Lançado o navegador Mozilla Firefox 83 para Linux

O navegador Mozilla Firefox 83 está chegando com  novidades e varias correções de segurança, confira.

Mozilla Firefox 83

 

Mozilla Firefox é um navegador livre e multiplataforma desenvolvido pela Mozilla Foundation com ajuda de centenas de colaboradores. A intenção da fundação é desenvolver um navegador leve, seguro, intuitivo e altamente extensível. Wikipédia

 

O Mozilla Firefox 83 foi anunciado em 17 de novembro de 2020.

"O Firefox fica cada vez mais rápido como resultado de atualizações significativas no SpiderMonkey, nosso mecanismo JavaScript, agora você experimentar um desempenho de carregamento de página aprimorado em até 15%, a capacidade de resposta da página em até 12% e o uso de memória reduzido em até 8%. Substituímos parte do mecanismo JavaScript que ajuda a compilar e exibir sites para você, melhorando a segurança e a capacidade de manutenção do mecanismo ao mesmo tempo."

Correções

• Recursos de leitor de tela que relatam parágrafos agora relatam parágrafos corretamente em vez de linhas no Google Docs.
• Ao ler por palavra usando um leitor de tela, as palavras agora são relatadas corretamente quando há pontuação por perto.
• As teclas de seta agora funcionam corretamente após tabulação na janela picture-in-picture.

Correções de segurança podem ser conferidas no quadro abaixo.

