break;
|
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}
|
|
|
|
case KAUTH_PROCESS_PTRACE: {
|
|
switch ((u_long)arg1) {
|
|
case PT_TRACE_ME:
|
|
case PT_ATTACH:
|
|
case PT_WRITE_I:
|
|
case PT_WRITE_D:
|
|
case PT_READ_I:
|
|
case PT_READ_D:
|
|
case PT_IO:
|
|
#ifdef PT_GETREGS
|
|
case PT_GETREGS:
|
|
#endif
|
|
#ifdef PT_SETREGS
|
|
case PT_SETREGS:
|
|
#endif
|
|
#ifdef PT_GETFPREGS
|
|
case PT_GETFPREGS:
|
|
#endif
|
|
#ifdef PT_SETFPREGS
|
|
case PT_SETFPREGS:
|
|
#endif
|
|
#ifdef __HAVE_PTRACE_MACHDEP
|
|
PTRACE_MACHDEP_REQUEST_CASES
|
|
#endif
|
|
if (isroot) {
|
|
result = KAUTH_RESULT_ALLOW;
|
|
break;
|
|
}
|
|
|
|
if (kauth_cred_getuid(cred) !=
|
|
kauth_cred_getuid(p->p_cred) ||
|
|
ISSET(p->p_flag, PK_SUGID)) {
|
|
break;
|
|
}
|
|
|
|
result = KAUTH_RESULT_ALLOW;
|
|
break;
|
|
|
|
#ifdef PT_STEP
|
|
case PT_STEP:
|
|
#endif
|
|
case PT_CONTINUE:
|
|
case PT_KILL:
|
|
case PT_DETACH:
|
|
case PT_LWPINFO:
|
|
case PT_SYSCALL:
|
|
case PT_DUMPCORE:
|
|
result = KAUTH_RESULT_ALLOW;
|
|
break;
|
|
|
|
default:
|
|
result = KAUTH_RESULT_DEFER;
|
|
break;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
case KAUTH_PROCESS_CORENAME:
|
|
if (isroot || proc_uidmatch(cred, p->p_cred) == 0)
|
|
result = KAUTH_RESULT_ALLOW;
|
|
|
|
break;
|
|
|
|
case KAUTH_PROCESS_FORK: {
|
|
int lnprocs = (int)(unsigned long)arg2;
|
|
|
|
/*
|
|
* Don't allow a nonprivileged user to use the last few
|
|
* processes. The variable lnprocs is the current number of
|
|
* processes, maxproc is the limit.
|
|
*/
|
|
if (__predict_false((lnprocs >= maxproc - 5) && !isroot))
|
|
break;
|
|
else
|
|
result = KAUTH_RESULT_ALLOW;
|
|
|
|
break;
|
|
}
|
|
|
|
case KAUTH_PROCESS_KEVENT_FILTER:
|
|
if ((kauth_cred_getuid(p->p_cred) !=
|
|
kauth_cred_getuid(cred) ||
|
|
ISSET(p->p_flag, PK_SUGID)) &&
|
|
!isroot)
|
|
break;
|
|
else
|
|
result = KAUTH_RESULT_ALLOW;
|
|
|
|
break;
|
|
|
|
case KAUTH_PROCESS_NICE:
|
|
if (isroot) {
|
|
result = KAUTH_RESULT_ALLOW;
|
|
break;
|
|
}
|
|
|
|
if (kauth_cred_geteuid(cred) !=
|
|
kauth_cred_geteuid(p->p_cred) &&
|
|
kauth_cred_getuid(cred) !=
|
|
kauth_cred_geteuid(p->p_cred)) {
|
|
break;
|
|
}
|
|
|
|
if ((u_long)arg1 >= p->p_nice)
|
|
result = KAUTH_RESULT_ALLOW;
|
|
|
|
break;
|
|
|
|
case KAUTH_PROCESS_RLIMIT: {
|
|
unsigned long req;
|
|
|
|
req = (unsigned long)arg1;
|
|
|
|
switch (req) {
|
|
case KAUTH_REQ_PROCESS_RLIMIT_SET: {
|
|
struct rlimit *new_rlimit;
|
|
u_long which;
|
|
|
|
if (isroot) {
|
|
result = KAUTH_RESULT_ALLOW;
|
|
break;
|
|
}
|
|
|
|
if ((p != curlwp->l_proc) &&
|
|
(proc_uidmatch(cred, p->p_cred) != 0)) {
|
|
break;
|
|
}
|
|
|
|
new_rlimit = arg2;
|
|
which = (u_long)arg3;
|
|
|
|
