【高】Webmin 远程代码执行

@@ -20,7 +20,7 @@ require Exporter;#在 web-lib-funcs.pl 中添加函数#生成：# grep -h "^sub" web-lib-funcs.pl ui-lib.pl | sed -e 's/sub //' | xargs 回声@EXPORT = qw(read_file read_file_cached read_file_cached_with_stat write_file html_escape html_strip quote_escape quote_javascript tempname_dir tempname transname transname_timestamped trunc indexof indexoflc sysprint check_ipaddress check_ip6address generate_icon urlize un_urlize include copydata ReadParseMime ReadParse read_fully read_parse_mime_callback read_parse_mime_javascript PrintHeader header get_html_title get_html_framed_title get_html_status_line popup_header footer popup_footer load_module_preferences load_theme_library redirect kill_byname kill_byname_logged find_byname error popup_error register_error_handler call_error_handlers error_setup wait_for fast_wait_for has_command make_date file_chooser_button popup_window_button popup_window_link read_acl acl_filename acl_check get_miniserv_config_file get_miniserv_config put_miniserv_config restart_miniserv reload_miniserv check_os_support http_download complete_http_download http_post ftp_download ftp_upload no_proxy open_socket download_timeout ftp_command to_ipaddress to_ip6address to_hostname icons_table replace_meta replace_file_line read_file_lines flush_file_lines unflush_file_lines unix_user_input unix_group_input hlink user_chooser_button group_chooser_button foreign_check foreign_exists foreign_func_exists foreign_available foreign_require foreign_call foreign_config foreign_installed foreign_defined get_system_hostname get_webmin_version get_webmin_version_release get_module_acl get_group_module_acl save_module_acl save_group_module_acl init_config load_language_auto load_language text_subs text encode_base64 decode_base64 encode_base32 decode_base32 get_module_info get_all_module_infos list_themes get_theme_info list_languages safe_language read_env_file write_env_file lock_file unlock_file test_lock unlock_all_files can_lock_file webmin_log additional_log var_dump webmin_debug_log system_logged backquote_logged backquote_with_timeout backquote_command kill_logged rename_logged rename_file symlink_logged symlink_file link_file make_dir set_ownership_permissions unlink_logged unlink_file copy_source_dest move_source_dest remote_session_name remote_foreign_require remote_foreign_call remote_foreign_check remote_foreign_config remote_eval remote_write remote_read remote_finished remote_error_setup remote_rpc_call remote_multi_callback remote_multi_callback_error serialise_variable unserialise_variable other_groups date_chooser_button help_file seed_random disk_usage_kb recursive_disk_usage help_search_link make_http_connection validate_ssl_connection read_http_connection write_http_connection close_http_connection clean_environment reset_environment clean_language progress_callback switch_to_remote_user switch_to_unix_user eval_as_unix_user create_user_config_dirs create_missing_homedir filter_javascript resolve_links simplify_path same_file flush_webmin_caches list_usermods available_usermods get_available_module_infos get_visible_module_infos get_visible_modules_categories is_under_directory parse_http_url check_clicks_function load_entities_map entities_to_ascii get_product_name get_charset get_display_hostname save_module_config save_user_module_config nice_size get_perl_path get_goto_module select_all_link select_invert_link select_rows_link check_pid_file get_mod_lib module_root_directory list_mime_types guess_mime_type open_tempfile close_tempfile print_tempfile is_selinux_enabled get_clear_file_attributes reset_file_attributes cleanup_tempnames open_lock_tempfile END month_to_number number_to_month get_rbac_module_acl supports_rbac supports_ipv6 use_rbac_module_acl execute_command open_readfile open_execute_command translate_filename translate_command register_filename_callback register_command_callback