Security Vulnerabilities fixed in Firefox 83 Announced November 17, 2020 Impact high Products Firefox Fixed in Firefox 83 #CVE-2020-26951: Parsing mismatches could confuse and bypass security sanitizer for chrome privileged code Reporter Irvan Kurniawan (@sourc7) Impact high Description A parsing and event loading mismatch in Firefox's SVG code could have allowed load events to fire, even after sanitization. An attacker already capable of exploiting an XSS vulnerability in privileged internal pages could have used this attack to bypass our built-in sanitizer. References Bug 1667113 #CVE-2020-26952: Out of memory handling of JITed, inlined functions could lead to a memory corruption Reporter Gary Kwong Impact high Description Incorrect bookkeeping of functions inlined during JIT compilation could have led to memory corruption and a potentially exploitable crash when handling out-of-memory errors. References Bug 1667685 #CVE-2020-16012: Variable time processing of cross-origin images during drawImage calls Reporter Aleksejs Popovs Impact moderate Description When drawing a transparent image on top of an unknown cross-origin image, the Skia library drawImage function took a variable amount of time depending on the content of the underlying image. This resulted in potential cross-origin information exposure of image content through timing side-channel attacks. References Bug 1642028 #CVE-2020-26953: Fullscreen could be enabled without displaying the security UI Reporter Abdulrahman Alqabandi of Microsoft Browser Vulnerability Research Impact moderate Description It was possible to cause the browser to enter fullscreen mode without displaying the security UI; thus making it possible to attempt a phishing attack or otherwise confuse the user. References Bug 1656741 #CVE-2020-26954: Local spoofing of web manifests for arbitrary pages in Firefox for Android Reporter Muneaki Nishimura Impact moderate Description When accepting a malicious intent from other installed apps, Firefox for Android accepted manifests from arbitrary file paths and allowed declaring webapp manifests for other origins. This could be used to gain fullscreen access for UI spoofing and could also lead to cross-origin attacks on targeted websites. Note: This issue only affected Firefox for Android. Other operating systems are unaffected. References Bug 1657026 #CVE-2020-26955: Cookies set during file downloads are shared between normal and Private Browsing Mode in Firefox for Android Reporter Muneaki Nishimura Impact moderate Description When a user downloaded a file in Firefox for Android, if a cookie is set, it would have been re-sent during a subsequent file download operation on the same domain, regardless of whether the original and subsequent request were in private and non-private browsing modes. Note: This issue only affected Firefox for Android. Other operating systems are unaffected. References Bug 1663261 #CVE-2020-26956: XSS through paste (manual and clipboard API) Reporter Irvan Kurniawan (@sourc7) Impact moderate Description In some cases, removing HTML elements during sanitization would keep existing SVG event handlers and therefore lead to XSS. References Bug 1666300 #CVE-2020-26957: OneCRL was not working in Firefox for Android Reporter Kevin Brosnan Impact moderate Description OneCRL was non-functional in the new Firefox for Android due to a missing service initialization. This could result in a failure to enforce some certificate revocations. Note: This issue only affected Firefox for Android. Other operating systems are unaffected. References Bug 1667179 #CVE-2020-26958: Requests intercepted through ServiceWorkers lacked MIME type restrictions Reporter Moti Harmats Impact moderate Description Firefox did not block execution of scripts with incorrect MIME types when the response was intercepted and cached through a ServiceWorker. This could lead to a cross-site script inclusion vulnerability, or a Content Security Policy bypass. References Bug 1669355 #CVE-2020-26959: Use-after-free in WebRequestService Reporter Bharadwaj Machiraju Impact moderate Description During browser shutdown, reference decrementing could have occured on a previously freed object, resulting in a use-after-free, memory corruption, and a potentially exploitable crash. References Bug 1669466 #CVE-2020-26960: Potential use-after-free in uses of nsTArray Reporter Zijie Zhao Impact moderate Description If the Compact() method was called on an nsTArray, the array could have been reallocated without updating other pointers, leading to a potential use-after-free and exploitable crash. References Bug 1670358 #CVE-2020-15999: Heap buffer overflow in freetype Reporter Sergei Glazunov of Google Project Zero Impact moderate Description In Freetype, if PNG images were embedded into fonts, the Load_SBit_Png function contained an integer overflow that led to a heap buffer overflow, memory corruption, and an exploitable crash. Note: While Project Zero did discover instances of this vulnerability being exploited in the wild against Chrome, in Firefox this vulnerability is only triggerable if a rarely-used, hidden preference is toggled, and only affected Linux and Android operating systems. Other operating systems are unaffected; and Linux and Android are unaffected in the default configuration. References Bug 1672223 #CVE-2020-26961: DoH did not filter IPv4 mapped IP Addresses Reporter Gabriel Corona Impact moderate Description When DNS over HTTPS is in use, it intentionally filters RFC1918 and related IP ranges from the responses as these do not make sense coming from a DoH resolver. However when an IPv4 address was mapped through IPv6, these addresses were erroneously let through, leading to a potential DNS Rebinding attack. References Bug 1672528 #CVE-2020-26962: Cross-origin iframes supported login autofill Reporter Paul Stone Impact low Description Cross-origin iframes that contained a login form could have been recognized by the login autofill service, and populated. This could have been used in clickjacking attacks, as well as be read across partitions in dynamic first party isolation. References Bug 610997 #CVE-2020-26963: History and Location interfaces could have been used to hang the browser Reporter Sachin Raste Impact low Description Repeated calls to the history and location interfaces could have been used to hang the browser. This was addressed by introducing rate-limiting to these API calls. References Bug 1314912 #CVE-2020-26964: Firefox for Android's Remote Debugging via USB could have been abused by untrusted apps on older versions of Android Reporter Muneaki Nishimura Impact low Description If the Remote Debugging via USB feature was enabled in Firefox for Android on an Android version prior to Android 6.0, untrusted apps could have connected to the feature and operated with the privileges of the browser to read and interact with web content. The feature was implemented as a unix domain socket, protected by the Android SELinux policy; however, SELinux was not enforced for versions prior to 6.0. This was fixed by removing the Remote Debugging via USB feature from affected devices. Note: This issue only affected Firefox for Android. Other operating systems are unaffected. References Bug 1658865 #CVE-2020-26965: Software keyboards may have remembered typed passwords Reporter Makoto Kato Impact low Description Some websites have a feature "Show Password" where clicking a button will change a password field into a textbook field, revealing the typed password. If, when using a software keyboard that remembers user input, a user typed their password and used that feature, the type of the password field was changed, resulting in a keyboard layout change and the possibility for the software keyboard to remember the typed password. References Bug 1661617 #CVE-2020-26966: Single-word search queries were also broadcast to local network Reporter tiebuchen Impact low Description Searching for a single word from the address bar caused an mDNS request to be sent on the local network searching for a hostname consisting of that string; resulting in an information leak. Note: This issue only affected Windows operating systems. Other operating systems are unaffected. References Bug 1663571 #CVE-2020-26967: Mutation Observers could break or confuse Firefox Screenshots feature Reporter Kaizer Soze Impact low Description When listening for page changes with a Mutation Observer, a malicious web page could confuse Firefox Screenshots into interacting with elements other than those that it injected into the page. This would lead to internal errors and unexpected behavior in the Screenshots code. References Bug 1665820 #CVE-2020-26968: Memory safety bugs fixed in Firefox 83 and Firefox ESR 78.5 Reporter Mozilla developers and community Impact high Description Mozilla developers Randell Jesup, Christian Holler, Jason Kratzer, Byron Campen, and Steve Fink reported memory safety bugs present in Firefox 82 and Firefox ESR 78.4. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. References Memory safety bugs fixed in Firefox 83 and Firefox ESR 78.5 #CVE-2020-26969: Memory safety bugs fixed in Firefox 83 Reporter Mozilla developers and community Impact high Description Mozilla developers Tyson Smith, Aaron Klotz, David Major and Jason Kratzer reported memory safety bugs present in Firefox 82. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. References Memory safety bugs fixed in Firefox 83  

