9fa5f6b4b9
implemented properly for a number of kernel subsystems. In general, they try to exercise the privilege first as the root user, then as a test user, in order to determine when privilege is being checked. Currently, these tests do not compare inside/outside jail, and probably should be enhanced to do that. Sponsored by: nCircle Network Security, Inc. Obtained from: TrustedBSD Project
97 lines
2.8 KiB
C
97 lines
2.8 KiB
C
/*-
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* Copyright (c) 2006 nCircle Network Security, Inc.
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* All rights reserved.
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*
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* This software was developed by Robert N. M. Watson for the TrustedBSD
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* Project under contract to nCircle Network Security, Inc.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR, NCIRCLE NETWORK SECURITY,
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* INC., OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* Test that privilege is required to write to the system extended attribute
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* namespace.
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*/
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#include <sys/types.h>
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#include <sys/extattr.h>
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#include <err.h>
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#include <errno.h>
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#include <string.h>
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#include <unistd.h>
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#include "main.h"
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#define EA_NAMESPACE EXTATTR_NAMESPACE_SYSTEM
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#define EA_NAME "test"
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#define EA_DATA "test"
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#define EA_SIZE strlen(EA_DATA)
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void
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priv_vfs_extattr_system(void)
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{
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char fpath[1024];
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int error;
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assert_root();
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/*
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* Set file perms so that discretionary access control would grant
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* write rights on non-system EAs on the file.
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*/
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setup_file(fpath, UID_ROOT, GID_WHEEL, 0666);
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/*
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* Try with privilege.
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*/
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if (extattr_set_file(fpath, EA_NAMESPACE, EA_NAME, EA_DATA, EA_SIZE)
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< 0) {
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warn("extattr_set_file(SYSTEM, %s, %s, %d) as root",
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EA_NAME, EA_DATA, EA_SIZE);
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goto out;
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}
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set_euid(UID_OTHER);
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/*
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* Try without privilege.
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*/
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error = extattr_set_file(fpath, EA_NAMESPACE, EA_NAME, EA_DATA,
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EA_SIZE);
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if (error == 0) {
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warn("extattr_set_file(SYSTEM, %s, %s, %d) succeeded as !root",
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EA_NAME, EA_DATA, EA_SIZE);
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goto out;
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}
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if (errno != EPERM) {
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warn("extattr_set_file(SYSTEM, %s, %s, %d) wrong errno %d "
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"as !root", EA_NAME, EA_DATA, EA_SIZE, errno);
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goto out;
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}
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out:
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seteuid(UID_ROOT);
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(void)unlink(fpath);
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}
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