This adds the 'nonewprivs' mode, corresponding to newly added procctl(2) commands PROC_NO_NEW_PRIVS_CTL and PROC_NO_NEW_PRIVS_STATUS. Reviewed By: kib Sponsored By: EPSRC Differential Revision: https://reviews.freebsd.org/D30940
386 lines
9.1 KiB
C
386 lines
9.1 KiB
C
/*-
|
|
* Copyright (c) 2016 The FreeBSD Foundation
|
|
* All rights reserved.
|
|
*
|
|
* This software was developed by Konstantin Belousov <kib@FreeBSD.org>
|
|
* under sponsorship from the FreeBSD Foundation.
|
|
*
|
|
* 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 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/procctl.h>
|
|
#include <err.h>
|
|
#include <stdbool.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
enum {
|
|
MODE_ASLR,
|
|
MODE_INVALID,
|
|
MODE_TRACE,
|
|
MODE_TRAPCAP,
|
|
MODE_PROTMAX,
|
|
MODE_STACKGAP,
|
|
MODE_NO_NEW_PRIVS,
|
|
#ifdef PROC_KPTI_CTL
|
|
MODE_KPTI,
|
|
#endif
|
|
#ifdef PROC_LA_CTL
|
|
MODE_LA57,
|
|
MODE_LA48,
|
|
#endif
|
|
};
|
|
|
|
static pid_t
|
|
str2pid(const char *str)
|
|
{
|
|
pid_t res;
|
|
char *tail;
|
|
|
|
res = strtol(str, &tail, 0);
|
|
if (*tail != '\0') {
|
|
warnx("non-numeric pid");
|
|
return (-1);
|
|
}
|
|
return (res);
|
|
}
|
|
|
|
#ifdef PROC_KPTI_CTL
|
|
#define KPTI_USAGE "|kpti"
|
|
#else
|
|
#define KPTI_USAGE
|
|
#endif
|
|
#ifdef PROC_LA_CTL
|
|
#define LA_USAGE "|la48|la57"
|
|
#else
|
|
#define LA_USAGE
|
|
#endif
|
|
|
|
static void __dead2
|
|
usage(void)
|
|
{
|
|
|
|
fprintf(stderr, "Usage: proccontrol -m (aslr|protmax|trace|trapcap|"
|
|
"stackgap|nonewprivs"KPTI_USAGE LA_USAGE") [-q] "
|
|
"[-s (enable|disable)] [-p pid | command]\n");
|
|
exit(1);
|
|
}
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
int arg, ch, error, mode;
|
|
pid_t pid;
|
|
bool enable, do_command, query;
|
|
|
|
mode = MODE_INVALID;
|
|
enable = true;
|
|
pid = -1;
|
|
query = false;
|
|
while ((ch = getopt(argc, argv, "m:qs:p:")) != -1) {
|
|
switch (ch) {
|
|
case 'm':
|
|
if (strcmp(optarg, "aslr") == 0)
|
|
mode = MODE_ASLR;
|
|
else if (strcmp(optarg, "protmax") == 0)
|
|
mode = MODE_PROTMAX;
|
|
else if (strcmp(optarg, "trace") == 0)
|
|
mode = MODE_TRACE;
|
|
else if (strcmp(optarg, "trapcap") == 0)
|
|
mode = MODE_TRAPCAP;
|
|
else if (strcmp(optarg, "stackgap") == 0)
|
|
mode = MODE_STACKGAP;
|
|
else if (strcmp(optarg, "nonewprivs") == 0)
|
|
mode = MODE_NO_NEW_PRIVS;
|
|
#ifdef PROC_KPTI_CTL
|
|
else if (strcmp(optarg, "kpti") == 0)
|
|
mode = MODE_KPTI;
|
|
#endif
|
|
#ifdef PROC_LA_CTL
|
|
else if (strcmp(optarg, "la57") == 0)
|
|
mode = MODE_LA57;
|
|
else if (strcmp(optarg, "la48") == 0)
|
|
mode = MODE_LA48;
|
|
#endif
|
|
else
|
|
usage();
|
|
break;
|
|
case 's':
|
|
if (strcmp(optarg, "enable") == 0)
|
|
enable = true;
|
|
else if (strcmp(optarg, "disable") == 0)
|
|
enable = false;
|
|
else
|
|
usage();
|
|
break;
|
|
case 'p':
|
|
pid = str2pid(optarg);
|
|
break;
|
|
case 'q':
|
|
query = true;
|
|
break;
|
|
case '?':
|
|
default:
