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
|
From cfe13b7a217075ae741c018da50cd600e5330de2 Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@suse.cz>
Date: Fri, 22 May 2015 10:58:43 +0200
Subject: [PATCH] libfuse: fix exec environment for mount and umount
Found by Tavis Ormandy (CVE-2015-3202).
Upstream-Status: Submitted
Signed-off-by: Tudor Florea <tudor.florea@enea.com>
---
--- a/lib/mount_util.c
+++ b/lib/mount_util.c
@@ -95,10 +95,12 @@ static int add_mount(const char *prognam
goto out_restore;
}
if (res == 0) {
+ char *env = NULL;
+
sigprocmask(SIG_SETMASK, &oldmask, NULL);
setuid(geteuid());
- execl("/bin/mount", "/bin/mount", "--no-canonicalize", "-i",
- "-f", "-t", type, "-o", opts, fsname, mnt, NULL);
+ execle("/bin/mount", "/bin/mount", "--no-canonicalize", "-i",
+ "-f", "-t", type, "-o", opts, fsname, mnt, NULL, &env);
fprintf(stderr, "%s: failed to execute /bin/mount: %s\n",
progname, strerror(errno));
exit(1);
@@ -146,10 +148,17 @@ static int exec_umount(const char *progn
goto out_restore;
}
if (res == 0) {
+ char *env = NULL;
+
sigprocmask(SIG_SETMASK, &oldmask, NULL);
setuid(geteuid());
- execl("/bin/umount", "/bin/umount", "-i", rel_mnt,
- lazy ? "-l" : NULL, NULL);
+ if (lazy) {
+ execle("/bin/umount", "/bin/umount", "-i", rel_mnt,
+ "-l", NULL, &env);
+ } else {
+ execle("/bin/umount", "/bin/umount", "-i", rel_mnt,
+ NULL, &env);
+ }
fprintf(stderr, "%s: failed to execute /bin/umount: %s\n",
progname, strerror(errno));
exit(1);
@@ -205,10 +214,12 @@ static int remove_mount(const char *prog
goto out_restore;
}
if (res == 0) {
+ char *env = NULL;
+
sigprocmask(SIG_SETMASK, &oldmask, NULL);
setuid(geteuid());
- execl("/bin/umount", "/bin/umount", "--no-canonicalize", "-i",
- "--fake", mnt, NULL);
+ execle("/bin/umount", "/bin/umount", "--no-canonicalize", "-i",
+ "--fake", mnt, NULL, &env);
fprintf(stderr, "%s: failed to execute /bin/umount: %s\n",
progname, strerror(errno));
exit(1);
|