if (new_rlimit->rlim_max <=
|
|
p->p_rlimit[which].rlim_max)
|
|
result = KAUTH_RESULT_ALLOW;
|
|
|
|
break;
|
|
}
|
|
|
|
case KAUTH_REQ_PROCESS_RLIMIT_GET:
|
|
result = KAUTH_RESULT_ALLOW;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
case KAUTH_PROCESS_SCHEDULER_GETPARAM:
|
|
if (isroot || kauth_cred_uidmatch(cred, p->p_cred))
|
|
result = KAUTH_RESULT_ALLOW;
|
|
|
|
break;
|
|
|
|
case KAUTH_PROCESS_SCHEDULER_SETPARAM:
|
|
if (isroot)
|
|
result = KAUTH_RESULT_ALLOW;
|
|
else if (kauth_cred_uidmatch(cred, p->p_cred)) {
|
|
struct lwp *l;
|
|
int policy;
|
|
pri_t priority;
|
|
|
|
l = arg1;
|
|
policy = (int)(unsigned long)arg2;
|
|
priority = (pri_t)(unsigned long)arg3;
|
|
|
|
if ((policy == l->l_class ||
|
|
(policy != SCHED_FIFO && policy != SCHED_RR)) &&
|
|
priority <= l->l_priority)
|
|
result = KAUTH_RESULT_ALLOW;
|
|
}
|
|
|
|
break;
|
|
|
|
case KAUTH_PROCESS_SCHEDULER_GETAFFINITY:
|
|
result = KAUTH_RESULT_ALLOW;
|
|
|
|
break;
|
|
|
|
case KAUTH_PROCESS_SCHEDULER_SETAFFINITY:
|
|
if (isroot)
|
|
result = KAUTH_RESULT_ALLOW;
|
|
|
|
break;
|
|
|
|
case KAUTH_PROCESS_SETID:
|
|
if (isroot)
|
|
result = KAUTH_RESULT_ALLOW;
|
|
break;
|
|
|
|
case KAUTH_PROCESS_STOPFLAG:
|
|
if (isroot || proc_uidmatch(cred, p->p_cred) == 0) {
|
|
result = KAUTH_RESULT_ALLOW;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
result = KAUTH_RESULT_DEFER;
|
|
break;
|
|
}
|
|
|
|
return (result);
|
|
}
|
|
|
|
/*
|
|
* kauth(9) listener
|
|
*
|
|
* Security model: Traditional NetBSD
|
|
* Scope: Network
|
|
* Responsibility: Superuser access
|
|
*/
|
|
int
|
|
secmodel_bsd44_suser_network_cb(kauth_cred_t cred, kauth_action_t action,
|
|
void *cookie, void *arg0, void *arg1, void *arg2,
|
|
void *arg3)
|
|
{
|
|
bool isroot;
|
|
int result;
|
|
enum kauth_network_req req;
|
|
|
|
isroot = (kauth_cred_geteuid(cred) == 0);
|
|
result = KAUTH_RESULT_DEFER;
|
|
req = (enum kauth_network_req)arg0;
|
|
|
|
switch (action) {
|
|
case KAUTH_NETWORK_ALTQ:
|
|
switch (req) {
|
|
case KAUTH_REQ_NETWORK_ALTQ_AFMAP:
|
|
case KAUTH_REQ_NETWORK_ALTQ_BLUE:
|
|
case KAUTH_REQ_NETWORK_ALTQ_CBQ:
|
|
case KAUTH_REQ_NETWORK_ALTQ_CDNR:
|
|
case KAUTH_REQ_NETWORK_ALTQ_CONF:
|
|
case KAUTH_REQ_NETWORK_ALTQ_FIFOQ:
|
|
case KAUTH_REQ_NETWORK_ALTQ_HFSC:
|
|
case KAUTH_REQ_NETWORK_ALTQ_JOBS:
|
|
case KAUTH_REQ_NETWORK_ALTQ_PRIQ:
|
|
case KAUTH_REQ_NETWORK_ALTQ_RED:
|
|
case KAUTH_REQ_NETWORK_ALTQ_RIO:
|
|
case KAUTH_REQ_NETWORK_ALTQ_WFQ:
|
|
if (isroot)
|
|
result = KAUTH_RESULT_ALLOW;
|
|
break;
|
|
|
|
default:
|
|
result = KAUTH_RESULT_DEFER;
|
|
break;
|
|
}
|
|
|
|
break;
|
|
|
|
case KAUTH_NETWORK_BIND:
|
|
switch (req) {
|
|
case KAUTH_REQ_NETWORK_BIND_PORT:
|
|
result = KAUTH_RESULT_ALLOW;
