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dovecot/SOURCES/dovecot-2.3.8-CVE_2020_12674.patch
CentOS Sources 7e699f8952 import dovecot-2.3.8-4.el8
2021-09-09 16:10:43 +00:00

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From bd9d2fe7da833f0e4705a8280efc56930371806b Mon Sep 17 00:00:00 2001
From: Aki Tuomi <aki.tuomi@open-xchange.com>
Date: Wed, 6 May 2020 13:40:36 +0300
Subject: [PATCH 1/3] auth: mech-rpa - Fail on zero len buffer
---
src/auth/mech-rpa.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/auth/mech-rpa.c b/src/auth/mech-rpa.c
index 08298ebdd6..2de8705b4f 100644
--- a/src/auth/mech-rpa.c
+++ b/src/auth/mech-rpa.c
@@ -224,7 +224,7 @@ rpa_read_buffer(pool_t pool, const unsigned char **data,
return 0;
len = *p++;
- if (p + len > end)
+ if (p + len > end || len == 0)
return 0;
*buffer = p_malloc(pool, len);
--
2.11.0
From 98c39fd633adf9b1d11a7bad58ef0784a25042e6 Mon Sep 17 00:00:00 2001
From: Aki Tuomi <aki.tuomi@open-xchange.com>
Date: Mon, 18 May 2020 13:08:45 +0300
Subject: [PATCH 3/3] auth: test-mech - Add tests for RPA and NTLM bug
---
src/auth/test-mech.c | 66 ++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 66 insertions(+)
diff -up dovecot-2.3.8/src/auth/test-mech.c.CVE_2020_12674prereq dovecot-2.3.8/src/auth/test-mech.c
--- dovecot-2.3.8/src/auth/test-mech.c.CVE_2020_12674prereq 2020-08-07 20:46:56.095295825 +0200
+++ dovecot-2.3.8/src/auth/test-mech.c 2020-08-07 20:47:08.742124304 +0200
@@ -0,0 +1,196 @@
+/* Copyright (c) 2020 Dovecot authors, see the included COPYING file */
+
+#include "lib.h"
+#include "auth.h"
+#include "str.h"
+#include "auth-common.h"
+#include "auth-request.h"
+#include "auth-request-handler-private.h"
+#include "auth-settings.h"
+#include "otp.h"
+#include "mech-otp-skey-common.h"
+#include "settings-parser.h"
+#include "password-scheme.h"
+#include "test-common.h"
+#include "test-auth.h"
+#include "auth-token.h"
+
+#include <unistd.h>
+#include <time.h>
+
+#define UCHAR_LEN(str) (const unsigned char *)(str), sizeof(str)-1
+
+extern const struct mech_module mech_oauthbearer;
+extern const struct mech_module mech_otp;
+extern const struct mech_module mech_ntlm;
+extern const struct mech_module mech_rpa;
+
+static struct auth_settings set;
+static struct mechanisms_register *mech_reg;
+
+struct test_case {
+ const struct mech_module *mech;
+ const unsigned char *in;
+ size_t len;
+ const char *username;
+ const char *expect_error;
+ bool success;
+ bool set_username_before_test;
+ bool set_cert_username;
+};
+
+static void
+verify_plain_continue_mock_callback(struct auth_request *request,
+ verify_plain_callback_t *callback)
+{
+ request->passdb_success = TRUE;
+ callback(PASSDB_RESULT_OK, request);
+}
+
+static void
+request_handler_reply_mock_callback(struct auth_request *request,
+ enum auth_client_result result,
+ const void *auth_reply ATTR_UNUSED,
+ size_t reply_size ATTR_UNUSED)
+{
+ request->failed = result != AUTH_CLIENT_RESULT_SUCCESS;
+
+ if (request->passdb_result == PASSDB_RESULT_OK)
+ request->failed = FALSE;
+ else if (request->mech == &mech_otp) {
+ if (null_strcmp(request->user, "otp_phase_2") == 0)
+ request->failed = FALSE;
+ } else if (request->mech == &mech_oauthbearer) {
+ }
+};
+
+static void
+request_handler_reply_continue_mock_callback(struct auth_request *request,
+ const void *reply,
+ size_t reply_size)
+{
+ request->context = p_strndup(request->pool, reply, reply_size);
+}
+
+static void
+auth_client_request_mock_callback(const char *reply ATTR_UNUSED,
+ struct auth_client_connection *conn ATTR_UNUSED)
+{
+}
+
+static void test_mechs_init(void)
+{
+ const char *const services[] = {NULL};
+ process_start_time = time(NULL);
+
+ /* Copy default settings */
+ set = *(struct auth_settings *) auth_setting_parser_info.defaults;
+ global_auth_settings = &set;
