O Firefox chega a sua versão 107, confira as novidades e correções de segurança.

Lançado o browser Firefox 107

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 anúncio foi feito em 16 de Novembro de 2022.

"Versão 107.0, oferecida pela primeira vez aos usuários do canal de lançamento em 15 de novembro de 2022"

Esse lançamento recebe os destaques.

• Melhorou o desempenho da instância quando o IME e o Defender da Microsoft recuperam a URL de um documento focado no Windows 11 versão 22H2.
• A criação de perfis de energia - visualização de dados de desempenho gravados em navegadores da Web - agora também é compatível com Linux e Mac com CPUs Intel, além do Windows 11 e Apple Silicon.

Varias correções de segurança.

Mozilla Foundation Security Advisory 2022-47 Security Vulnerabilities fixed in Firefox 107 Announced November 15, 2022 Impact high Products Firefox Fixed in Firefox 107 #CVE-2022-45403: Service Workers might have learned size of cross-origin media files Reporter Anne van Kesteren and Karl Tomlinson Impact high Description Service Workers should not be able to infer information about opaque cross-origin responses; but timing information for cross-origin media combined with Range requests might have allowed them to determine the presence or length of a media file. References Bug 1762078 #CVE-2022-45404: Fullscreen notification bypass Reporter Irvan Kurniawan Impact high Description Through a series of popup and window.print() calls, an attacker can cause a window to go fullscreen without the user seeing the notification prompt, resulting in potential user confusion or spoofing attacks. References Bug 1790815 #CVE-2022-45405: Use-after-free in InputStream implementation Reporter Atte Kettunen Impact high Description Freeing arbitrary nsIInputStream's on a different thread than creation could have led to a use-after-free and potentially exploitable crash. References Bug 1791314 #CVE-2022-45406: Use-after-free of a JavaScript Realm Reporter Samuel Groß Impact high Description If an out-of-memory condition occurred when creating a JavaScript global, a JavaScript realm may be deleted while references to it lived on in a BaseShape. This could lead to a use-after-free causing a potentially exploitable crash. References Bug 1791975 #CVE-2022-45407: Loading fonts on workers was not thread-safe Reporter Armin Ebert Impact high Description If an attacker loaded a font using FontFace() on a background worker, a use-after-free could have occurred, leading to a potentially exploitable crash. References Bug 1793314 #CVE-2022-45408: Fullscreen notification bypass via windowName Reporter Irvan Kurniawan Impact high Description Through a series of popups that reuse windowName, an attacker can cause a window to go fullscreen without the user seeing the notification prompt, resulting in potential user confusion or spoofing attacks. References Bug 1793829 #CVE-2022-45409: Use-after-free in Garbage Collection Reporter Gary Kwong Impact high Description The garbage collector could have been aborted in several states and zones and GCRuntime::finishCollection may not have been called, leading to a use-after-free and potentially exploitable crash References Bug 1796901 #CVE-2022-45410: ServiceWorker-intercepted requests bypassed SameSite cookie policy Reporter Dongsung Kim Impact moderate Description When a ServiceWorker intercepted a request with FetchEvent, the origin of the request was lost after the ServiceWorker took ownership of it. This had the effect of negating SameSite cookie protections. This was addressed in the spec and then in browsers. References Bug 1658869 #CVE-2022-45411: Cross-Site Tracing was possible via non-standard override headers Reporter scarlet Impact moderate Description Cross-Site Tracing occurs when a server will echo a request back via the Trace method, allowing an XSS attack to access to authorization headers and cookies inaccessible to JavaScript (such as cookies protected by HTTPOnly). To mitigate this attack, browsers placed limits on fetch() and XMLHttpRequest; however some webservers have implemented non-standard headers such as X-Http-Method-Override that override the HTTP method, and made this attack possible again. Firefox has applied the same mitigations to the use of this and similar headers. References Bug 1790311 #CVE-2022-45412: Symlinks may resolve to partially uninitialized buffers Reporter Armin Ebert Impact moderate Description When resolving a symlink such as file:///proc/self/fd/1, an error message may be produced where the symlink was resolved to a string containing unitialized memory in the buffer. This bug only affects Firefox on Unix-based operated systems (Android, Linux, MacOS). Windows is unaffected. References Bug 1791029 #CVE-2022-45413: SameSite=Strict cookies could have been sent cross-site via intent URLs Reporter Axel Chong Impact moderate Description Using the S.browser_fallback_url parameter parameter, an attacker could redirect a user to a URL and cause SameSite=Strict cookies to be sent. This issue only affects Firefox for Android. Other operating systems are not affected. References Bug 1791201 #CVE-2022-40674: Use-after-free vulnerability in expat Reporter Rhodri James Impact moderate Description A flaw in XML parsing could have led to a use-after-free causing a potentially exploitable crash. In official releases of Firefox this vulnerability is mitigated by wasm sandboxing; versions managed by Linux distributions may have other settings. References Bug 1791598 #CVE-2022-45415: Downloaded file may have been saved with malicious extension Reporter Jefferson Scher and Jayateertha Guruprasad Impact moderate Description When downloading an HTML file, if the title of the page was formatted as a filename with a malicious extension, Firefox may have saved the file with that extension, leading to possible system compromise if the downloaded file was later ran. References Bug 1793551 #CVE-2022-45416: Keystroke Side-Channel Leakage Reporter Erik Kraft, Martin Schwarzl, and Andrew McCreight Impact moderate Description Keyboard events reference strings like "KeyA" that were at fixed, known, and widely-spread addresses. Cache-based timing attacks such as Prime+Probe could have possibly figured out which keys were being pressed. References Bug 1793676 #CVE-2022-45417: Service Workers in Private Browsing Mode may have been written to disk Reporter Kagami Impact moderate Description Service Workers did not detect Private Browsing Mode correctly in all cases, which could have led to Service Workers being written to disk for websites visited in Private Browsing Mode. This would not have persisted them in a state where they would run again, but it would have leaked Private Browsing Mode details to disk. References Bug 1794508 #CVE-2022-45418: Custom mouse cursor could have been drawn over browser UI Reporter Hafiizh Impact moderate Description If a custom mouse cursor is specified in CSS, under certain circumstances the cursor could have been drawn over the browser UI, resulting in potential user confusion or spoofing attacks. References Bug 1795815 #CVE-2022-45419: Deleting a security exception did not take effect immediately Reporter Ronald Crane Impact low Description If the user added a security exception for an invalid TLS certificate, opened an ongoing TLS connection with a server that used that certificate, and then deleted the exception, Firefox would have kept the connection alive, making it seem like the certificate was still trusted. References Bug 1716082 #CVE-2022-45420: Iframe contents could be rendered outside the iframe Reporter Suhwan Song of SNU CompSec Lab Impact low Description Using tables inside of an iframe, an attacker could have caused iframe contents to be rendered outside the boundaries of the iframe, resulting in potential user confusion or spoofing attacks. References Bug 1792643 #CVE-2022-45421: Memory safety bugs fixed in Firefox 107 and Firefox ESR 102.5 Reporter Mozilla developers Impact high Description Mozilla developers Andrew McCreight and Gabriele Svelto reported memory safety bugs present in Firefox 106 and Firefox ESR 102.4. 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 107 and Firefox ESR 102.5