|
|
break;
|
|
|
|
case KAUTH_REQ_NETWORK_BIND_PRIVPORT:
|
|
if (isroot)
|
|
result = KAUTH_RESULT_ALLOW;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case KAUTH_NETWORK_FIREWALL:
|
|
switch (req) {
|
|
case KAUTH_REQ_NETWORK_FIREWALL_FW:
|
|
case KAUTH_REQ_NETWORK_FIREWALL_NAT:
|
|
/*
|
|
* Decisions are root-agnostic.
|
|
*
|
|
* Both requests are issued from the context of a
|
|
* device with permission bits acting as access
|
|
* control.
|
|
*/
|
|
result = KAUTH_RESULT_ALLOW;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case KAUTH_NETWORK_FORWSRCRT:
|
|
if (isroot)
|
|
result = KAUTH_RESULT_ALLOW;
|
|
|
|
break;
|
|
|
|
case KAUTH_NETWORK_INTERFACE:
|
|
switch (req) {
|
|
case KAUTH_REQ_NETWORK_INTERFACE_GET:
|
|
case KAUTH_REQ_NETWORK_INTERFACE_SET:
|
|
result = KAUTH_RESULT_ALLOW;
|
|
break;
|
|
|
|
case KAUTH_REQ_NETWORK_INTERFACE_GETPRIV:
|
|
case KAUTH_REQ_NETWORK_INTERFACE_SETPRIV:
|
|
if (isroot)
|
|
result = KAUTH_RESULT_ALLOW;
|
|
break;
|
|
|
|
default:
|
|
result = KAUTH_RESULT_DEFER;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case KAUTH_NETWORK_INTERFACE_PPP:
|
|
switch (req) {
|
|
case KAUTH_REQ_NETWORK_INTERFACE_PPP_ADD:
|
|
if (isroot)
|
|
result = KAUTH_RESULT_ALLOW;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
break;
|
|
|
|
case KAUTH_NETWORK_INTERFACE_SLIP:
|
|
switch (req) {
|
|
case KAUTH_REQ_NETWORK_INTERFACE_SLIP_ADD:
|
|
if (isroot)
|
|
result = KAUTH_RESULT_ALLOW;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
break;
|
|
|
|
case KAUTH_NETWORK_INTERFACE_STRIP:
|
|
switch (req) {
|
|
case KAUTH_REQ_NETWORK_INTERFACE_STRIP_ADD:
|
|
if (isroot)
|
|
result = KAUTH_RESULT_ALLOW;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
break;
|
|
|
|
case KAUTH_NETWORK_INTERFACE_TUN:
|
|
switch (req) {
|
|
case KAUTH_REQ_NETWORK_INTERFACE_TUN_ADD:
|
|
if (isroot)
|
|
result = KAUTH_RESULT_ALLOW;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
break;
|
|
|
|
case KAUTH_NETWORK_NFS:
|
|
switch (req) {
|
|
case KAUTH_REQ_NETWORK_NFS_EXPORT:
|
|
case KAUTH_REQ_NETWORK_NFS_SVC:
|
|
if (isroot)
|
|
result = KAUTH_RESULT_ALLOW;
|
|
|
|
break;
|
|
|
|
default:
|
|
result = KAUTH_RESULT_DEFER;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case KAUTH_NETWORK_ROUTE:
|
|
switch (((struct rt_msghdr *)arg1)->rtm_type) {
|
|
case RTM_GET:
|
|
result = KAUTH_RESULT_ALLOW;
|
|
break;
|
|
|
|
default:
|
|
if (isroot)
|
|
result = KAUTH_RESULT_ALLOW;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case KAUTH_NETWORK_SOCKET:
|
|
switch (req) {
|
|
case KAUTH_REQ_NETWORK_SOCKET_DROP:
|
|
/*
|
|
* The superuser can drop any connection. Normal users
|
|
* can only drop their own connections.