|
|
usage();
|
|
break;
|
|
}
|
|
}
|
|
argc -= optind;
|
|
argv += optind;
|
|
do_command = argc != 0;
|
|
if (do_command) {
|
|
if (pid != -1 || query)
|
|
usage();
|
|
pid = getpid();
|
|
} else if (pid == -1) {
|
|
pid = getpid();
|
|
}
|
|
|
|
if (query) {
|
|
switch (mode) {
|
|
case MODE_ASLR:
|
|
error = procctl(P_PID, pid, PROC_ASLR_STATUS, &arg);
|
|
break;
|
|
case MODE_TRACE:
|
|
error = procctl(P_PID, pid, PROC_TRACE_STATUS, &arg);
|
|
break;
|
|
case MODE_TRAPCAP:
|
|
error = procctl(P_PID, pid, PROC_TRAPCAP_STATUS, &arg);
|
|
break;
|
|
case MODE_PROTMAX:
|
|
error = procctl(P_PID, pid, PROC_PROTMAX_STATUS, &arg);
|
|
break;
|
|
case MODE_STACKGAP:
|
|
error = procctl(P_PID, pid, PROC_STACKGAP_STATUS, &arg);
|
|
break;
|
|
case MODE_NO_NEW_PRIVS:
|
|
error = procctl(P_PID, pid, PROC_NO_NEW_PRIVS_STATUS, &arg);
|
|
break;
|
|
#ifdef PROC_KPTI_CTL
|
|
case MODE_KPTI:
|
|
error = procctl(P_PID, pid, PROC_KPTI_STATUS, &arg);
|
|
break;
|
|
#endif
|
|
#ifdef PROC_LA_CTL
|
|
case MODE_LA57:
|
|
case MODE_LA48:
|
|
error = procctl(P_PID, pid, PROC_LA_STATUS, &arg);
|
|
break;
|
|
#endif
|
|
default:
|
|
usage();
|
|
break;
|
|
}
|
|
if (error != 0)
|
|
err(1, "procctl status");
|
|
switch (mode) {
|
|
case MODE_ASLR:
|
|
switch (arg & ~PROC_ASLR_ACTIVE) {
|
|
case PROC_ASLR_FORCE_ENABLE:
|
|
printf("force enabled");
|
|
break;
|
|
case PROC_ASLR_FORCE_DISABLE:
|
|
printf("force disabled");
|
|
break;
|
|
case PROC_ASLR_NOFORCE:
|
|
printf("not forced");
|
|
break;
|
|
}
|
|
if ((arg & PROC_ASLR_ACTIVE) != 0)
|
|
printf(", active\n");
|
|
else
|
|
printf(", not active\n");
|
|
break;
|
|
case MODE_TRACE:
|
|
if (arg == -1)
|
|
printf("disabled\n");
|
|
else if (arg == 0)
|
|
printf("enabled, no debugger\n");
|
|
else
|
|
printf("enabled, traced by %d\n", arg);
|
|
break;
|
|
case MODE_TRAPCAP:
|
|
switch (arg) {
|
|
case PROC_TRAPCAP_CTL_ENABLE:
|
|
printf("enabled\n");
|
|
break;
|
|
case PROC_TRAPCAP_CTL_DISABLE:
|
|
printf("disabled\n");
|
|
break;
|
|
}
|
|
break;
|
|
case MODE_PROTMAX:
|
|
switch (arg & ~PROC_PROTMAX_ACTIVE) {
|
|
case PROC_PROTMAX_FORCE_ENABLE:
|
|
printf("force enabled");
|
|
break;
|
|
case PROC_PROTMAX_FORCE_DISABLE:
|
|
printf("force disabled");
|
|
break;
|
|
case PROC_PROTMAX_NOFORCE:
|
|
printf("not forced");
|
|
break;
|
|
}
|
|
if ((arg & PROC_PROTMAX_ACTIVE) != 0)
|
|
printf(", active\n");
|
|
else
|
|
printf(", not active\n");
|
|
break;
|
|
case MODE_STACKGAP:
|
|
switch (arg & (PROC_STACKGAP_ENABLE |
|
|
PROC_STACKGAP_DISABLE)) {
|
|
case PROC_STACKGAP_ENABLE:
|
|
printf("enabled\n");
|
|
break;
|
|
case PROC_STACKGAP_DISABLE:
|
|
printf("disabled\n");
|
|
break;
|
|
}
|
|
switch (arg & (PROC_STACKGAP_ENABLE_EXEC |
|
|
PROC_STACKGAP_DISABLE_EXEC)) {
|
|
case PROC_STACKGAP_ENABLE_EXEC:
|
|
printf("enabled after exec\n");
|
|
break;
|
|
case PROC_STACKGAP_DISABLE_EXEC:
|
|
printf("disabled after exec\n");
|
|
break;
|
|
}
|
|
break;
|
|