capture_function_output capture_function_output_tempfile modules_chooser_button substitute_template substitute_pattern running_in_zone running_in_vserver running_in_xen running_in_openvz list_categories is_readonly_mode command_as_user list_osdn_mirrors convert_osdn_url get_current_dir supports_users supports_symlinks quote_path get_windows_root read_file_contents write_file_contents read_file_contents_limit unix_crypt split_quoted_string write_to_http_cache check_in_http_cache supports_javascript get_module_name get_module_variable clear_time_locale reset_time_locale callers_package web_libs_package get_userdb_string connect_userdb disconnect_userdb split_userdb_string uniquelc list_combined_webmin_menu list_modules_webmin_menu module_to_menu_item list_combined_system_info shell_is_bash compare_version_numbers convert_to_json convert_from_json print_json get_referer_relative get_webmin_email_url get_webmin_browser_url trim ui_link ui_help ui_img ui_link_button ui_table_start ui_table_end ui_table_row ui_table_hr ui_table_span ui_columns_start ui_columns_row ui_columns_header ui_checked_columns_row ui_radio_columns_row ui_columns_end ui_columns_table ui_form_columns_table ui_form_start ui_form_end ui_textbox ui_filebox ui_bytesbox ui_upload ui_password ui_hidden ui_select ui_multi_select ui_multi_select_javascript ui_radio ui_yesno_radio ui_checkbox ui_oneradio ui_textarea ui_user_textbox ui_users_textbox ui_group_textbox ui_groups_textbox ui_opt_textbox ui_submit ui_reset ui_button ui_date_input ui_buttons_start ui_buttons_end ui_buttons_row ui_buttons_hr ui_post_header ui_pre_footer ui_print_header ui_print_unbuffered_header ui_print_footer ui_config_link ui_print_endpage ui_subheading ui_links_row ui_hidden_javascript ui_hidden_start ui_hidden_end ui_hidden_table_row_start ui_hidden_table_row_end ui_hidden_table_start ui_hidden_table_end ui_tabs_start ui_tabs_end ui_tabs_start_tab ui_tabs_start_tabletab ui_tabs_end_tab ui_tabs_end_tabletab ui_max_text_width ui_radio_selector ui_radio_selector_javascript ui_grid_table ui_radio_table ui_up_down_arrows ui_hr ui_nav_link ui_confirmation_form ui_text_color ui_alert_box js_disable_inputs ui_page_flipper js_checkbox_disable js_redirect ui_webmin_link ui_line_break_double ui_details ui_read_file_contents_limit get_python_cmd get_buffer_size get_webprefix get_sub_ref_name setvar getvar delvar print_call_stack);@EXPORT = qw(read_file read_file_cached read_file_cached_with_stat write_file html_escape html_strip quote_escape quote_javascript tempname_dir tempname transname transname_timestamped trunc indexof indexoflc sysprint check_ipaddress check_ip6address generate_icon urlize un_urlize include copydata ReadParseMime ReadParse read_fully read_parse_mime_callback read_parse_mime_javascript PrintHeader header get_html_title get_html_framed_title get_html_status_line popup_header footer popup_footer load_module_preferences load_theme_library redirect kill_byname kill_byname_logged find_byname error popup_error register_error_handler call_error_handlers error_setup wait_for fast_wait_for has_command make_date file_chooser_button popup_window_button popup_window_link read_acl acl_filename acl_check get_miniserv_config_file get_miniserv_config put_miniserv_config restart_miniserv reload_miniserv check_os_support http_download complete_http_download http_post ftp_download ftp_upload no_proxy open_socket download_timeout ftp_command to_ipaddress to_ip6address to_hostname icons_table replace_meta replace_file_line read_file_lines flush_file_lines unflush_file_lines unix_user_input unix_group_input hlink user_chooser_button group_chooser_button foreign_check foreign_exists foreign_func_exists foreign_available foreign_require foreign_call foreign_config foreign_installed foreign_defined get_system_hostname get_webmin_version get_webmin_version_release get_module_acl get_group_module_acl save_module_acl save_group_module_acl