 

O Firefox DevTools também recebeu melhorias.

• Você está usando a ferramenta de linha de comando webext para executar e testar sua extensão da web? Há um novo argumento que permite que você também abra automaticamente o DevTools caso queira - por exemplo, inspecionar a interface do usuário (bug).
• $ webext run --devtools
• Nota: o pacote web-ext npm precisa ser >= 7.3.0
• Agora também é simples inspecionar janelas pop-up (implementadas pelo WebExtension) usando DevTools (bug).
• Ao fazer alterações no código-fonte do seu WebExtension, você pode recarregá-lo facilmente usando um botão “Recarregar” na caixa de ferramentas do DevTools para ver as alterações (bug).

 

 Fonte

 

Instalação

.
A instalação será feita usando o Firefox dos servidores da Mozilla e instalado no diretório /opt.
Abra o terminal e de os comandos na sequencia.
Entre no diretório de trabalho.

cd /opt

De o comando abaixo para fazer o download da ultima versão do Firefox, escolha a sua plataforma e linguagem.

Firefox i686 ( 32 bits ) PT_BR

sudo wget -O firefox.tar.bz2 "https://download.mozilla.org/?product=firefox-latest&os=linux&lang=lang=pt-BR"

Ou
Firefox i686 ( 32 bits ) EN_US

sudo wget -O firefox.tar.bz2 "https://download.mozilla.org/?product=firefox-latest&os=linux&lang=en-US"

Ou
Firefox amd64 ( 64 bits ) PT_BR

sudo wget -O firefox.tar.bz2 "https://download.mozilla.org/?product=firefox-latest&os=linux64&lang=pt-BR"

Ou
Firefox amd64 ( 64 bits ) EN_US

sudo wget -O firefox.tar.bz2 "https://download.mozilla.org/?product=firefox-latest&os=linux64&lang=en-US"

Descompacte o arquivo do download.

sudo tar -jxvf /opt/firefox.tar.bz2

Vamos criar o atalho no menu, de o comando abaixo no terminal.

sudo nano /usr/share/applications/Firefox.desktop

Copie as linhas abaixo em vermelho no arquivo aberto,salve e feche.

[Desktop Entry]
Encoding=UTF-8
Name=Firefox
Comment=Browse the World Wide Web
GenericName=Web Browser
X-GNOME-FullName=Firefox Web Browser
Exec=/opt/firefox/firefox %u
Terminal=false
X-MultipleArgs=false
Type=Application
Icon=/opt/firefox/browser/chrome/icons/default/default48.png
Categories=Network;WebBrowser;
MimeType=text/html;text/xml;application/xhtml+xml;application/xml;application/vnd.mozilla.xul+xml;application/rss+xml;application/rdf+xml;image/gif;image/jpeg;image/png;x-scheme-handler/http;x-scheme-handler/https;
StartupWMClass=Firefox
StartupNotify=true

Salve teclando CTRL + x tecle s e tecle Enter para fechar. 

Para finalizar vamos tornar o seu usuário dono do diretório do Firefox, com isso o Firefox ira atualizar automaticamente quando a Mozilla liberar atualizações.

sudo chown -R $USER:$USER /opt/firefox

Vá ao menu e abra o Firefox.