d903306a26
work present in FreeBSD 7.0 to refine the kernel privilege model: - Introduce support for jail as a testing variable, in order to confirm that privileges are properly restricted in the jail environment. - Restructure overall testing approach so that privilege and jail conditions are set in the testing infrastructure before tests are invoked, and done so in a custom-created process to isolate the impact of tests from each other in a more consistent way. - Tests now provide setup and cleanup hooks that occur before and after the test runs. - New privilege tests are now present for several audit privileges, several credential management privileges, dmesg buffer reading privilege, and netinet raw socket creation. - Other existing tests are restructured and generally improved as a result of better framework structure and jail as a variable. For exampe, we now test that certain sysctls are writable only outside jail, while others are writable within jail. On a similar note, privileges relating to setting UFS file flags are now better exercised, as with the right to chmod and utimes files. Approved by: re (bmah) Obtained from: TrustedBSD Project
209 lines
6.2 KiB
C
209 lines
6.2 KiB
C
/*-
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* Copyright (c) 2007 Robert M. M. Watson
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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.
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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 various UID/GID/etc-related system calls require root
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* privilege in the absense of any saved/real/etc variations in the
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* credential. It would be nice to also check cases where those bits of the
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* credential are more interesting.
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*
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* XXXRW: Add support for testing more diverse real/saved scenarios.
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*/
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#include <sys/types.h>
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#include <err.h>
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#include <errno.h>
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#include <stdio.h>
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#include <unistd.h>
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#include "main.h"
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int
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priv_cred_setup(int asroot, int injail, struct test *test)
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{
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return (0);
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}
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void
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priv_cred_setuid(int asroot, int injail, struct test *test)
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{
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int error;
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error = setuid(UID_OTHER);
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if (asroot && injail)
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expect("priv_setuid(asroot, injail)", error, 0, 0);
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if (asroot && !injail)
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expect("priv_setuid(asroot, !injail)", error, 0, 0);
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if (!asroot && injail)
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expect("priv_setuid(!asroot, injail)", error, -1, EPERM);
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if (!asroot && !injail)
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expect("priv_setuid(!asroot, !injail)", error, -1, EPERM);
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}
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void
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priv_cred_seteuid(int asroot, int injail, struct test *test)
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{
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int error;
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error = seteuid(UID_OTHER);
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if (asroot && injail)
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expect("priv_seteuid(asroot, injail)", error, 0, 0);
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if (asroot && !injail)
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expect("priv_seteuid(asroot, !injail)", error, 0, 0);
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if (!asroot && injail)
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expect("priv_seteuid(!asroot, injail)", error, -1, EPERM);
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if (!asroot && !injail)
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expect("priv_seteuid(!asroot, !injail)", error, -1, EPERM);
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}
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void
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priv_cred_setgid(int asroot, int injail, struct test *test)
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{
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int error;
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error = setgid(GID_OTHER);
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if (asroot && injail)
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expect("priv_setgid(asroot, injail)", error, 0, 0);
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if (asroot && !injail)
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expect("priv_setgid(asroot, !injail)", error, 0, 0);
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if (!asroot && injail)
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expect("priv_setgid(!asroot, injail)", error, -1, EPERM);
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if (!asroot && !injail)
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expect("priv_setgid(!asroot, !injail)", error, -1, EPERM);
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}
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void
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priv_cred_setegid(int asroot, int injail, struct test *test)
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{
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int error;
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error = setegid(GID_OTHER);
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if (asroot && injail)
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expect("priv_setegid(asroot, injail)", error, 0, 0);
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if (asroot && !injail)
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expect("priv_setegid(asroot, !injail)", error, 0, 0);
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if (!asroot && injail)
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expect("priv_setegd(!asroot, injail)", error, -1, EPERM);
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if (!asroot && !injail)
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expect("priv_setegid(!asroot, !injail)", error, -1, EPERM);
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}
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static const gid_t gidset[] = {GID_WHEEL, GID_OTHER};
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static const int gidset_len = sizeof(gidset) / sizeof(gid_t);
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void
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priv_cred_setgroups(int asroot, int injail, struct test *test)
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{
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int error;
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error = setgroups(gidset_len, gidset);
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if (asroot && injail)
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expect("priv_setgroups(asroot, injail)", error, 0, 0);
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if (asroot && !injail)
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expect("priv_setgroups(asroot, !injail)", error, 0, 0);
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if (!asroot && injail)
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expect("priv_setgroups(!asroot, injail)", error, -1, EPERM);
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if (!asroot && !injail)
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expect("priv_setgroups(!asroot, !injail)", error, -1, EPERM);
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}
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void
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priv_cred_setreuid(int asroot, int injail, struct test *test)
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{
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int error;
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error = setreuid(UID_OTHER, UID_OTHER);
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if (asroot && injail)
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expect("priv_setreuid(asroot, injail)", error, 0, 0);
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if (asroot && !injail)
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expect("priv_setreuid(asroot, !injail)", error, 0, 0);
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if (!asroot && injail)
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expect("priv_setreuid(!asroot, injail)", error, -1, EPERM);
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if (!asroot && !injail)
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expect("priv_setreuid(!asroot, !injail)", error, -1, EPERM);
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}
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void
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priv_cred_setregid(int asroot, int injail, struct test *test)
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{
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int error;
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error = setregid(GID_OTHER, GID_OTHER);
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if (asroot && injail)
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expect("priv_setregid(asroot, injail)", error, 0, 0);
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if (asroot && !injail)
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expect("priv_setregid(asroot, !injail)", error, 0, 0);
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if (!asroot && injail)
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expect("priv_setregid(!asroot, injail)", error, -1, EPERM);
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if (!asroot && !injail)
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expect("priv_setregid(!asroot, !injail)", error, -1, EPERM);
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}
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void
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priv_cred_setresuid(int asroot, int injail, struct test *test)
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{
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int error;
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error = setresuid(UID_OTHER, UID_OTHER, UID_OTHER);
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if (asroot && injail)
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expect("priv_setresuid(asroot, injail)", error, 0, 0);
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if (asroot && !injail)
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expect("priv_setresuid(asroot, !injail)", error, 0, 0);
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if (!asroot && injail)
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expect("priv_setresuid(!asroot, injail)", error, -1, EPERM);
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if (!asroot && !injail)
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expect("priv_setresuid(!asroot, !injail)", error, -1, EPERM);
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}
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void
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priv_cred_setresgid(int asroot, int injail, struct test *test)
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{
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int error;
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error = setresgid(GID_OTHER, GID_OTHER, GID_OTHER);
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if (asroot && injail)
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expect("priv_setresgid(asroot, injail)", error, 0, 0);
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if (asroot && !injail)
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expect("priv_setresgid(asroot, !injail)", error, 0, 0);
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if (!asroot && injail)
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expect("priv_setresgid(!asroot, injail)", error, -1, EPERM);
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if (!asroot && !injail)
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expect("priv_setresgid(!asroot, !injail)", error, -1, EPERM);
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}
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void
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priv_cred_cleanup(int asroot, int injail, struct test *test)
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{
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}
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