M\u1ed9t nh\u00f3m c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u an ninh t\u1eeb \u0110\u1ea1i h\u1ecdc K\u1ef9 thu\u1eadt Graz v\u1eeba ch\u1ee9ng minh m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng m\u1edbi th\u00f4ng qua k\u00eanh b\u00ean, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 SnailLoad, c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u1eeb xa suy lu\u1eadn v\u1ec1 ho\u1ea1t \u0111\u1ed9ng web c\u1ee7a ng\u01b0\u1eddi d\u00f9ng.<\/p>\n\n\n\n
“SnailLoad l\u1ee3i d\u1ee5ng m\u1ed9t \u0111i\u1ec3m ngh\u1ebdn hi\u1ec7n c\u00f3 tr\u00ean t\u1ea5t c\u1ea3 c\u00e1c k\u1ebft n\u1ed1i Internet”, c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u cho bi\u1ebft trong m\u1ed9t nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c c\u00f4ng b\u1ed1 tu\u1ea7n n\u00e0y.<\/p>\n\n\n\n
“\u0110i\u1ec3m ngh\u1ebdn n\u00e0y \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 tr\u1ec5 c\u1ee7a c\u00e1c g\u00f3i tin m\u1ea1ng, cho ph\u00e9p k\u1ebb t\u1ea5n c\u00f4ng suy lu\u1eadn v\u1ec1 ho\u1ea1t \u0111\u1ed9ng m\u1ea1ng hi\u1ec7n t\u1ea1i tr\u00ean k\u1ebft n\u1ed1i Internet c\u1ee7a ng\u01b0\u1eddi kh\u00e1c. K\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng th\u00f4ng tin n\u00e0y \u0111\u1ec3 suy lu\u1eadn c\u00e1c trang web m\u00e0 ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp ho\u1eb7c video m\u00e0 ng\u01b0\u1eddi d\u00f9ng xem.”<\/p>\n\n\n\n
M\u1ed9t \u0111\u1eb7c \u0111i\u1ec3m quan tr\u1ecdng c\u1ee7a ph\u01b0\u01a1ng ph\u00e1p ti\u1ebfp c\u1eadn n\u00e0y l\u00e0 n\u00f3 lo\u1ea1i b\u1ecf s\u1ef1 c\u1ea7n thi\u1ebft ph\u1ea3i th\u1ef1c hi\u1ec7n m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng k\u1ebb x\u00e2m nh\u1eadp gi\u1eefa (AitM) ho\u1eb7c \u1edf g\u1ea7n k\u1ebft n\u1ed1i Wi-Fi \u0111\u1ec3 nghe l\u00e9n l\u01b0u l\u01b0\u1ee3ng m\u1ea1ng.<\/p>\n\n\n\n
C\u1ee5 th\u1ec3, n\u00f3 bao g\u1ed3m vi\u1ec7c l\u1eeba m\u1ed9t m\u1ee5c ti\u00eau t\u1ea3i xu\u1ed1ng m\u1ed9t t\u00e0i s\u1ea3n v\u00f4 h\u1ea1i (v\u00ed d\u1ee5: t\u1ec7p, h\u00ecnh \u1ea3nh ho\u1eb7c qu\u1ea3ng c\u00e1o) t\u1eeb m\u00e1y ch\u1ee7 do k\u1ebb t\u1ea5n c\u00f4ng ki\u1ec3m so\u00e1t, sau \u0111\u00f3 l\u1ee3i d\u1ee5ng \u0111\u1ed9 tr\u1ec5 m\u1ea1ng c\u1ee7a n\u1ea1n nh\u00e2n nh\u01b0 m\u1ed9t k\u00eanh b\u00ean \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c ho\u1ea1t \u0111\u1ed9ng tr\u1ef1c tuy\u1ebfn tr\u00ean h\u1ec7 th\u1ed1ng n\u1ea1n nh\u00e2n.<\/p>\n\n\n\n