|
|
*/
|
|
if (isroot)
|
|
result = KAUTH_RESULT_ALLOW;
|
|
else {
|
|
struct socket *so = (struct socket *)arg1;
|
|
uid_t sockuid = so->so_uidinfo->ui_uid;
|
|
|
|
if (sockuid == kauth_cred_getuid(cred) ||
|
|
sockuid == kauth_cred_geteuid(cred))
|
|
result = KAUTH_RESULT_ALLOW;
|
|
}
|
|
|
|
|
|
break;
|
|
|
|
case KAUTH_REQ_NETWORK_SOCKET_OPEN:
|
|
if ((u_long)arg1 == PF_ROUTE || (u_long)arg1 == PF_BLUETOOTH)
|
|
result = KAUTH_RESULT_ALLOW;
|
|
else if ((u_long)arg2 == SOCK_RAW) {
|
|
if (isroot)
|
|
result = KAUTH_RESULT_ALLOW;
|
|
} else
|
|
result = KAUTH_RESULT_ALLOW;
|
|
break;
|
|
|
|
case KAUTH_REQ_NETWORK_SOCKET_RAWSOCK:
|
|
if (isroot)
|
|
result = KAUTH_RESULT_ALLOW;
|
|
break;
|
|
|
|
case KAUTH_REQ_NETWORK_SOCKET_CANSEE:
|
|
if (secmodel_bsd44_curtain) {
|
|
uid_t so_uid;
|
|
|
|
so_uid =
|
|
((struct socket *)arg1)->so_uidinfo->ui_uid;
|
|
if (isroot ||
|
|
kauth_cred_geteuid(cred) == so_uid)
|
|
result = KAUTH_RESULT_ALLOW;
|
|
} else
|
|
result = KAUTH_RESULT_ALLOW;
|
|
break;
|
|
|
|
case KAUTH_REQ_NETWORK_SOCKET_SETPRIV:
|
|
if (isroot)
|
|
result = KAUTH_RESULT_ALLOW;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
break;
|
|
|
|
|
|
default:
|
|
result = KAUTH_RESULT_DEFER;
|
|
break;
|
|
}
|
|
|
|
return (result);
|
|
}
|
|
|
|
/*
|
|
* kauth(9) listener
|
|
*
|
|
* Security model: Traditional NetBSD
|
|
* Scope: Machdep
|
|
* Responsibility: Superuser access
|
|
*/
|
|
int
|
|
secmodel_bsd44_suser_machdep_cb(kauth_cred_t cred, kauth_action_t action,
|
|
void *cookie, void *arg0, void *arg1, void *arg2,
|
|
void *arg3)
|
|
{
|
|
bool isroot;
|
|
int result;
|
|
|
|
isroot = (kauth_cred_geteuid(cred) == 0);
|
|
result = KAUTH_RESULT_DEFER;
|
|
|
|
switch (action) {
|
|
case KAUTH_MACHDEP_IOPERM_GET:
|
|
case KAUTH_MACHDEP_LDT_GET:
|
|
case KAUTH_MACHDEP_LDT_SET:
|
|
case KAUTH_MACHDEP_MTRR_GET:
|
|
result = KAUTH_RESULT_ALLOW;
|
|
break;
|
|
|
|
case KAUTH_MACHDEP_CACHEFLUSH:
|
|
case KAUTH_MACHDEP_IOPERM_SET:
|
|
case KAUTH_MACHDEP_IOPL:
|
|
case KAUTH_MACHDEP_MTRR_SET:
|
|
case KAUTH_MACHDEP_NVRAM:
|
|
case KAUTH_MACHDEP_UNMANAGEDMEM:
