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jpp |
1.1 |
From 9fb528332f48de59d70d48686e3af4df70206635 Mon Sep 17 00:00:00 2001 |
| 2 |
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From: Stefan Metzmacher <metze@samba.org> |
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Date: Tue, 29 Aug 2017 17:06:21 +0200 |
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Subject: [PATCH 1/7] CVE-2017-12150: s3:popt_common: don't turn a guessed |
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username into a specified one |
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BUG: https://bugzilla.samba.org/show_bug.cgi?id=12997 |
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Signed-off-by: Stefan Metzmacher <metze@samba.org> |
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--- |
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source3/include/auth_info.h | 1 + |
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source3/lib/popt_common.c | 6 +----- |
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source3/lib/util_cmdline.c | 29 +++++++++++++++++++++++++++++ |
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3 files changed, 31 insertions(+), 5 deletions(-) |
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diff --git a/source3/include/auth_info.h b/source3/include/auth_info.h |
| 17 |
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index c6f71ad..8212c27 100644 |
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--- a/source3/include/auth_info.h |
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+++ b/source3/include/auth_info.h |
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@@ -29,6 +29,7 @@ void set_cmdline_auth_info_from_file(struct user_auth_info *auth_info, |
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const char *get_cmdline_auth_info_username(const struct user_auth_info *auth_info); |
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void set_cmdline_auth_info_username(struct user_auth_info *auth_info, |
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const char *username); |
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+void reset_cmdline_auth_info_username(struct user_auth_info *auth_info); |
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const char *get_cmdline_auth_info_domain(const struct user_auth_info *auth_info); |
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void set_cmdline_auth_info_domain(struct user_auth_info *auth_info, |
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const char *domain); |
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diff --git a/source3/lib/popt_common.c b/source3/lib/popt_common.c |
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index 9928c70..36b5e92 100644 |
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--- a/source3/lib/popt_common.c |
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+++ b/source3/lib/popt_common.c |
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@@ -238,7 +238,6 @@ void popt_common_credentials_set_delay_post(void) |
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void popt_common_credentials_post(void) |
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{ |
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struct user_auth_info *auth_info = cmdline_auth_info; |
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- const char *username = NULL; |
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if (get_cmdline_auth_info_use_machine_account(auth_info) && |
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!set_cmdline_auth_info_machine_account_creds(auth_info)) |
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@@ -259,10 +258,7 @@ void popt_common_credentials_post(void) |
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* correctly parsed yet. If we have a username we need to set it again |
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* to run the string parser for the username correctly. |
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*/ |
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- username = get_cmdline_auth_info_username(auth_info); |
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- if (username != NULL && username[0] != '\0') { |
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- set_cmdline_auth_info_username(auth_info, username); |
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- } |
| 48 |
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+ reset_cmdline_auth_info_username(auth_info); |
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} |
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| 51 |
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static void popt_common_credentials_callback(poptContext con, |
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diff --git a/source3/lib/util_cmdline.c b/source3/lib/util_cmdline.c |
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index ad51a4f..80142e2 100644 |
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--- a/source3/lib/util_cmdline.c |
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+++ b/source3/lib/util_cmdline.c |
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@@ -37,6 +37,7 @@ |
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struct user_auth_info { |
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struct cli_credentials *creds; |
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struct loadparm_context *lp_ctx; |
| 60 |
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+ bool got_username; |
| 61 |
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bool got_pass; |
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int signing_state; |
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bool smb_encrypt; |
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@@ -93,6 +94,7 @@ void set_cmdline_auth_info_from_file(struct user_auth_info *auth_info, |
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if (!ok) { |
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exit(EIO); |
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} |
| 68 |
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+ auth_info->got_username = true; |
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} |
| 70 |
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| 71 |
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const char *get_cmdline_auth_info_username(const struct user_auth_info *auth_info) |
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@@ -123,11 +125,38 @@ void set_cmdline_auth_info_username(struct user_auth_info *auth_info, |