case MODE_NO_NEW_PRIVS:
|
|
switch (arg) {
|
|
case PROC_NO_NEW_PRIVS_ENABLE:
|
|
printf("enabled\n");
|
|
break;
|
|
case PROC_NO_NEW_PRIVS_DISABLE:
|
|
printf("disabled\n");
|
|
break;
|
|
}
|
|
break;
|
|
#ifdef PROC_KPTI_CTL
|
|
case MODE_KPTI:
|
|
switch (arg & ~PROC_KPTI_STATUS_ACTIVE) {
|
|
case PROC_KPTI_CTL_ENABLE_ON_EXEC:
|
|
printf("enabled");
|
|
break;
|
|
case PROC_KPTI_CTL_DISABLE_ON_EXEC:
|
|
printf("disabled");
|
|
break;
|
|
}
|
|
if ((arg & PROC_KPTI_STATUS_ACTIVE) != 0)
|
|
printf(", active\n");
|
|
else
|
|
printf(", not active\n");
|
|
break;
|
|
#endif
|
|
#ifdef PROC_LA_CTL
|
|
case MODE_LA57:
|
|
case MODE_LA48:
|
|
switch (arg & ~(PROC_LA_STATUS_LA48 |
|
|
PROC_LA_STATUS_LA57)) {
|
|
case PROC_LA_CTL_LA48_ON_EXEC:
|
|
printf("la48 on exec");
|
|
break;
|
|
case PROC_LA_CTL_LA57_ON_EXEC:
|
|
printf("la57 on exec");
|
|
break;
|
|
case PROC_LA_CTL_DEFAULT_ON_EXEC:
|
|
printf("default on exec");
|
|
break;
|
|
}
|
|
if ((arg & PROC_LA_STATUS_LA48) != 0)
|
|
printf(", la48 active\n");
|
|
else if ((arg & PROC_LA_STATUS_LA57) != 0)
|
|
printf(", la57 active\n");
|
|
break;
|
|
#endif
|
|
}
|
|
} else {
|
|
switch (mode) {
|
|
case MODE_ASLR:
|
|
arg = enable ? PROC_ASLR_FORCE_ENABLE :
|
|
PROC_ASLR_FORCE_DISABLE;
|
|
error = procctl(P_PID, pid, PROC_ASLR_CTL, &arg);
|
|
break;
|
|
case MODE_TRACE:
|
|
arg = enable ? PROC_TRACE_CTL_ENABLE :
|
|
PROC_TRACE_CTL_DISABLE;
|
|
error = procctl(P_PID, pid, PROC_TRACE_CTL, &arg);
|
|
break;
|
|
case MODE_TRAPCAP:
|
|
arg = enable ? PROC_TRAPCAP_CTL_ENABLE :
|
|
PROC_TRAPCAP_CTL_DISABLE;
|
|
error = procctl(P_PID, pid, PROC_TRAPCAP_CTL, &arg);
|
|
break;
|
|
case MODE_PROTMAX:
|
|
arg = enable ? PROC_PROTMAX_FORCE_ENABLE :
|
|
PROC_PROTMAX_FORCE_DISABLE;
|
|
error = procctl(P_PID, pid, PROC_PROTMAX_CTL, &arg);
|
|
break;
|
|
case MODE_STACKGAP:
|
|
arg = enable ? PROC_STACKGAP_ENABLE_EXEC :
|
|
(PROC_STACKGAP_DISABLE |
|
|
PROC_STACKGAP_DISABLE_EXEC);
|
|
error = procctl(P_PID, pid, PROC_STACKGAP_CTL, &arg);
|
|
break;
|
|
case MODE_NO_NEW_PRIVS:
|
|
arg = enable ? PROC_NO_NEW_PRIVS_ENABLE :
|
|
PROC_NO_NEW_PRIVS_DISABLE;
|
|
error = procctl(P_PID, pid, PROC_NO_NEW_PRIVS_CTL, &arg);
|
|
break;
|
|
#ifdef PROC_KPTI_CTL
|
|
case MODE_KPTI:
|
|
arg = enable ? PROC_KPTI_CTL_ENABLE_ON_EXEC :
|
|
PROC_KPTI_CTL_DISABLE_ON_EXEC;
|
|
error = procctl(P_PID, pid, PROC_KPTI_CTL, &arg);
|
|
break;
|
|
#endif
|
|
#ifdef PROC_LA_CTL
|
|
case MODE_LA57:
|
|
arg = enable ? PROC_LA_CTL_LA57_ON_EXEC :
|
|
PROC_LA_CTL_DEFAULT_ON_EXEC;
|
|
error = procctl(P_PID, pid, PROC_LA_CTL, &arg);
|
|
break;
|
|
case MODE_LA48:
|
|
arg = enable ? PROC_LA_CTL_LA48_ON_EXEC :
|
|
PROC_LA_CTL_DEFAULT_ON_EXEC;
|
|
error = procctl(P_PID, pid, PROC_LA_CTL, &arg);
|
|
break;
|
|
#endif
|
|
default:
|
|
usage();
|
|
break;
|
|
}
|
|
if (error != 0)
|
|
err(1, "procctl ctl");
|
|
if (do_command) {
|
|
error = execvp(argv[0], argv);
|
|
err(1, "exec");
|
|
}
|
|
}
|
|
exit(0);
|
|
}
|