1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
|
/*
* Copyright (c) 2015 Joyent, Inc
* Author: Alex Wilson <alex.wilson@joyent.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "includes.h"
#ifdef SANDBOX_SOLARIS
#ifndef USE_SOLARIS_PRIVS
# error "--with-solaris-privs must be used with the Solaris sandbox"
#endif
#include <sys/types.h>
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#ifdef HAVE_PRIV_H
# include <priv.h>
#endif
#include "log.h"
#include "ssh-sandbox.h"
#include "xmalloc.h"
struct ssh_sandbox {
priv_set_t *pset;
};
struct ssh_sandbox *
ssh_sandbox_init(struct monitor *monitor)
{
struct ssh_sandbox *box = NULL;
box = xcalloc(1, sizeof(*box));
/* Start with "basic" and drop everything we don't need. */
box->pset = solaris_basic_privset();
if (box->pset == NULL) {
free(box);
return NULL;
}
/* Drop everything except the ability to use already-opened files */
if (priv_delset(box->pset, PRIV_FILE_LINK_ANY) != 0 ||
#ifdef PRIV_NET_ACCESS
priv_delset(box->pset, PRIV_NET_ACCESS) != 0 ||
#endif
#ifdef PRIV_DAX_ACCESS
priv_delset(box->pset, PRIV_DAX_ACCESS) != 0 ||
#endif
#ifdef PRIV_SYS_IB_INFO
priv_delset(box->pset, PRIV_SYS_IB_INFO) != 0 ||
#endif
priv_delset(box->pset, PRIV_PROC_EXEC) != 0 ||
priv_delset(box->pset, PRIV_PROC_FORK) != 0 ||
priv_delset(box->pset, PRIV_PROC_INFO) != 0 ||
priv_delset(box->pset, PRIV_PROC_SESSION) != 0) {
free(box);
return NULL;
}
/* These may not be available on older Solaris-es */
# if defined(PRIV_FILE_READ) && defined(PRIV_FILE_WRITE)
if (priv_delset(box->pset, PRIV_FILE_READ) != 0 ||
priv_delset(box->pset, PRIV_FILE_WRITE) != 0) {
free(box);
return NULL;
}
# endif
return box;
}
void
ssh_sandbox_child(struct ssh_sandbox *box)
{
if (setppriv(PRIV_SET, PRIV_PERMITTED, box->pset) != 0 ||
setppriv(PRIV_SET, PRIV_LIMIT, box->pset) != 0 ||
setppriv(PRIV_SET, PRIV_INHERITABLE, box->pset) != 0)
fatal("setppriv: %s", strerror(errno));
}
#endif /* SANDBOX_SOLARIS */
|