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
330 lines
9.3 KiB
C
330 lines
9.3 KiB
C
/*-
|
|
* Copyright (c) 2006 nCircle Network Security, Inc.
|
|
* Copyright (c) 2007 Robert N. M. Watson
|
|
* All rights reserved.
|
|
*
|
|
* This software was developed by Robert N. M. Watson for the TrustedBSD
|
|
* Project under contract to nCircle Network Security, Inc.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR, NCIRCLE NETWORK SECURITY,
|
|
* INC., OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
|
|
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
|
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
|
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
|
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
/*
|
|
* Test privilege associated with real time process settings. There are
|
|
* three relevant notions of privilege:
|
|
*
|
|
* - Privilege to set the real-time priority of the current process.
|
|
* - Privilege to set the real-time priority of another process.
|
|
* - Privilege to set the idle priority of another process.
|
|
* - No privilege to set the idle priority of the current process.
|
|
*
|
|
* This requires a test process and a target (dummy) process running with
|
|
* various uids. This test is based on the code in the setpriority() test.
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/rtprio.h>
|
|
#include <sys/wait.h>
|
|
|
|
#include <err.h>
|
|
#include <errno.h>
|
|
#include <signal.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
#include "main.h"
|
|
|
|
static int childproc_running;
|
|
static pid_t childproc;
|
|
|
|
int
|
|
priv_sched_rtprio_setup(int asroot, int injail, struct test *test)
|
|
{
|
|
int another_uid, need_child;
|
|
|
|
/*
|
|
* Some tests require a second process with specific credentials.
|
|
* Set that up here, and kill in cleanup.
|
|
*/
|
|
need_child = 0;
|
|
if (test->t_test_func == priv_sched_rtprio_aproc_normal ||
|
|
test->t_test_func == priv_sched_rtprio_aproc_idle ||
|
|
test->t_test_func == priv_sched_rtprio_aproc_realtime) {
|
|
need_child = 1;
|
|
another_uid = 1;
|
|
}
|
|
if (test->t_test_func == priv_sched_rtprio_myproc_normal ||
|
|
test->t_test_func == priv_sched_rtprio_myproc_idle ||
|
|
test->t_test_func == priv_sched_rtprio_myproc_realtime) {
|
|
need_child = 1;
|
|
}
|
|
|
|
if (need_child) {
|
|
childproc = fork();
|
|
if (childproc < 0) {
|
|
warn("priv_sched_setup: fork");
|
|
return (-1);
|
|
}
|
|
if (childproc == 0) {
|
|
if (another_uid) {
|
|
if (setresuid(UID_THIRD, UID_THIRD,
|
|
UID_THIRD) < 0)
|
|
err(-1, "setresuid(%d)", UID_THIRD);
|
|
}
|
|
while (1)
|
|
sleep(1);
|
|
}
|
|
childproc_running = 1;
|
|
sleep(1); /* Allow dummy thread to change uids. */
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
priv_sched_rtprio_curproc_normal(int asroot, int injail, struct test *test)
|
|
{
|
|
struct rtprio rtp;
|
|
int error;
|
|
|
|
rtp.type = RTP_PRIO_NORMAL;
|
|
rtp.prio = 0;
|
|
error = rtprio(RTP_SET, 0, &rtp);
|
|
if (asroot && injail)
|
|
expect("priv_sched_rtprio_curproc_normal(asroot, injail)",
|
|
error, 0, 0);
|