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exit(ENOMEM); |
| 74 |
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} |
| 75 |
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| 76 |
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+ auth_info->got_username = true; |
| 77 |
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if (strchr_m(username, '%') != NULL) { |
| 78 |
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auth_info->got_pass = true; |
| 79 |
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} |
| 80 |
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} |
| 81 |
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| 82 |
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+void reset_cmdline_auth_info_username(struct user_auth_info *auth_info) |
| 83 |
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+{ |
| 84 |
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+ const char *username = NULL; |
| 85 |
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+ const char *new_val = NULL; |
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+ |
| 87 |
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+ if (!auth_info->got_username) { |
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+ return; |
| 89 |
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+ } |
| 90 |
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+ |
| 91 |
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+ username = cli_credentials_get_username(auth_info->creds); |
| 92 |
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+ if (username == NULL) { |
| 93 |
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+ return; |
| 94 |
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+ } |
| 95 |
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+ if (username[0] == '\0') { |
| 96 |
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+ return; |
| 97 |
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+ } |
| 98 |
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+ |
| 99 |
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+ cli_credentials_parse_string(auth_info->creds, |
| 100 |
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+ username, |
| 101 |
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+ CRED_SPECIFIED); |
| 102 |
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+ new_val = cli_credentials_get_username(auth_info->creds); |
| 103 |
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+ if (new_val == NULL) { |
| 104 |
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+ exit(ENOMEM); |
| 105 |
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+ } |
| 106 |
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+} |
| 107 |
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+ |
| 108 |
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const char *get_cmdline_auth_info_domain(const struct user_auth_info *auth_info) |
| 109 |
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{ |
| 110 |
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const char *domain = NULL; |
| 111 |
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-- |
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1.9.1 |
| 113 |
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| 114 |
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From 97a7ddff5d327bf5bcc27c8a88b000b3a187a827 Mon Sep 17 00:00:00 2001 |
| 116 |
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From: Stefan Metzmacher <metze@samba.org> |
| 117 |
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Date: Thu, 3 Nov 2016 17:16:43 +0100 |
| 118 |
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Subject: [PATCH 2/7] CVE-2017-12150: s3:lib: |
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get_cmdline_auth_info_signing_state smb_encrypt SMB_SIGNING_REQUIRED |
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| 121 |
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This is an addition to the fixes for CVE-2015-5296. |
| 122 |
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| 123 |
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It applies to smb2mount -e, smbcacls -e and smbcquotas -e. |
| 124 |
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| 125 |
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BUG: https://bugzilla.samba.org/show_bug.cgi?id=12997 |
| 126 |
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| 127 |
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Signed-off-by: Stefan Metzmacher <metze@samba.org> |
| 128 |
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--- |
| 129 |
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source3/lib/util_cmdline.c | 3 +++ |
| 130 |
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1 file changed, 3 insertions(+) |
| 131 |
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| 132 |
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diff --git a/source3/lib/util_cmdline.c b/source3/lib/util_cmdline.c |
| 133 |
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index 80142e2..90ee67c 100644 |
| 134 |
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--- a/source3/lib/util_cmdline.c |
| 135 |
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+++ b/source3/lib/util_cmdline.c |
| 136 |
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@@ -265,6 +265,9 @@ void set_cmdline_auth_info_signing_state_raw(struct user_auth_info *auth_info, |
| 137 |
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| 138 |
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int get_cmdline_auth_info_signing_state(const struct user_auth_info *auth_info) |
| 139 |
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{ |
| 140 |
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+ if (auth_info->smb_encrypt) { |
| 141 |
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+ return SMB_SIGNING_REQUIRED; |
| 142 |
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+ } |
| 143 |
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return auth_info->signing_state; |
| 144 |
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} |
| 145 |
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| 146 |
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-- |
| 147 |
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1.9.1 |
| 148 |
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| 149 |
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| 150 |
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From b760a464ee3d94edeff6eb10a0b08359d6e98099 Mon Sep 17 00:00:00 2001 |
| 151 |