init_config load_language_auto load_language text_subs text encode_base64 decode_base64 encode_base32 decode_base32 get_module_info get_all_module_infos list_themes get_theme_info list_languages safe_language read_env_file write_env_file lock_file unlock_file test_lock unlock_all_files can_lock_file webmin_log additional_log var_dump webmin_debug_log system_logged backquote_logged backquote_with_timeout backquote_command kill_logged rename_logged rename_file symlink_logged symlink_file link_file make_dir set_ownership_permissions unlink_logged unlink_file copy_source_dest move_source_dest remote_session_name remote_foreign_require remote_foreign_call remote_foreign_check remote_foreign_config remote_eval remote_write remote_read remote_finished remote_error_setup remote_rpc_call remote_multi_callback remote_multi_callback_error serialise_variable unserialise_variable other_groups date_chooser_button help_file seed_random disk_usage_kb recursive_disk_usage help_search_link make_http_connection validate_ssl_connection read_http_connection write_http_connection close_http_connection clean_environment reset_environment clean_language progress_callback switch_to_remote_user switch_to_unix_user eval_as_unix_user create_user_config_dirs create_missing_homedir filter_javascript resolve_links simplify_path same_file flush_webmin_caches list_usermods available_usermods get_available_module_infos get_visible_module_infos get_visible_modules_categories is_under_directory parse_http_url check_clicks_function load_entities_map entities_to_ascii get_product_name get_charset get_display_hostname save_module_config save_user_module_config nice_size get_perl_path get_goto_module select_all_link select_invert_link select_rows_link check_pid_file get_mod_lib module_root_directory list_mime_types guess_mime_type open_tempfile close_tempfile print_tempfile is_selinux_enabled get_clear_file_attributes reset_file_attributes cleanup_tempnames open_lock_tempfile END month_to_number number_to_month get_rbac_module_acl supports_rbac supports_ipv6 use_rbac_module_acl execute_command open_readfile open_execute_command translate_filename translate_command register_filename_callback register_command_callback capture_function_output capture_function_output_tempfile modules_chooser_button substitute_template substitute_pattern running_in_zone running_in_vserver running_in_xen running_in_openvz list_categories is_readonly_mode command_as_user list_osdn_mirrors convert_osdn_url get_current_dir supports_users supports_symlinks quote_path get_windows_root read_file_contents write_file_contents read_file_contents_limit unix_crypt split_quoted_string write_to_http_cache check_in_http_cache supports_javascript get_module_name get_module_variable clear_time_locale reset_time_locale callers_package web_libs_package get_userdb_string connect_userdb disconnect_userdb split_userdb_string uniquelc list_combined_webmin_menu list_modules_webmin_menu module_to_menu_item list_combined_system_info shell_is_bash compare_version_numbers convert_to_json convert_from_json print_json get_referer_relative get_webmin_email_url get_webmin_browser_url trim ui_link ui_help ui_img ui_link_button ui_table_start ui_table_end ui_table_row ui_table_hr ui_table_span ui_columns_start ui_columns_row ui_columns_header ui_checked_columns_row ui_radio_columns_row ui_columns_end ui_columns_table ui_form_columns_table ui_form_start ui_form_end ui_textbox ui_filebox ui_bytesbox ui_upload ui_password ui_hidden ui_select ui_multi_select ui_multi_select_javascript ui_radio ui_yesno_radio ui_checkbox ui_oneradio ui_textarea ui_user_textbox ui_users_textbox ui_group_textbox ui_groups_textbox ui_opt_textbox ui_submit ui_reset ui_button ui_date_input ui_buttons_start ui_buttons_end ui_buttons_row ui_buttons_hr ui_post_header ui_pre_footer ui_print_header ui_print_unbuffered_header ui_print_footer ui_config_link ui_print_endpage