|
if (asroot && !injail)
|
|
expect("priv_sched_rtprio_curproc_normal(asroot, !injail)",
|
|
error, 0, 0);
|
|
if (!asroot && injail)
|
|
expect("priv_sched_rtprio_curproc_normal(!asroot, injail)",
|
|
error, 0, 0);
|
|
if (!asroot && !injail)
|
|
expect("priv_sched_rtprio_curproc_normal(!asroot, !injail)",
|
|
error, 0, 0);
|
|
}
|
|
|
|
void
|
|
priv_sched_rtprio_curproc_idle(int asroot, int injail, struct test *test)
|
|
{
|
|
struct rtprio rtp;
|
|
int error;
|
|
|
|
rtp.type = RTP_PRIO_IDLE;
|
|
rtp.prio = 0;
|
|
error = rtprio(RTP_SET, 0, &rtp);
|
|
if (asroot && injail)
|
|
expect("priv_sched_rtprio_curproc_idle(asroot, injail)",
|
|
error, -1, EPERM);
|
|
if (asroot && !injail)
|
|
expect("priv_sched_rtprio_curproc_idle(asroot, !injail)",
|
|
error, 0, 0);
|
|
if (!asroot && injail)
|
|
expect("priv_sched_rtprio_curproc_idle(!asroot, injail)",
|
|
error, -1, EPERM);
|
|
if (!asroot && !injail)
|
|
expect("priv_sched_rtprio_curproc_idle(!asroot, !injail)",
|
|
error, -1, EPERM);
|
|
}
|
|
|
|
void
|
|
priv_sched_rtprio_curproc_realtime(int asroot, int injail, struct test *test)
|
|
{
|
|
struct rtprio rtp;
|
|
int error;
|
|
|
|
rtp.type = RTP_PRIO_REALTIME;
|
|
rtp.prio = 0;
|
|
error = rtprio(RTP_SET, 0, &rtp);
|
|
if (asroot && injail)
|
|
expect("priv_sched_rtprio_curproc_realtime(asroot, injail)",
|
|
error, -1, EPERM);
|
|
if (asroot && !injail)
|
|
expect("priv_sched_rtprio_curproc_realtime(asroot, !injail)",
|
|
error, 0, 0);
|
|
if (!asroot && injail)
|
|
expect("priv_sched_rtprio_curproc_realtime(!asroot, injail)",
|
|
error, -1, EPERM);
|
|
if (!asroot && !injail)
|
|
expect("priv_sched_rtprio_curproc_realtime(!asroot, !injail)",
|
|
error, -1, EPERM);
|
|
}
|
|
|
|
void
|
|
priv_sched_rtprio_myproc_normal(int asroot, int injail, struct test *test)
|
|
{
|
|
struct rtprio rtp;
|
|
int error;
|
|
|
|
rtp.type = RTP_PRIO_NORMAL;
|
|
rtp.prio = 0;
|
|
error = rtprio(RTP_SET, 0, &rtp);
|
|
if (asroot && injail)
|
|
expect("priv_sched_rtprio_myproc_normal(asroot, injail)",
|
|
error, 0, 0);
|
|
if (asroot && !injail)
|
|
expect("priv_sched_rtprio_myproc_normal(asroot, !injail)",
|
|
error, 0, 0);
|
|
if (!asroot && injail)
|
|
expect("priv_sched_rtprio_myproc_normal(!asroot, injail)",
|
|
error, 0, 0);
|
|
if (!asroot && !injail)
|
|
expect("priv_sched_rtprio_myproc_normal(!asroot, !injail)",
|
|
error, 0, 0);
|
|
}
|
|
|
|
void
|
|
priv_sched_rtprio_myproc_idle(int asroot, int injail, struct test *test)
|
|
{
|
|
struct rtprio rtp;
|
|
int error;
|
|
|
|
rtp.type = RTP_PRIO_IDLE;
|
|
rtp.prio = 0;
|
|
error = rtprio(RTP_SET, 0, &rtp);
|
|
if (asroot && injail)
|
|
expect("priv_sched_rtprio_myproc_idle(asroot, injail)",
|
|
error, -1, EPERM);
|
|
if (asroot && !injail)
|
|
expect("priv_sched_rtprio_myproc_idle(asroot, !injail)",
|
|
error, 0, 0);
|
|
if (!asroot && injail)
|
|
expect("priv_sched_rtprio_myproc_idle(!asroot, injail)",
|
|
error, -1, EPERM);
|
|
if (!asroot && !injail)
|
|
expect("priv_sched_rtprio_myproc_idle(!asroot, !injail)",
|
|
error, -1, EPERM);
|
|
}
|
|
|
|
void
|
|
priv_sched_rtprio_myproc_realtime(int asroot, int injail, struct test *test)