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From: Stefan Metzmacher <metze@samba.org> |
| 152 |
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Date: Fri, 9 Dec 2016 09:26:32 +0100 |
| 153 |
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Subject: [PATCH 3/7] CVE-2017-12150: s3:pylibsmb: make use of |
| 154 |
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SMB_SIGNING_DEFAULT for 'samba.samba3.libsmb_samba_internal' |
| 155 |
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| 156 |
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BUG: https://bugzilla.samba.org/show_bug.cgi?id=12997 |
| 157 |
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| 158 |
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Signed-off-by: Stefan Metzmacher <metze@samba.org> |
| 159 |
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--- |
| 160 |
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source3/libsmb/pylibsmb.c | 2 +- |
| 161 |
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1 file changed, 1 insertion(+), 1 deletion(-) |
| 162 |
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| 163 |
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diff --git a/source3/libsmb/pylibsmb.c b/source3/libsmb/pylibsmb.c |
| 164 |
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index 59c0998..350c6d4 100644 |
| 165 |
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--- a/source3/libsmb/pylibsmb.c |
| 166 |
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+++ b/source3/libsmb/pylibsmb.c |
| 167 |
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@@ -444,7 +444,7 @@ static int py_cli_state_init(struct py_cli_state *self, PyObject *args, |
| 168 |
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| 169 |
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req = cli_full_connection_creds_send( |
| 170 |
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NULL, self->ev, "myname", host, NULL, 0, share, "?????", |
| 171 |
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- cli_creds, 0, 0); |
| 172 |
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+ cli_creds, 0, SMB_SIGNING_DEFAULT); |
| 173 |
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if (!py_tevent_req_wait_exc(self->ev, req)) { |
| 174 |
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return -1; |
| 175 |
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} |
| 176 |
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-- |
| 177 |
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1.9.1 |
| 178 |
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| 179 |
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| 180 |
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From f42ffde214c3be1d6ba3afd8fe88a3e04470c4bd Mon Sep 17 00:00:00 2001 |
| 181 |
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From: Stefan Metzmacher <metze@samba.org> |
| 182 |
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Date: Mon, 12 Dec 2016 05:49:46 +0100 |
| 183 |
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Subject: [PATCH 4/7] CVE-2017-12150: libgpo: make use of SMB_SIGNING_REQUIRED |
| 184 |
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in gpo_connect_server() |
| 185 |
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| 186 |
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It's important that we use a signed connection to get the GPOs! |
| 187 |
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| 188 |
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BUG: https://bugzilla.samba.org/show_bug.cgi?id=12997 |
| 189 |
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| 190 |
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Signed-off-by: Stefan Metzmacher <metze@samba.org> |
| 191 |
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--- |
| 192 |
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libgpo/gpo_fetch.c | 2 +- |
| 193 |
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1 file changed, 1 insertion(+), 1 deletion(-) |
| 194 |
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| 195 |
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diff --git a/libgpo/gpo_fetch.c b/libgpo/gpo_fetch.c |
| 196 |
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index 836bc23..3740d4e 100644 |
| 197 |
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--- a/libgpo/gpo_fetch.c |
| 198 |
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+++ b/libgpo/gpo_fetch.c |
| 199 |
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@@ -133,7 +133,7 @@ static NTSTATUS gpo_connect_server(ADS_STRUCT *ads, |
| 200 |
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ads->auth.password, |
| 201 |
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CLI_FULL_CONNECTION_USE_KERBEROS | |
| 202 |
|
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CLI_FULL_CONNECTION_FALLBACK_AFTER_KERBEROS, |
| 203 |
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- Undefined); |
| 204 |
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+ SMB_SIGNING_REQUIRED); |
| 205 |
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if (!NT_STATUS_IS_OK(result)) { |
| 206 |
|
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DEBUG(10,("check_refresh_gpo: " |
| 207 |
|
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"failed to connect: %s\n", |
| 208 |
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-- |
| 209 |
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1.9.1 |
| 210 |
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|
| 211 |
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| 212 |
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From d8c6aceb94ab72991eb538ab5dc388686a177052 Mon Sep 17 00:00:00 2001 |
| 213 |
|
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From: Stefan Metzmacher <metze@samba.org> |
| 214 |
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Date: Tue, 29 Aug 2017 15:24:14 +0200 |
| 215 |
|
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Subject: [PATCH 5/7] CVE-2017-12150: auth/credentials: |
| 216 |
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cli_credentials_authentication_requested() should check for |
| 217 |
|
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NTLM_CCACHE/SIGN/SEAL |
| 218 |
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| 219 |
|
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BUG: https://bugzilla.samba.org/show_bug.cgi?id=12997 |
| 220 |
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| 221 |
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Signed-off-by: Stefan Metzmacher <metze@samba.org> |
| 222 |