 

Novidades

O Firefox apresenta o modo HTTPS apenas. Quando ativado, este novo modo garante que todas as conexões que o Firefox faz com a web sejam seguras e alerta você quando uma conexão segura não está disponível. Você pode habilitá-lo nas Preferências do Firefox > Privacidade e Segurança.

O zoom de pinça agora será compatível com nossos usuários com dispositivos Windows touchscreen e touchpads em dispositivos Mac. Os usuários do Firefox agora podem usar o gesto de pinça para aumentar o zoom em dispositivos sensíveis ao toque para aumentar e diminuir o zoom de páginas da web.

Picture-in-Picture agora suporta atalhos de teclado para avançar e retroceder vídeos: use as teclas de seta para avançar e voltar 15 segundos, junto com os controles de volume. Para obter uma lista de comandos suportados, consulte Suporte Mozilla

Ao apresentar sua tela em uma videoconferência no Firefox, você verá nossa interface de usuário aprimorada que torna mais claro quais dispositivos ou monitores estão sendo compartilhados.

Melhoramos a funcionalidade e o design de vários recursos de pesquisa do Firefox:

Selecionar um mecanismo de pesquisa na parte inferior do painel de pesquisa agora entra no modo de pesquisa para esse mecanismo, permitindo que você veja sugestões (se disponíveis) para seus termos de pesquisa. O comportamento antigo (realizar uma pesquisa imediatamente) está disponível com um clique de shift.
Quando o Firefox autocompleta a URL de um de seus mecanismos de pesquisa, agora você pode pesquisar com esse mecanismo diretamente na barra de endereço, selecionando o atalho nos resultados da barra de endereço.
Adicionamos botões na parte inferior do painel de pesquisa para permitir que você pesquise seus favoritos, guias abertas e histórico.

O Firefox suporta AcroForm, o que permite que você preencha, imprima e salve formulários PDF suportados e o visualizador de PDF também tem um novo visual.

Fonte e mais detalhes

Instalação

Para ter a nova versão aguarde a chegada em seus repositórios, caso queira ter o Mozilla Firefox sempre atualizado pelo desenvolvedor em seu sistema operacional Linux, confira nossa matéria.

Instalar Firefox sempre atualizado na sua distribuição GNU/Linux

O Debian vem com o Firefox-ESR instalado e só tem essa versão no repositório Stable, se você prefere o Firefox mais atual da Mozilla confira essa matéria.
O método pode ser usado em qualquer distribuição GNU/Linux.

Ai está o Firefox 83.