\u0110\u1ec3 th\u1ef1c hi\u1ec7n m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng d\u1ea1ng d\u1ea5u v\u00e2n tay nh\u01b0 v\u1eady v\u00e0 thu th\u1eadp th\u00f4ng tin v\u1ec1 video ho\u1eb7c trang web m\u00e0 ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 \u0111ang xem ho\u1eb7c truy c\u1eadp, k\u1ebb t\u1ea5n c\u00f4ng th\u1ef1c hi\u1ec7n m\u1ed9t lo\u1ea1t c\u00e1c ph\u00e9p \u0111o \u0111\u1ed9 tr\u1ec5 c\u1ee7a k\u1ebft n\u1ed1i m\u1ea1ng c\u1ee7a n\u1ea1n nh\u00e2n khi n\u1ed9i dung \u0111ang \u0111\u01b0\u1ee3c t\u1ea3i xu\u1ed1ng t\u1eeb m\u00e1y ch\u1ee7 trong khi h\u1ecd \u0111ang duy\u1ec7t web ho\u1eb7c xem video.<\/p>\n\n\n\n
Sau \u0111\u00f3, qu\u00e1 tr\u00ecnh n\u00e0y li\u00ean quan \u0111\u1ebfn m\u1ed9t giai \u0111o\u1ea1n x\u1eed l\u00fd sau, s\u1eed d\u1ee5ng m\u1ed9t m\u1ea1ng n\u01a1-ron t\u00edch ch\u1eadp (CNN) \u0111\u01b0\u1ee3c \u0111\u00e0o t\u1ea1o v\u1edbi c\u00e1c d\u1ea5u v\u1ebft t\u1eeb m\u1ed9t c\u00e0i \u0111\u1eb7t m\u1ea1ng gi\u1ed1ng nhau \u0111\u1ec3 th\u1ef1c hi\u1ec7n suy lu\u1eadn v\u1edbi \u0111\u1ed9 ch\u00ednh x\u00e1c l\u00ean \u0111\u1ebfn 98% \u0111\u1ed1i v\u1edbi video v\u00e0 63% \u0111\u1ed1i v\u1edbi c\u00e1c trang web.<\/p>\n\n\n\n
N\u00f3i c\u00e1ch kh\u00e1c, do \u0111i\u1ec3m ngh\u1ebdn m\u1ea1ng \u1edf ph\u00eda n\u1ea1n nh\u00e2n, k\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 suy lu\u1eadn l\u01b0\u1ee3ng d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c truy\u1ec1n b\u1eb1ng c\u00e1ch \u0111o th\u1eddi gian tr\u00f2n l\u1ea1i (RTT) c\u1ee7a c\u00e1c g\u00f3i tin. C\u00e1c d\u1ea5u v\u1ebft RTT l\u00e0 duy nh\u1ea5t cho m\u1ed7i video v\u00e0 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ph\u00e2n lo\u1ea1i video \u0111\u01b0\u1ee3c xem b\u1edfi n\u1ea1n nh\u00e2n.<\/p>\n\n\n\n
Cu\u1ed9c t\u1ea5n c\u00f4ng n\u00e0y \u0111\u01b0\u1ee3c \u0111\u1eb7t t\u00ean l\u00e0 “SnailLoad” v\u00ec m\u00e1y ch\u1ee7 t\u1ea5n c\u00f4ng truy\u1ec1n t\u1ec7p v\u1edbi t\u1ed1c \u0111\u1ed9 ch\u1eadm nh\u01b0 con \u1ed1c \u0111\u1ec3 theo d\u00f5i \u0111\u1ed9 tr\u1ec5 k\u1ebft n\u1ed1i trong m\u1ed9t kho\u1ea3ng th\u1eddi gian d\u00e0i.<\/p>\n\n\n\n
“SnailLoad kh\u00f4ng y\u00eau c\u1ea7u JavaScript, kh\u00f4ng c\u00f3 h\u00ecnh th\u1ee9c th\u1ef1c thi m\u00e3 tr\u00ean h\u1ec7 th\u1ed1ng n\u1ea1n nh\u00e2n v\u00e0 kh\u00f4ng c\u1ea7n s\u1ef1 t\u01b0\u01a1ng t\u00e1c c\u1ee7a ng\u01b0\u1eddi d\u00f9ng m\u00e0 ch\u1ec9 c\u1ea7n m\u1ed9t s\u1ef1 trao \u0111\u1ed5i li\u00ean t\u1ee5c c\u00e1c g\u00f3i tin m\u1ea1ng,” c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u gi\u1ea3i th\u00edch, th\u00eam r\u1eb1ng n\u00f3 “\u0111o \u0111\u1ed9 tr\u1ec5 \u0111\u1ebfn h\u1ec7 th\u1ed1ng n\u1ea1n nh\u00e2n v\u00e0 suy lu\u1eadn ho\u1ea1t \u0111\u1ed9ng m\u1ea1ng tr\u00ean h\u1ec7 th\u1ed1ng n\u1ea1n nh\u00e2n t\u1eeb c\u00e1c bi\u1ebfn \u0111\u1ed9ng \u0111\u1ed9 tr\u1ec5.”<\/p>\n\n\n\n
“Nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5 c\u1ee7a k\u00eanh b\u00ean l\u00e0 vi\u1ec7c \u0111\u1ec7m trong m\u1ed9t n\u00fat \u0111\u01b0\u1eddng truy\u1ec1n, th\u01b0\u1eddng l\u00e0 n\u00fat cu\u1ed1i c\u00f9ng tr\u01b0\u1edbc modem ho\u1eb7c b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn c\u1ee7a ng\u01b0\u1eddi d\u00f9ng, li\u00ean quan \u0111\u1ebfn m\u1ed9t v\u1ea5n \u0111\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng d\u1ecbch v\u1ee5 \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 bufferbloat.”<\/p>\n\n\n\n
Vi\u1ec7c c\u00f4ng b\u1ed1 n\u00e0y di\u1ec5n ra khi c\u00e1c h\u1ecdc gi\u1ea3 \u0111\u00e3 ti\u1ebft l\u1ed9 v\u1ec1 m\u1ed9t l\u1ed7 h\u1ed5ng b\u1ea3o m\u1eadt trong c\u00e1ch firmware b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn x\u1eed l\u00fd \u00e1nh x\u1ea1 Network Address Translation (NAT) c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c k\u1ebb t\u1ea5n c\u00f4ng k\u1ebft n\u1ed1i c\u00f9ng m\u1ea1ng Wi-Fi v\u1edbi n\u1ea1n nh\u00e2n khai th\u00e1c \u0111\u1ec3 v\u01b0\u1ee3t qua s\u1ef1 ng\u1eabu nhi\u00ean h\u00f3a \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng s\u1eb5n trong Transmission Control Protocol (TCP).<\/p>\n\n\n\n
“H\u1ea7u h\u1ebft c\u00e1c b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn, v\u00ec l\u00fd do hi\u1ec7u su\u1ea5t, kh\u00f4ng ki\u1ec3m tra nghi\u00eam ng\u1eb7t c\u00e1c s\u1ed1 th\u1ee9 t\u1ef1 c\u1ee7a c\u00e1c g\u00f3i tin TCP,” c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u cho bi\u1ebft. “Do \u0111\u00f3, \u0111i\u1ec1u n\u00e0y \u0111\u01b0a ra c\u00e1c l\u1ed7 h\u1ed5ng b\u1ea3o m\u1eadt nghi\u00eam tr\u1ecdng m\u00e0 k\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 khai th\u00e1c b\u1eb1ng c\u00e1ch t\u1ea1o ra c\u00e1c g\u00f3i tin \u0111\u1eb7t l\u1ea1i (RST) gi\u1ea3 m\u1ea1o \u0111\u1ec3 x\u00f3a c\u00e1c \u00e1nh x\u1ea1 NAT trong b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn m\u1ed9t c\u00e1ch \u0111\u1ed9c h\u1ea1i.”<\/p>\n\n\n\n
Cu\u1ed9c t\u1ea5n c\u00f4ng n\u00e0y \u0111\u01a1n gi\u1ea3n cho ph\u00e9p k\u1ebb t\u1ea5n c\u00f4ng suy lu\u1eadn c\u00e1c c\u1ed5ng ngu\u1ed3n c\u1ee7a c\u00e1c k\u1ebft n\u1ed1i kh\u00e1ch h\u00e0ng kh\u00e1c c\u0169ng nh\u01b0 \u0111\u00e1nh c\u1eafp s\u1ed1 th\u1ee9 t\u1ef1 v\u00e0 s\u1ed1 x\u00e1c nh\u1eadn c\u1ee7a k\u1ebft n\u1ed1i TCP b\u00ecnh th\u01b0\u1eddng gi\u1eefa kh\u00e1ch h\u00e0ng n\u1ea1n nh\u00e2n v\u00e0 m\u00e1y ch\u1ee7 \u0111\u1ec3 th\u1ef1c hi\u1ec7n thao t\u00e1c can thi\u1ec7p k\u1ebft n\u1ed1i TCP.<\/p>\n\n\n\n
