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

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diff --git a/openbsd-compat/port-linux-sshd.c b/openbsd-compat/port-linux-sshd.c
index c18524e..d04f4ed 100644
--- a/openbsd-compat/port-linux-sshd.c
+++ b/openbsd-compat/port-linux-sshd.c
@@ -409,6 +409,28 @@ sshd_selinux_setup_exec_context(char *pwname)
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debug3("%s: done", __func__);
}
+void
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+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);
+ }
+}
+
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#endif
#endif
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diff --git a/openbsd-compat/port-linux.h b/openbsd-compat/port-linux.h
index 8ef6cc4..b18893c 100644
--- a/openbsd-compat/port-linux.h
+++ b/openbsd-compat/port-linux.h
@@ -25,6 +25,7 @@ void ssh_selinux_setup_pty(char *, const char *);
void ssh_selinux_change_context(const char *);
void ssh_selinux_setfscreatecon(const char *);
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+void sshd_selinux_copy_context(void);
void sshd_selinux_setup_exec_context(char *);
#endif
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diff --git a/session.c b/session.c
index 2bcf818..b5dc144 100644
--- a/session.c
+++ b/session.c
@@ -1532,7 +1532,7 @@ void
do_setusercontext(struct passwd *pw)
{
char *chroot_path, *tmp;
-#ifdef USE_LIBIAF
+#if defined(USE_LIBIAF) || defined(WITH_SELINUX)
int doing_chroot = 0;
#endif
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@@ -1538,6 +1538,9 @@ do_setusercontext(struct passwd *pw)
pw->pw_uid);
chroot_path = percent_expand(tmp, "h", pw->pw_dir,
"u", pw->pw_name, (char *)NULL);
+#ifdef WITH_SELINUX
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+ sshd_selinux_copy_context();
+#endif
safely_chroot(chroot_path, pw->pw_uid);
free(tmp);
free(chroot_path);
@@ -1557,7 +1557,7 @@ do_setusercontext(struct passwd *pw)
/* Make sure we don't attempt to chroot again */
free(options.chroot_directory);
options.chroot_directory = NULL;
-#ifdef USE_LIBIAF
+#if defined(USE_LIBIAF) || defined(WITH_SELINUX)
doing_chroot = 1;
#endif
}
@@ -1565,6 +1568,11 @@ do_setusercontext(struct passwd *pw)
/* Permanently switch to the desired uid. */
permanently_set_uid(pw);
#endif
+
+#ifdef WITH_SELINUX
+ if (doing_chroot == 0)
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+ 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");
@@ -1588,9 +1588,6 @@ 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);
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@@ -1826,9 +1835,6 @@ 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));
}
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diff --git a/sshd.c b/sshd.c
index 07f9926..a97f8b7 100644
--- a/sshd.c
+++ b/sshd.c
@@ -632,6 +632,10 @@ 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
+
/* Change our root directory */
if (chroot(_PATH_PRIVSEP_CHROOT_DIR) == -1)
fatal("chroot(\"%s\"): %s", _PATH_PRIVSEP_CHROOT_DIR,
@@ -755,6 +755,9 @@ privsep_postauth(Authctxt *authctxt)
#ifdef DISABLE_FD_PASSING
if (1) {
+#elif defined(WITH_SELINUX)
+ if (options.use_login) {
+ /* even root user can be confined by SELinux */
#else
if (authctxt->pw->pw_uid == 0 || options.use_login) {
#endif
diff --git a/session.c b/session.c
index 684f867..09048bc 100644
--- a/session.c
+++ b/session.c
@@ -1538,7 +1538,7 @@ do_setusercontext(struct passwd *pw)
platform_setusercontext(pw);
- if (platform_privileged_uidswap()) {
+ if (platform_privileged_uidswap() && !is_child) {
#ifdef HAVE_LOGIN_CAP
if (setusercontext(lc, pw, pw->pw_uid,
(LOGIN_SETALL & ~(LOGIN_SETPATH|LOGIN_SETUSER))) < 0) {