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--- |
| 223 |
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auth/credentials/credentials.c | 16 ++++++++++++++++ |
| 224 |
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1 file changed, 16 insertions(+) |
| 225 |
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| 226 |
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diff --git a/auth/credentials/credentials.c b/auth/credentials/credentials.c |
| 227 |
|
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index 06648c7..5e3b5e8 100644 |
| 228 |
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--- a/auth/credentials/credentials.c |
| 229 |
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+++ b/auth/credentials/credentials.c |
| 230 |
|
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@@ -25,6 +25,7 @@ |
| 231 |
|
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#include "librpc/gen_ndr/samr.h" /* for struct samrPassword */ |
| 232 |
|
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#include "auth/credentials/credentials.h" |
| 233 |
|
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#include "auth/credentials/credentials_internal.h" |
| 234 |
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+#include "auth/gensec/gensec.h" |
| 235 |
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#include "libcli/auth/libcli_auth.h" |
| 236 |
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#include "tevent.h" |
| 237 |
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#include "param/param.h" |
| 238 |
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@@ -300,6 +301,8 @@ _PUBLIC_ bool cli_credentials_set_principal_callback(struct cli_credentials *cre |
| 239 |
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| 240 |
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_PUBLIC_ bool cli_credentials_authentication_requested(struct cli_credentials *cred) |
| 241 |
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{ |
| 242 |
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+ uint32_t gensec_features = 0; |
| 243 |
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+ |
| 244 |
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if (cred->bind_dn) { |
| 245 |
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return true; |
| 246 |
|
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} |
| 247 |
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@@ -327,6 +330,19 @@ _PUBLIC_ bool cli_credentials_authentication_requested(struct cli_credentials *c |
| 248 |
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return true; |
| 249 |
|
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} |
| 250 |
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| 251 |
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+ gensec_features = cli_credentials_get_gensec_features(cred); |
| 252 |
|
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+ if (gensec_features & GENSEC_FEATURE_NTLM_CCACHE) { |
| 253 |
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+ return true; |
| 254 |
|
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+ } |
| 255 |
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+ |
| 256 |
|
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+ if (gensec_features & GENSEC_FEATURE_SIGN) { |
| 257 |
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+ return true; |
| 258 |
|
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+ } |
| 259 |
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+ |
| 260 |
|
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+ if (gensec_features & GENSEC_FEATURE_SEAL) { |
| 261 |
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+ return true; |
| 262 |
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+ } |
| 263 |
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+ |
| 264 |
|
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return false; |
| 265 |
|
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} |
| 266 |
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| 267 |
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-- |
| 268 |
|
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1.9.1 |
| 269 |
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|
|
| 270 |
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| 271 |
|
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From 28f4a8dbd2b82bb8fb9f6224e1641d935766e62a Mon Sep 17 00:00:00 2001 |
| 272 |
|
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From: Stefan Metzmacher <metze@samba.org> |
| 273 |
|
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Date: Tue, 29 Aug 2017 15:35:49 +0200 |
| 274 |
|
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Subject: [PATCH 6/7] CVE-2017-12150: libcli/smb: add |
| 275 |
|
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smbXcli_conn_signing_mandatory() |
| 276 |
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| 277 |
|
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BUG: https://bugzilla.samba.org/show_bug.cgi?id=12997 |
| 278 |
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| 279 |
|
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Signed-off-by: Stefan Metzmacher <metze@samba.org> |
| 280 |
|
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--- |
| 281 |
|
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libcli/smb/smbXcli_base.c | 5 +++++ |
| 282 |
|
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libcli/smb/smbXcli_base.h | 1 + |
| 283 |
|
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2 files changed, 6 insertions(+) |
| 284 |
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| 285 |
|
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diff --git a/libcli/smb/smbXcli_base.c b/libcli/smb/smbXcli_base.c |
| 286 |
|
|
index b21d796..239e5eb 100644 |
| 287 |
|
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--- a/libcli/smb/smbXcli_base.c |
| 288 |
|
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+++ b/libcli/smb/smbXcli_base.c |
| 289 |
|
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@@ -468,6 +468,11 @@ bool smbXcli_conn_use_unicode(struct smbXcli_conn *conn) |
| 290 |
|
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return false; |
| 291 |
|
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} |
| 292 |
|
|
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| 293 |
|
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+bool smbXcli_conn_signing_mandatory(struct smbXcli_conn *conn) |
| 294 |
|
|
+{ |
| 295 |
|
|
+ return conn->mandatory_signing; |
| 296 |
|
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+} |