|
|
if (isroot)
|
|
result = KAUTH_RESULT_ALLOW;
|
|
break;
|
|
|
|
default:
|
|
result = KAUTH_RESULT_DEFER;
|
|
break;
|
|
}
|
|
|
|
return (result);
|
|
}
|
|
|
|
/*
|
|
* kauth(9) listener
|
|
*
|
|
* Security model: Traditional NetBSD
|
|
* Scope: Device
|
|
* Responsibility: Superuser access
|
|
*/
|
|
int
|
|
secmodel_bsd44_suser_device_cb(kauth_cred_t cred, kauth_action_t action,
|
|
void *cookie, void *arg0, void *arg1, void *arg2,
|
|
void *arg3)
|
|
{
|
|
struct tty *tty;
|
|
bool isroot;
|
|
int result;
|
|
|
|
isroot = (kauth_cred_geteuid(cred) == 0);
|
|
result = KAUTH_RESULT_DEFER;
|
|
|
|
switch (action) {
|
|
case KAUTH_DEVICE_BLUETOOTH_SETPRIV:
|
|
if (isroot)
|
|
result = KAUTH_RESULT_ALLOW;
|
|
break;
|
|
|
|
case KAUTH_DEVICE_BLUETOOTH_BCSP:
|
|
case KAUTH_DEVICE_BLUETOOTH_BTUART: {
|
|
enum kauth_device_req req;
|
|
|
|
req = (enum kauth_device_req)arg0;
|
|
switch (req) {
|
|
case KAUTH_REQ_DEVICE_BLUETOOTH_BCSP_ADD:
|
|
case KAUTH_REQ_DEVICE_BLUETOOTH_BTUART_ADD:
|
|
if (isroot)
|
|
result = KAUTH_RESULT_ALLOW;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
case KAUTH_DEVICE_RAWIO_SPEC:
|
|
case KAUTH_DEVICE_RAWIO_PASSTHRU:
|
|
/*
|
|
* Decision is root-agnostic.
|
|
*
|
|
* Both requests can be issued on devices subject to their
|
|
* permission bits.
|
|
*/
|
|
result = KAUTH_RESULT_ALLOW;
|
|
break;
|
|
|
|
case KAUTH_DEVICE_TTY_OPEN:
|
|
tty = arg0;
|
|
|
|
if (!(tty->t_state & TS_ISOPEN))
|
|
result = KAUTH_RESULT_ALLOW;
|
|
else if (tty->t_state & TS_XCLUDE) {
|
|
if (isroot)
|
|
result = KAUTH_RESULT_ALLOW;
|
|
} else
|
|
result = KAUTH_RESULT_ALLOW;
|
|
|
|
break;
|
|
|
|
case KAUTH_DEVICE_TTY_PRIVSET:
|
|
if (isroot)
|
|
result = KAUTH_RESULT_ALLOW;
|
|
|
|
break;
|
|
|
|
case KAUTH_DEVICE_TTY_STI:
|
|
if (isroot)
|
|
result = KAUTH_RESULT_ALLOW;
|
|
|
|
break;
|
|
|
|
case KAUTH_DEVICE_RND_ADDDATA:
|
|
case KAUTH_DEVICE_RND_GETPRIV:
|
|
case KAUTH_DEVICE_RND_SETPRIV:
|
|
if (isroot)
|
|
result = KAUTH_RESULT_ALLOW;
|
|
break;
|
|
|
|
default:
|
|
result = KAUTH_RESULT_DEFER;
|
|
break;
|
|
}
|
|
|
|
return (result);
|
|
}
|