C\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng gi\u00e0nh quy\u1ec1n ki\u1ec3m so\u00e1t TCP n\u00e0y sau \u0111\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c v\u0169 kh\u00ed h\u00f3a \u0111\u1ec3 l\u00e0m \u0111\u1ed9c trang web HTTP c\u1ee7a n\u1ea1n nh\u00e2n ho\u1eb7c ti\u1ebfn h\u00e0nh c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng t\u1eeb ch\u1ed1i d\u1ecbch v\u1ee5 (DoS), theo c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u, nh\u1eefng ng\u01b0\u1eddi cho bi\u1ebft c\u00e1c b\u1ea3n v\u00e1 cho l\u1ed7 h\u1ed5ng \u0111ang \u0111\u01b0\u1ee3c c\u1ed9ng \u0111\u1ed3ng OpenWrt v\u00e0 c\u00e1c nh\u00e0 cung c\u1ea5p b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn nh\u01b0 360, Huawei, Linksys, Mercury, TP-Link, Ubiquiti v\u00e0 Xiaomi chu\u1ea9n b\u1ecb.<\/p>\n","protected":false},"excerpt":{"rendered":"
M\u1ed9t nh\u00f3m c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u an ninh t\u1eeb \u0110\u1ea1i h\u1ecdc K\u1ef9 thu\u1eadt Graz v\u1eeba ch\u1ee9ng minh m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng m\u1edbi th\u00f4ng qua k\u00eanh b\u00ean, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 SnailLoad, c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u1eeb xa suy lu\u1eadn v\u1ec1 ho\u1ea1t \u0111\u1ed9ng web c\u1ee7a ng\u01b0\u1eddi d\u00f9ng. “SnailLoad l\u1ee3i d\u1ee5ng m\u1ed9t \u0111i\u1ec3m ngh\u1ebdn hi\u1ec7n c\u00f3 […]<\/p>\n","protected":false},"author":8,"featured_media":19610,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_eb_attr":"","ocean_post_layout":"","ocean_both_sidebars_style":"","ocean_both_sidebars_content_width":0,"ocean_both_sidebars_sidebars_width":0,"ocean_sidebar":"","ocean_second_sidebar":"","ocean_disable_margins":"enable","ocean_add_body_class":"","ocean_shortcode_before_top_bar":"","ocean_shortcode_after_top_bar":"","ocean_shortcode_before_header":"","ocean_shortcode_after_header":"","ocean_has_shortcode":"","ocean_shortcode_after_title":"","ocean_shortcode_before_footer_widgets":"","ocean_shortcode_after_footer_widgets":"","ocean_shortcode_before_footer_bottom":"","ocean_shortcode_after_footer_bottom":"","ocean_display_top_bar":"default","ocean_display_header":"default","ocean_header_style":"","ocean_center_header_left_menu":"","ocean_custom_header_template":"","ocean_custom_logo":0,"ocean_custom_retina_logo":0,"ocean_custom_logo_max_width":0,"ocean_custom_logo_tablet_max_width":0,"ocean_custom_logo_mobile_max_width":0,"ocean_custom_logo_max_height":0,"ocean_custom_logo_tablet_max_height":0,"ocean_custom_logo_mobile_max_height":0,"ocean_header_custom_menu":"","ocean_menu_typo_font_family":"","ocean_menu_typo_font_subset":"","ocean_menu_typo_font_size":0,"ocean_menu_typo_font_size_tablet":0,"ocean_menu_typo_font_size_mobile":0,"ocean_menu_typo_font_size_unit":"px","ocean_menu_typo_font_weight":"","ocean_menu_typo_font_weight_tablet":"","ocean_menu_typo_font_weight_mobile":"","ocean_menu_typo_transform":"","ocean_menu_typo_transform_tablet":"","ocean_menu_typo_transform_mobile":"","ocean_menu_typo_line_height":0,"ocean_menu_typo_line_height_tablet":0,"ocean_menu_typo_line_height_mobile":0,"ocean_menu_typo_line_height_unit":"","ocean_