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