{"id":112965,"date":"2024-01-17T23:28:01","date_gmt":"2024-01-17T21:28:01","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/pixiefail-uyazvimosti-v-setevom-steke-proshivok-uefi-primenyaemom-dlya-pxe-zagruzki"},"modified":"2024-01-17T23:28:01","modified_gmt":"2024-01-17T21:28:01","slug":"pixiefail-uyazvimosti-v-setevom-steke-proshivok-uefi-primenyaemom-dlya-pxe-zagruzki","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/pixiefail-uyazvimosti-v-setevom-steke-proshivok-uefi-primenyaemom-dlya-pxe-zagruzki","title":{"rendered":"PixieFAIL \u2014 vulnerabilidades na pilha de rede de firmwares UEFI, utilizada para inicializa\u00e7\u00e3o PXE.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Em firmwares UEFI baseados na plataforma aberta TianoCore EDK2, frequentemente utilizados em sistemas de servidores, foram identificadas 9 vulnerabilidades com o nome de c\u00f3digo coletivo PixieFAIL. As vulnerabilidades est\u00e3o presentes na pilha de rede dos firmwares, utilizada para a inicializa\u00e7\u00e3o de rede (PXE). As vulnerabilidades mais graves permitem que um atacante n\u00e3o autenticado execute remotamente seu c\u00f3digo no n\u00edvel do firmware em sistemas que permitem a inicializa\u00e7\u00e3o PXE utilizando a rede IPv6.     <\/p>\n<p>Problemas menos graves podem resultar em nega\u00e7\u00e3o de servi\u00e7o (bloqueio da inicializa\u00e7\u00e3o), vazamento de informa\u00e7\u00f5es, envenenamento de cache DNS e intercepta\u00e7\u00e3o de sess\u00f5es TCP. A maioria das vulnerabilidades pode ser explorada a partir da rede local, mas algumas permitem ataque a partir de redes externas. Um cen\u00e1rio t\u00edpico de ataque envolve monitorar o tr\u00e1fego na rede local e enviar pacotes especialmente formatados ao detectar atividade relacionada \u00e0 inicializa\u00e7\u00e3o do sistema via PXE. O acesso \u00e0 <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/pt\/server\/dts-shicago\/\"   title=\"servidor\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2874\">servidor<\/a> inicializa\u00e7\u00e3o ou ao servidor DHCP n\u00e3o \u00e9 necess\u00e1rio. Prot\u00f3tipos de exploits foram publicados para demonstrar a t\u00e9cnica de ataque.       <\/p>\n<p>Firmwares UEFI baseados na plataforma TianoCore EDK2 s\u00e3o utilizados em muitas grandes empresas, provedores de nuvem, data centers e clusters computacionais. Especificamente, o m\u00f3dulo vulner\u00e1vel NetworkPkg, que implementa a inicializa\u00e7\u00e3o PXE, \u00e9 utilizado em firmwares desenvolvidos por empresas como ARM, Insyde Software (Insyde H20 UEFI BIOS), American Megatrends (AMI Aptio OpenEdition), Phoenix Technologies (SecureCore), Intel, Dell e Microsoft (Project Mu). Acreditava-se que as vulnerabilidades tamb\u00e9m afetavam a plataforma ChromeOS, pois existe um pacote EDK2 em seu reposit\u00f3rio, mas a empresa Google declarou que esse pacote n\u00e3o \u00e9 utilizado em firmwares para dispositivos Chromebook e que a plataforma ChromeOS n\u00e3o est\u00e1 sujeita a esse problema.        <\/p>\n<p>Vulnerabilidades identificadas:  <\/p>\n<ul>\n<li class=\"l\"> CVE-2023-45230 \u2014 estouro de buffer no c\u00f3digo do cliente DHCPv6, explorado atrav\u00e9s da transmiss\u00e3o de um identificador excessivamente longo <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/pt\/server\/dts-los-angeles\/\"   title=\"servidor\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3612\">servidor<\/a> (op\u00e7\u00e3o Server ID).\n<li class=\"l\"> CVE-2023-45234 \u2014 estouro de buffer ao processar a op\u00e7\u00e3o com par\u00e2metros de servidor DNS, transmitidos na mensagem que anuncia a presen\u00e7a do servidor DHCPv6.