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
93 lines
2.5 KiB
C
93 lines
2.5 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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* Confirm that calls to fhopen() require privilege, trying with, and
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* without. We create a temporary file and grab the file handle using
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* getfh() before starting.
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*/
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#include <sys/param.h>
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#include <sys/mount.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include "main.h"
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void
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priv_vfs_fhopen(void)
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{
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char fpath[1024];
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fhandle_t fh;
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int fd;
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assert_root();
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setup_file(fpath, UID_ROOT, GID_WHEEL, 0644);
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if (getfh(fpath, &fh) < 0) {
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warn("getfh(%s)", fpath);
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goto out;
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}
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/*
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* First, try with privilege.
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*/
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fd = fhopen(&fh, O_RDONLY);
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if (fd < 0) {
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warn("fhopen(%s) as root", fpath);
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goto out;
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}
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close(fd);
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/*
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* Now, without privilege.
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*/
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set_euid(UID_OTHER);
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fd = fhopen(&fh, O_RDONLY);
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if (fd >= 0) {
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warnx("fhopen(%s) succeeded as !root", fpath);
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close(fd);
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goto out;
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}
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if (errno != EPERM) {
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warn("fhopen(%s) wrong errno %d as !root", fpath, 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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