| 297 |
|
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+ |
| 298 |
|
|
void smbXcli_conn_set_sockopt(struct smbXcli_conn *conn, const char *options) |
| 299 |
|
|
{ |
| 300 |
|
|
set_socket_options(conn->sock_fd, options); |
| 301 |
|
|
diff --git a/libcli/smb/smbXcli_base.h b/libcli/smb/smbXcli_base.h |
| 302 |
|
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index e48fc35..2594f07 100644 |
| 303 |
|
|
--- a/libcli/smb/smbXcli_base.h |
| 304 |
|
|
+++ b/libcli/smb/smbXcli_base.h |
| 305 |
|
|
@@ -47,6 +47,7 @@ bool smbXcli_conn_dfs_supported(struct smbXcli_conn *conn); |
| 306 |
|
|
|
| 307 |
|
|
enum protocol_types smbXcli_conn_protocol(struct smbXcli_conn *conn); |
| 308 |
|
|
bool smbXcli_conn_use_unicode(struct smbXcli_conn *conn); |
| 309 |
|
|
+bool smbXcli_conn_signing_mandatory(struct smbXcli_conn *conn); |
| 310 |
|
|
|
| 311 |
|
|
void smbXcli_conn_set_sockopt(struct smbXcli_conn *conn, const char *options); |
| 312 |
|
|
const struct sockaddr_storage *smbXcli_conn_local_sockaddr(struct smbXcli_conn *conn); |
| 313 |
|
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-- |
| 314 |
|
|
1.9.1 |
| 315 |
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|
|
| 316 |
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|
|
| 317 |
|
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From 28506663282a1457708c38c58437e9eb9c0002bf Mon Sep 17 00:00:00 2001 |
| 318 |
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From: Stefan Metzmacher <metze@samba.org> |
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Date: Mon, 12 Dec 2016 06:07:56 +0100 |
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Subject: [PATCH 7/7] CVE-2017-12150: s3:libsmb: only fallback to anonymous if |
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authentication was not requested |
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With forced encryption or required signing we should also don't fallback. |
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BUG: https://bugzilla.samba.org/show_bug.cgi?id=12997 |
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Signed-off-by: Stefan Metzmacher <metze@samba.org> |
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--- |
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source3/libsmb/clidfs.c | 16 ++++------------ |
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1 file changed, 4 insertions(+), 12 deletions(-) |
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diff --git a/source3/libsmb/clidfs.c b/source3/libsmb/clidfs.c |
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index 75012b2..fdcd665 100644 |
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--- a/source3/libsmb/clidfs.c |
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+++ b/source3/libsmb/clidfs.c |
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@@ -26,6 +26,7 @@ |
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#include "trans2.h" |
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#include "libsmb/nmblib.h" |
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#include "../libcli/smb/smbXcli_base.h" |
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+#include "auth/credentials/credentials.h" |
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/******************************************************************** |
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Important point. |
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@@ -145,9 +146,6 @@ static NTSTATUS do_connect(TALLOC_CTX *ctx, |
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char *servicename; |
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char *sharename; |
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char *newserver, *newshare; |
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- const char *username; |
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- const char *password; |
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- const char *domain; |
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NTSTATUS status; |
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int flags = 0; |
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int signing_state = get_cmdline_auth_info_signing_state(auth_info); |
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@@ -225,21 +223,15 @@ static NTSTATUS do_connect(TALLOC_CTX *ctx, |
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smb2cli_conn_set_max_credits(c->conn, DEFAULT_SMB2_MAX_CREDITS); |
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} |
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- username = get_cmdline_auth_info_username(auth_info); |
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- password = get_cmdline_auth_info_password(auth_info); |
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- domain = get_cmdline_auth_info_domain(auth_info); |
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- if ((domain == NULL) || (domain[0] == '\0')) { |
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- domain = lp_workgroup(); |
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- } |
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- |
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creds = get_cmdline_auth_info_creds(auth_info); |
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status = cli_session_setup_creds(c, creds); |
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if (!NT_STATUS_IS_OK(status)) { |
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/* If a password was not supplied then |
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* try again with a null username. */ |
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- if (password[0] || !username[0] || |
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- get_cmdline_auth_info_use_kerberos(auth_info) || |
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+ if (force_encrypt || smbXcli_conn_signing_mandatory(c->conn) || |
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+ cli_credentials_authentication_requested(creds) || |
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+ cli_credentials_is_anonymous(creds) || |
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!NT_STATUS_IS_OK(status = cli_session_setup_anon(c))) |
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{ |
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d_printf("session setup failed: %s\n", |
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-- |
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1.9.1 |
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