\n<li class=\"l\"> CVE-2023-45235 \u2014 estouro de buffer ao processar a op\u00e7\u00e3o com o identificador do servidor (Server ID) em mensagens de an\u00fancio de proxy para DHCPv6.\n<li class=\"l\"> CVE-2023-45229 \u2014 estouro inteiro pela borda inferior (underflow), manifestando-se ao processar op\u00e7\u00f5es IA_NA\/IA_TA em mensagens DHCPv6 que anunciam o servidor DHCP.\n<li class=\"l\"> CVE-2023-45231 \u2014 vazamento de dados da \u00e1rea fora do buffer ao processar mensagens ND Redirect (Descoberta de Vizinhos) com valores de op\u00e7\u00f5es truncados.\n<li class=\"l\"> CVE-2023-45232 \u2014 loop infinito ao analisar op\u00e7\u00f5es desconhecidas no cabe\u00e7alho com par\u00e2metros de op\u00e7\u00f5es de destino (Destination Options).\n<li class=\"l\"> CVE-2023-45233 \u2014 loop infinito ao analisar a op\u00e7\u00e3o PadN no cabe\u00e7alho do pacote.\n<li class=\"l\"> CVE-2023-45236 \u2014 uso de n\u00fameros de sequ\u00eancia TCP iniciais previs\u00edveis, permitindo a inser\u00e7\u00e3o em uma conex\u00e3o TCP.\n<li class=\"l\"> CVE-2023-45237 \u2014 uso de um gerador de n\u00fameros pseudoaleat\u00f3rios n\u00e3o confi\u00e1vel, que gera valores previs\u00edveis.  <\/ul>\n<p>As informa\u00e7\u00f5es sobre as vulnerabilidades foram enviadas ao CERT\/CC em 3 de agosto de 2023, e a data de divulga\u00e7\u00e3o estava marcada para 2 de novembro. No entanto, devido \u00e0 necessidade de um lan\u00e7amento coordenado de corre\u00e7\u00f5es, abrangendo muitos fabricantes, a data de publica\u00e7\u00e3o foi adiada inicialmente para 1 de dezembro, depois para 12 de dezembro e 19 de dezembro de 2023, mas, em \u00faltima inst\u00e2ncia, foi divulgada em 16 de janeiro de 2024. A Microsoft pediu que a divulga\u00e7\u00e3o das informa\u00e7\u00f5es fosse adiada at\u00e9 maio.<br \/>\n<br \/>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=60449\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 UEFI-\u043f\u0440\u043e\u0448\u0438\u0432\u043a\u0430\u0445 \u043d\u0430 \u043e\u0441\u043d\u043e\u0432\u0435 \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u0439 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b TianoCore EDK2, \u043e\u0431\u044b\u0447\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u043c\u044b\u0445 \u043d\u0430 \u0441\u0435\u0440\u0432\u0435\u0440\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u043e 9 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439, \u043f\u043e\u043b\u0443\u0447\u0438\u0432\u0448\u0438\u0445 \u0441\u043e\u0431\u0438\u0440\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0435 \u043a\u043e\u0434\u043e\u0432\u043e\u0435 \u0438\u043c\u044f PixieFAIL. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043f\u0440\u0438\u0441\u0443\u0442\u0441\u0442\u0432\u0443\u044e\u0442 \u0432 \u0441\u0435\u0442\u0435\u0432\u043e\u043c \u0441\u0442\u0435\u043a\u0435 \u043f\u0440\u043e\u0448\u0438\u0432\u043e\u043a, \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u043e\u043c \u0434\u043b\u044f \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u0441\u0435\u0442\u0435\u0432\u043e\u0439 \u0437\u0430\u0433\u0440\u0443\u0437\u043a\u0438 (PXE). \u041d\u0430\u0438\u0431\u043e\u043b\u0435\u0435 \u043e\u043f\u0430\u0441\u043d\u044b\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0442 \u043d\u0435\u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u0446\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u043c\u0443 \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0435\u043c\u0443 \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u043e\u0432\u0430\u0442\u044c \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e\u0435 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u0441\u0432\u043e\u0435\u0433\u043e \u043a\u043e\u0434\u0430 \u043d\u0430 \u0443\u0440\u043e\u0432\u043d\u0435 \u043f\u0440\u043e\u0448\u0438\u0432\u043a\u0438 \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445, \u0434\u043e\u043f\u0443\u0441\u043a\u0430\u044e\u0449\u0438\u0445 PXE-\u0437\u0430\u0433\u0440\u0443\u0437\u043a\u0443 \u0441 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435\u043c \u0441\u0435\u0442\u0438 IPv6. [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-112965","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0412 UEFI-\u043f\u0440\u043e\u0448\u0438\u0432\u043a\u0430\u0445 \u043d\u0430 \u043e\u0441\u043d\u043e\u0432\u0435 \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u0439 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b TianoCore EDK2, \u043e\u0431\u044b\u0447\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u043c\u044b\u0445 \u043d\u0430 \u0441\u0435\u0440\u0432\u0435\u0440\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u043e 9 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439, \u043f\u043e\u043b\u0443\u0447\u0438\u0432\u0448\u0438\u0445 \u0441\u043e\u0431\u0438\u0440\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0435 \u043a\u043e\u0434\u043e\u0432\u043e\u0435 \u0438\u043c\u044f PixieFAIL.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/pt\/blog\/news\/pixiefail-uyazvimosti-v-setevom-steke-proshivok-uefi-primenyaemom-dlya-pxe-zagruzki\" \/>\n\t\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.3\" \/>\n\t\t<meta property=\"og:locale\" content=\"pt_PT\" \/>\n\t\t<meta property=\"og:site_name\" content=\"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"\ud83e\udd47PixieFAIL \u2014 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0432 \u0441\u0435\u0442\u0435\u0432\u043e\u043c \u0441\u0442\u0435\u043a\u0435 \u043f\u0440\u043e\u0448\u0438\u0432\u043e\u043a UEFI, \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u043e\u043c \u0434\u043b\u044f PXE-\u0437\u0430\u0433\u0440\u0443\u0437\u043a\u0438 | ProHoster\" \/>\n\t\t<meta property=\"og:description\" content=\"\u0412 UEFI-\u043f\u0440\u043e\u0448\u0438\u0432\u043a\u0430\u0445 \u043d\u0430 \u043e\u0441\u043d\u043e\u0432\u0435 \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u0439 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b TianoCore EDK2, \u043e\u0431\u044b\u0447\u043d\u043e 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PixieFAIL.","canonical_url":"https:\/\/prohoster.info\/pt\/blog\/news\/pixiefail-uyazvimosti-v-setevom-steke-proshivok-uefi-primenyaemom-dlya-pxe-zagruzki","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"pt_PT","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47PixieFAIL \u2014 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0432 \u0441\u0435\u0442\u0435\u0432\u043e\u043c \u0441\u0442\u0435\u043a\u0435 \u043f\u0440\u043e\u0448\u0438\u0432\u043e\u043a UEFI, \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u043e\u043c \u0434\u043b\u044f PXE-\u0437\u0430\u0433\u0440\u0443\u0437\u043a\u0438 | ProHoster","og:description":"\u0412 UEFI-\u043f\u0440\u043e\u0448\u0438\u0432\u043a\u0430\u0445 \u043d\u0430 \u043e\u0441\u043d\u043e\u0432\u0435 \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u0439 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b TianoCore EDK2, \u043e\u0431\u044b\u0447\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u043c\u044b\u0445 \u043d\u0430 \u0441\u0435\u0440\u0432\u0435\u0440\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u043e 9 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439, \u043f\u043e\u043b\u0443\u0447\u0438\u0432\u0448\u0438\u0445 \u0441\u043e\u0431\u0438\u0440\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0435 \u043a\u043e\u0434\u043e\u0432\u043e\u0435 \u0438\u043c\u044f 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