openssh/openssh-6.6p1-privsep-selinux.patch

122 lines
4.0 KiB
Diff
Raw Normal View History

diff -up openssh-7.4p1/openbsd-compat/port-linux.h.privsep-selinux openssh-7.4p1/openbsd-compat/port-linux.h
--- openssh-7.4p1/openbsd-compat/port-linux.h.privsep-selinux 2016-12-23 18:58:52.972122201 +0100
+++ openssh-7.4p1/openbsd-compat/port-linux.h 2016-12-23 18:58:52.974122201 +0100
@@ -23,6 +23,7 @@ void ssh_selinux_setup_pty(char *, const
void ssh_selinux_change_context(const char *);
void ssh_selinux_setfscreatecon(const char *);
+void sshd_selinux_copy_context(void);
void sshd_selinux_setup_exec_context(char *);
#endif
diff -up openssh-7.4p1/openbsd-compat/port-linux-sshd.c.privsep-selinux openssh-7.4p1/openbsd-compat/port-linux-sshd.c
--- openssh-7.4p1/openbsd-compat/port-linux-sshd.c.privsep-selinux 2016-12-23 18:58:52.973122201 +0100
+++ openssh-7.4p1/openbsd-compat/port-linux-sshd.c 2016-12-23 18:58:52.974122201 +0100
@@ -419,6 +419,28 @@ sshd_selinux_setup_exec_context(char *pw
2014-06-03 14:51:07 +00:00
debug3("%s: done", __func__);
}
+void
2014-06-03 14:51:07 +00:00
+sshd_selinux_copy_context(void)
+{
+ security_context_t *ctx;
+
+ if (!ssh_selinux_enabled())
+ return;
+
+ if (getexeccon((security_context_t *)&ctx) != 0) {
+ logit("%s: getcon failed with %s", __func__, strerror (errno));
+ return;
+ }
+ if (ctx != NULL) {
+ /* unset exec context before we will lose this capabililty */
+ if (setexeccon(NULL) != 0)
+ fatal("%s: setexeccon failed with %s", __func__, strerror (errno));
+ if (setcon(ctx) != 0)
+ fatal("%s: setcon failed with %s", __func__, strerror (errno));
+ freecon(ctx);
+ }
+}
+
2014-06-03 14:51:07 +00:00
#endif
#endif
diff -up openssh-7.4p1/session.c.privsep-selinux openssh-7.4p1/session.c
--- openssh-7.4p1/session.c.privsep-selinux 2016-12-19 05:59:41.000000000 +0100
+++ openssh-7.4p1/session.c 2016-12-23 18:58:52.974122201 +0100
@@ -1331,7 +1331,7 @@ do_setusercontext(struct passwd *pw)
2014-06-03 14:51:07 +00:00
platform_setusercontext(pw);
- if (platform_privileged_uidswap()) {
+ if (platform_privileged_uidswap() && (!is_child || !use_privsep)) {
#ifdef HAVE_LOGIN_CAP
if (setusercontext(lc, pw, pw->pw_uid,
(LOGIN_SETALL & ~(LOGIN_SETPATH|LOGIN_SETUSER))) < 0) {
@@ -1361,6 +1361,9 @@ do_setusercontext(struct passwd *pw)
(unsigned long long)pw->pw_uid);
chroot_path = percent_expand(tmp, "h", pw->pw_dir,
"u", pw->pw_name, "U", uidstr, (char *)NULL);
+#ifdef WITH_SELINUX
2014-06-03 14:51:07 +00:00
+ sshd_selinux_copy_context();
+#endif
safely_chroot(chroot_path, pw->pw_uid);
free(tmp);
free(chroot_path);
@@ -1396,6 +1399,11 @@ do_setusercontext(struct passwd *pw)
/* Permanently switch to the desired uid. */
permanently_set_uid(pw);
#endif
+
+#ifdef WITH_SELINUX
2016-02-19 13:42:33 +00:00
+ if (in_chroot == 0)
2014-06-03 14:51:07 +00:00
+ sshd_selinux_copy_context();
+#endif
} else if (options.chroot_directory != NULL &&
strcasecmp(options.chroot_directory, "none") != 0) {
fatal("server lacks privileges to chroot to ChrootDirectory");
@@ -1413,9 +1421,6 @@ do_pwchange(Session *s)
if (s->ttyfd != -1) {
fprintf(stderr,
"You must change your password now and login again!\n");
-#ifdef WITH_SELINUX
- setexeccon(NULL);
-#endif
#ifdef PASSWD_NEEDS_USERNAME
execl(_PATH_PASSWD_PROG, "passwd", s->pw->pw_name,
(char *)NULL);
@@ -1625,9 +1630,6 @@ do_child(Session *s, const char *command
argv[i] = NULL;
optind = optreset = 1;
__progname = argv[0];
-#ifdef WITH_SELINUX
- ssh_selinux_change_context("sftpd_t");
-#endif
exit(sftp_server_main(i, argv, s->pw));
}
diff -up openssh-7.4p1/sshd.c.privsep-selinux openssh-7.4p1/sshd.c
--- openssh-7.4p1/sshd.c.privsep-selinux 2016-12-23 18:58:52.973122201 +0100
+++ openssh-7.4p1/sshd.c 2016-12-23 18:59:13.808124269 +0100
@@ -540,6 +540,10 @@ privsep_preauth_child(void)
/* Demote the private keys to public keys. */
demote_sensitive_data();
+#ifdef WITH_SELINUX
+ ssh_selinux_change_context("sshd_net_t");
+#endif
+
2016-02-19 13:42:33 +00:00
/* Demote the child */
if (privsep_chroot) {
2016-02-19 13:42:33 +00:00
/* Change our root directory */
@@ -633,6 +637,9 @@ privsep_postauth(Authctxt *authctxt)
{
#ifdef DISABLE_FD_PASSING
if (1) {
+#elif defined(WITH_SELINUX)
+ if (0) {
+ /* even root user can be confined by SELinux */
#else
if (authctxt->pw->pw_uid == 0) {
#endif