+ global_auth_settings->base_dir = ".";
+ memset((&set)->username_chars_map, 1, sizeof((&set)->username_chars_map));
+ set.username_format = "";
+
+ t_array_init(&set.passdbs, 2);
+ struct auth_passdb_settings *mock_set = t_new(struct auth_passdb_settings, 1);
+ *mock_set = mock_passdb_set;
+ array_push_back(&set.passdbs, &mock_set);
+ mock_set = t_new(struct auth_passdb_settings, 1);
+ *mock_set = mock_passdb_set;
+ mock_set->master = TRUE;
+ array_push_back(&set.passdbs, &mock_set);
+ t_array_init(&set.userdbs, 1);
+
+ /* Disable stats */
+ set.stats = FALSE;
+
+ /* For tests of digest-md5. */
+ set.realms_arr = t_strsplit_spaces("example.com ", " ");
+ /* For tests of mech-anonymous. */
+ set.anonymous_username = "anonuser";
+
+ mech_init(global_auth_settings);
+ mech_reg = mech_register_init(global_auth_settings);
+ passdbs_init();
+ userdbs_init();
+ passdb_mock_mod_init();
+ password_schemes_init();
+
+ auths_preinit(&set, pool_datastack_create(), mech_reg, services);
+ auths_init();
+ auth_token_init();
+}
+
+
+static void test_rpa(void)
+{
+ test_mechs_init();
+ static struct auth_request_handler handler = {
+ .callback = auth_client_request_mock_callback,
+ .reply_callback = request_handler_reply_mock_callback,
+ .reply_continue_callback = request_handler_reply_continue_mock_callback,
+ .verify_plain_continue_callback = verify_plain_continue_mock_callback,
+ };
+
+ const struct mech_module *mech = &mech_rpa;
+ test_begin("test rpa");
+ struct auth_request *req = mech->auth_new();
+ global_auth_settings->realms_arr = t_strsplit("example.com", " ");
+ req->set = global_auth_settings;
+ req->service = "login";
+ req->handler = &handler;
+ req->mech_event = event_create(NULL);
+ req->event = event_create(NULL);
+ req->mech = mech;
+ req->state = AUTH_REQUEST_STATE_MECH_CONTINUE;
+ auth_request_state_count[AUTH_REQUEST_STATE_MECH_CONTINUE] = 1;
+ mech->auth_initial(req, UCHAR_LEN("\x60\x11\x06\x09\x60\x86\x48\x01\x86\xf8\x73\x01\x01\x01\x00\x04\x00\x00\x01"));
+ mech->auth_continue(req, UCHAR_LEN("\x60\x11\x06\x09\x60\x86\x48\x01\x86\xf8\x73\x01\x01\x00\x03A@A\x00"));
+ test_assert(req->failed == TRUE);
+ test_assert(req->passdb_success == FALSE);
+ event_unref(&req->mech_event);
+ event_unref(&req->event);
+ mech->auth_free(req);
+ test_end();
+}
+
+static void test_ntlm(void)
+{
+ static struct auth_request_handler handler = {
+ .callback = auth_client_request_mock_callback,
+ .reply_callback = request_handler_reply_mock_callback,
+ .reply_continue_callback = request_handler_reply_continue_mock_callback,
+ .verify_plain_continue_callback = verify_plain_continue_mock_callback,
+ };
+
+ const struct mech_module *mech = &mech_ntlm;
+ test_begin("test ntlm");
+ struct auth_request *req = mech->auth_new();
+ global_auth_settings->realms_arr = t_strsplit("example.com", " ");
+ req->set = global_auth_settings;
+ req->service = "login";
+ req->handler = &handler;
+ req->mech_event = event_create(NULL);
+ req->event = event_create(NULL);
+ req->mech = mech;
+ req->state = AUTH_REQUEST_STATE_MECH_CONTINUE;
+ auth_request_state_count[AUTH_REQUEST_STATE_MECH_CONTINUE] = 1;
+ mech->auth_initial(req, UCHAR_LEN("NTLMSSP\x00\x01\x00\x00\x00\x00\x02\x00\x00""AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"));
+ mech->auth_continue(req, UCHAR_LEN("NTLMSSP\x00\x03\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00""AA\x00\x00\x41\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00""orange""\x00"));
+ test_assert(req->failed == TRUE);
+ test_assert(req->passdb_success == FALSE);
+ event_unref(&req->mech_event);
+ event_unref(&req->event);
+ mech->auth_free(req);
+ test_end();
+}
+
+int main(void)
+{
+ static void (*const test_functions[])(void) = {
+ test_rpa,
+ test_ntlm,
+ NULL
+ };
+
+ return test_run(test_functions);
+}
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