|
|
{
|
|
struct rtprio rtp;
|
|
int error;
|
|
|
|
rtp.type = RTP_PRIO_REALTIME;
|
|
rtp.prio = 0;
|
|
error = rtprio(RTP_SET, 0, &rtp);
|
|
if (asroot && injail)
|
|
expect("priv_sched_rtprio_myproc_realtime(asroot, injail)",
|
|
error, -1, EPERM);
|
|
if (asroot && !injail)
|
|
expect("priv_sched_rtprio_myproc_realtime(asroot, !injail)",
|
|
error, 0, 0);
|
|
if (!asroot && injail)
|
|
expect("priv_sched_rtprio_myproc_realtime(!asroot, injail)",
|
|
error, -1, EPERM);
|
|
if (!asroot && !injail)
|
|
expect("priv_sched_rtprio_myproc_realtime(!asroot, !injail)",
|
|
error, -1, EPERM);
|
|
}
|
|
|
|
void
|
|
priv_sched_rtprio_aproc_normal(int asroot, int injail, struct test *test)
|
|
{
|
|
struct rtprio rtp;
|
|
int error;
|
|
|
|
rtp.type = RTP_PRIO_NORMAL;
|
|
rtp.prio = 0;
|
|
error = rtprio(RTP_SET, childproc, &rtp);
|
|
if (asroot && injail)
|
|
expect("priv_sched_rtprio_aproc_normal(asroot, injail)",
|
|
error, -1, ESRCH);
|
|
if (asroot && !injail)
|
|
expect("priv_sched_rtprio_aproc_normal(asroot, !injail)",
|
|
error, 0, 0);
|
|
if (!asroot && injail)
|
|
expect("priv_sched_rtprio_aproc_normal(!asroot, injail)",
|
|
error, -1, ESRCH);
|
|
if (!asroot && !injail)
|
|
expect("priv_sched_rtprio_aproc_normal(!asroot, !injail)",
|
|
error, -1, EPERM);
|
|
}
|
|
|
|
void
|
|
priv_sched_rtprio_aproc_idle(int asroot, int injail, struct test *test)
|
|
{
|
|
struct rtprio rtp;
|
|
int error;
|
|
|
|
rtp.type = RTP_PRIO_IDLE;
|
|
rtp.prio = 0;
|
|
error = rtprio(RTP_SET, childproc, &rtp);
|
|
if (asroot && injail)
|
|
expect("priv_sched_rtprio_aproc_idle(asroot, injail)",
|
|
error, -1, ESRCH);
|
|
if (asroot && !injail)
|
|
expect("priv_sched_rtprio_aproc_idle(asroot, !injail)",
|
|
error, 0, 0);
|
|
if (!asroot && injail)
|
|
expect("priv_sched_rtprio_aproc_idle(!asroot, injail)",
|
|
error, -1, ESRCH);
|
|
if (!asroot && !injail)
|
|
expect("priv_sched_rtprio_aroc_idle(!asroot, !injail)",
|
|
error, -1, EPERM);
|
|
}
|
|
|
|
void
|
|
priv_sched_rtprio_aproc_realtime(int asroot, int injail, struct test *test)
|
|
{
|
|
struct rtprio rtp;
|
|
int error;
|
|
|
|
rtp.type = RTP_PRIO_REALTIME;
|
|
rtp.prio = 0;
|
|
error = rtprio(RTP_SET, childproc, &rtp);
|
|
if (asroot && injail)
|
|
expect("priv_sched_rtprio_aproc_realtime(asroot, injail)",
|
|
error, -1, ESRCH);
|
|
if (asroot && !injail)
|
|
expect("priv_sched_rtprio_aproc_realtime(asroot, !injail)",
|
|
error, 0, 0);
|
|
if (!asroot && injail)
|
|
expect("priv_sched_rtprio_aproc_realtime(!asroot, injail)",
|
|
error, -1, ESRCH);
|
|
if (!asroot && !injail)
|
|
expect("priv_sched_rtprio_aproc_realtime(!asroot, !injail)",
|
|
error, -1, EPERM);
|
|
}
|
|
|
|
void
|
|
priv_sched_rtprio_cleanup(int asroot, int injail, struct test *test)
|
|
{
|
|
pid_t pid;
|
|
|
|
if (childproc_running) {
|
|
(void)kill(childproc, SIGKILL);
|
|
while (1) {
|
|
pid = waitpid(childproc, NULL, 0);
|
|
if (pid == -1)
|
|
warn("waitpid(%d (test), NULL, 0)",
|
|
childproc);
|
|
if (pid == childproc)
|
|
break;
|
|
}
|
|
childproc_running = 0;
|
|
childproc = -1;
|
|
}
|
|
}
|