menu_typo_spacing":0,"ocean_menu_typo_spacing_tablet":0,"ocean_menu_typo_spacing_mobile":0,"ocean_menu_typo_spacing_unit":"","ocean_menu_link_color":"","ocean_menu_link_color_hover":"","ocean_menu_link_color_active":"","ocean_menu_link_background":"","ocean_menu_link_hover_background":"","ocean_menu_link_active_background":"","ocean_menu_social_links_bg":"","ocean_menu_social_hover_links_bg":"","ocean_menu_social_links_color":"","ocean_menu_social_hover_links_color":"","ocean_disable_title":"default","ocean_disable_heading":"default","ocean_post_title":"","ocean_post_subheading":"","ocean_post_title_style":"","ocean_post_title_background_color":"","ocean_post_title_background":0,"ocean_post_title_bg_image_position":"","ocean_post_title_bg_image_attachment":"","ocean_post_title_bg_image_repeat":"","ocean_post_title_bg_image_size":"","ocean_post_title_height":0,"ocean_post_title_bg_overlay":0.5,"ocean_post_title_bg_overlay_color":"","ocean_disable_breadcrumbs":"default","ocean_breadcrumbs_color":"","ocean_breadcrumbs_separator_color":"","ocean_breadcrumbs_links_color":"","ocean_breadcrumbs_links_hover_color":"","ocean_display_footer_widgets":"default","ocean_display_footer_bottom":"default","ocean_custom_footer_template":"","ocean_post_oembed":"","ocean_post_self_hosted_media":"","ocean_post_video_embed":"","ocean_link_format":"","ocean_link_format_target":"self","ocean_quote_format":"","ocean_quote_format_link":"post","ocean_gallery_link_images":"on","ocean_gallery_id":[],"footnotes":""},"categories":[80,10],"tags":[291,438,439],"class_list":["post-19480","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-huong-dan-tai-lieu","category-tin-tuc","tag-internet","tag-snailload","tag-wi-fi","entry","has-media"],"_links":{"self":[{"href":"https:\/\/vacif.com\/en\/wp-json\/wp\/v2\/posts\/19480","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vacif.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vacif.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vacif.com\/en\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/vacif.com\/en\/wp-json\/wp\/v2\/comments?post=19480"}],"version-history":[{"count":1,"href":"https:\/\/vacif.com\/en\/wp-json\/wp\/v2\/posts\/19480\/revisions"}],"predecessor-version":[{"id":20105,"href":"https:\/\/vacif.com\/en\/wp-json\/wp\/v2\/posts\/19480\/revisions\/20105"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vacif.com\/en\/wp-json\/wp\/v2\/media\/19610"}],"wp:attachment":[{"href":"https:\/\/vacif.com\/en\/wp-json\/wp\/v2\/media?parent=19480"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vacif.com\/en\/wp-json\/wp\/v2\/categories?post=19480"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vacif.com\/en\/wp-json\/wp\/v2\/tags?post=19480"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}