{"id":84555,"date":"2020-06-09T01:41:56","date_gmt":"2020-06-08T23:41:56","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-ublock-origin-dobavlena-blokirovka-skriptov-dlya-skanirovaniya-setevyh-portov"},"modified":"2020-06-09T01:41:56","modified_gmt":"2020-06-08T23:41:56","slug":"v-ublock-origin-dobavlena-blokirovka-skriptov-dlya-skanirovaniya-setevyh-portov","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/v-ublock-origin-dobavlena-blokirovka-skriptov-dlya-skanirovaniya-setevyh-portov","title":{"rendered":"O uBlock Origin agora inclui bloqueio de scripts para varredura de portas de rede.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

No filtro usado no uBlock Origin Ap\u00f3s o envio<\/a><\/noindex> foram adicionadas regras para bloquear scripts comuns de varredura de portas de rede no sistema local do usu\u00e1rio. Lembramos que em maio foi identificado<\/a><\/noindex> a varredura de portas locais ao acessar o site eBay.com. Ficou claro que essa pr\u00e1tica n\u00e3o se limita ao eBay, e muitos outros sites<\/a><\/noindex> (Citibank, TD Bank, Sky, GumTree, WePay, etc.) realizam a varredura das portas locais do sistema do usu\u00e1rio ao abrir suas p\u00e1ginas, usando c\u00f3digo para detectar tentativas de acesso de computadores comprometidos, fornecido pelo servi\u00e7o ThreatMetrix.<\/p>\n

No caso do eBay, foram verificadas 14 portas de rede associadas a servidores de acesso remoto, como VNC, TeamViewer, Anyplace Control, Aeroadmin, Ammy Admin e RDP. Provavelmente, a verifica\u00e7\u00e3o \u00e9 realizada para definir<\/a><\/noindex> para detectar vest\u00edgios de infec\u00e7\u00e3o do sistema por malware, a fim de prevenir compras fraudulentas utilizando botnets. A varredura tamb\u00e9m pode ser usada para coletar dados para uma identifica\u00e7\u00e3o indireta do usu\u00e1rio.<\/a><\/noindex>.<\/p>\n

A t\u00e9cnica de varredura baseia-se na tentativa de estabelecer conex\u00f5es a v\u00e1rias portas de rede do host 127.0.0.1 (localhost) atrav\u00e9s de WebSocket<\/a><\/noindex>A presen\u00e7a de uma porta de rede aberta \u00e9 determinada indiretamente com base na diferen\u00e7a no tratamento de erros de conex\u00e3o entre portas de rede ativas e n\u00e3o utilizadas. O WebSocket permite enviar apenas solicita\u00e7\u00f5es HTTP, mas uma solicita\u00e7\u00e3o para uma porta de rede inativa resulta imediatamente em um erro, enquanto para uma porta ativa, o erro ocorre apenas ap\u00f3s algum tempo, devido \u00e0s tentativas de negocia\u00e7\u00e3o da conex\u00e3o. Al\u00e9m disso, no caso de uma porta inativa, o WebSocket retorna um c\u00f3digo de erro de conex\u00e3o (ERR_CONNECTION_REFUSED), e no caso de uma porta ativa, um c\u00f3digo de erro de negocia\u00e7\u00e3o de conex\u00e3o. <\/p>\n

\"O<\/a><\/noindex><\/center><\/p>\n

Al\u00e9m da varredura de portas, WebSockets tamb\u00e9m pode ser usados<\/a><\/noindex> ser usado para ataques a sistemas de desenvolvedores web que executam manipuladores WebSocket localmente para aplicativos React. Um site externo pode percorrer portas de rede, determinar a exist\u00eancia de tal manipulador e se conectar a ele. Se o desenvolvedor cometer um erro, o atacante poder\u00e1 obter o conte\u00fado dos dados de depura\u00e7\u00e3o, que podem incluir fragmentos de informa\u00e7\u00f5es confidenciais.<\/p>\n

\"O<\/a><\/noindex><\/center><\/p>\n

<\/a><\/noindex><\/p>\n

Fonte: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u044b\u0439 \u0432 uBlock Origin \u0444\u0438\u043b\u044c\u0442\u0440 EasyPrivacy \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u044b \u043f\u0440\u0430\u0432\u0438\u043b\u0430 \u0434\u043b\u044f \u0431\u043b\u043e\u043a\u0438\u0440\u043e\u0432\u043a\u0438 \u0442\u0438\u043f\u043e\u0432\u044b\u0445 \u0441\u043a\u0440\u0438\u043f\u0442\u043e\u0432 \u0441\u043a\u0430\u043d\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0441\u0435\u0442\u0435\u0432\u044b\u0445 \u043f\u043e\u0440\u0442\u043e\u0432 \u043d\u0430 \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f. \u041d\u0430\u043f\u043e\u043c\u043d\u0438\u043c, \u0447\u0442\u043e \u0432 \u043c\u0430\u0435 \u0431\u044b\u043b\u043e \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u043e \u0441\u043a\u0430\u043d\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u044b\u0445 \u043f\u043e\u0440\u0442\u043e\u0432 \u043f\u0440\u0438 \u043e\u0442\u043a\u0440\u044b\u0442\u0438\u0438 \u0441\u0430\u0439\u0442\u0430 eBay.com. \u0412\u044b\u044f\u0441\u043d\u0438\u043b\u043e\u0441\u044c, \u0447\u0442\u043e \u043f\u043e\u0434\u043e\u0431\u043d\u0430\u044f \u043f\u0440\u0430\u043a\u0442\u0438\u043a\u0430 \u043d\u0435 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0438\u0432\u0430\u0435\u0442\u0441\u044f eBay \u0438 \u043c\u043d\u043e\u0433\u0438\u0435 \u0434\u0440\u0443\u0433\u0438\u0435 \u0441\u0430\u0439\u0442\u044b (Citibank, TD Bank, Sky, GumTree, WePay \u0438 \u0442.\u043f.) \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u044e\u0442 \u0441\u043a\u0430\u043d\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u043f\u043e\u0440\u0442\u043e\u0432 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":84556,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-84555","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47O uBlock Origin adicionou a possibilidade de bloquear scripts para a verifica\u00e7\u00e3o de portas de rede | ProHoster","description":"No filtro EasyPrivacy usado no uBlock Origin, foram adicionadas regras para bloquear scripts 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