ui_subheading ui_links_row ui_hidden_javascript ui_hidden_start ui_hidden_end ui_hidden_table_row_start ui_hidden_table_row_end ui_hidden_table_start ui_hidden_table_end ui_tabs_start ui_tabs_end ui_tabs_start_tab ui_tabs_start_tabletab ui_tabs_end_tab ui_tabs_end_tabletab ui_max_text_width ui_radio_selector ui_radio_selector_javascript ui_grid_table ui_radio_table ui_up_down_arrows ui_hr ui_nav_link ui_confirmation_form ui_text_color ui_alert_box js_disable_inputs ui_page_flipper js_checkbox_disable js_redirect ui_webmin_link ui_line_break_double ui_details ui_read_file_contents_limit get_python_cmd get_buffer_size get_webprefix get_sub_ref_name setvar getvar delvar print_call_stack webmin_user_is_admin);
#在 web-lib.pl 中添加全局变量push(@EXPORT, qw(&unique));push(@EXPORT, qw($config_directory $var_directory $remote_error_handler %month_to_number_map %number_to_month_map $webmin_feedback_address $default_lang $default_charset $module_index_name $module_index_link %in $in @in $progress_callback_prefix $progress_callback_url $wait_for_debug $wait_for_input @matches $theme_no_table $webmin_logfile $pragma_no_cache));#主题中定义的函数push(@EXPORT, qw(&theme_post_save_domain &theme_post_save_domains &theme_post_save_server &theme_select_server &theme_select_domain &theme_post_save_folder &theme_post_change_modules &theme_address_button &theme_virtualmin_ui_rating_selector &theme_virtualmin_ui_show_cron_time &theme_virtualmin_ui_parse_cron_time &theme_virtualmin_ui_html_editor_bodytags &theme_virtualmin_ui_show_html_editor &theme_post_change_theme &theme_pre_change_theme));$called_from_webmin_core = 1;do "web-lib.pl";do "ui-lib.pl";1;

@@ -13,10 +13,7 @@ $force_lang = $default_lang;print "Content-type: text/plainnn";
#这个用户可以远程调用吗？%access = &get_module_acl();if ($access{'rpc'} == 0 || $access{'rpc'} == 2 &&    $base_remote_user ne 'admin' && $base_remote_user ne 'root' &&    $base_remote_user ne 'sysadm') {if (!&webmin_user_is_admin()) {  print "0 Invalid user for RPCn";  exit;  }# IPv6 会工作吗？&get_miniserv_config(%miniserv);$use_ipv6 = 0;if ($miniserv{'ipv6'}) {  eval "use Socket6";  $use_ipv6 = 1 if (!$@);  }# 寻找空闲端口$port = $miniserv{'port'} || 10000;$aerr = &allocate_socket(MAIN, $use_ipv6 ? MAIN6 : undef, $port);if ($aerr) {  print "0 $aerrn";  exit;  }if (open(RANDOM, "/dev/urandom")) {  local $tmpsid;  read(RANDOM, $tmpsid, 16);  $sid = lc(unpack('h*', $tmpsid));  close RANDOM;  }else {  $sid = time()*$$;  }$version = &get_webmin_version();print "1 $port $sid $versionn";#分叉并收听电话..$pid = fork();if ($pid < 0) {  die "fork() failed : $!";  }elsif ($pid) {  exit;  }untie(*STDIN);untie(*STDOUT);#接受 TCP 连接

@@ -27,10 +27,7 @@ $| = 1;print "Content-type: text/plainnn";
# 这个用户可以远程调用吗？%access = &get_module_acl();if ($access{'rpc'} == 0 || $access{'rpc'} == 2 &&    $base_remote_user ne 'admin' && $base_remote_user ne 'root' &&    $base_remote_user ne 'sysadm') {if (!&webmin_user_is_admin()) {  print &serialise_variable( { 'status' => 0 } );  exit;  }$arg = &unserialise_variable($rawarg);if ($arg->{'newsession'}) {  #需要 fork 一个新的 session-handler 进程  $fifo1 = &tempname();  $fifo2 = &tempname();  mkfifo($fifo1, 0700);  mkfifo($fifo2, 0700);  if (!fork()) {    # 这是真正发生执行的子进程ution really happens    $SIG{'ALRM'} = "fifo_timeout";    untie(*STDIN);    untie(*STDOUT);    close(STDIN);    close(STDOUT);    close(miniserv::SOCK);    local $stime = time();    local $rcount = 0;    while(1) {      local ($rawcmd, $cmd, @rv);

@@ -12118,6 +12118,20 @@ sub delvarreturn &globals('delete', $variable, $scope);}# webmin_user_is_admin([用户名])# 如果给定的用户应该被认为是完全信任的，则返回 1sub webmin_user_is_admin{my ($user) = @_;$user ||= $base_remote_user;my %access = &get_module_acl($user, "");return 1 if ($access{'rpc'} == 0);  # #可以进行任意的 RPC 调用return 0 if ($access{'rpc'} == 1);  # 无法生成 RPC # #假设标准管理员用户名具有 root 权限作为后备return $user eq 'admin' || $user eq 'root' || $user eq 'sysadm';}$done_web_lib_funcs = 1;1;