A Mozilla lançou hoje a versão 94 do seu navegador de internet Firefox, confira as novidades e correções.
Mozilla Firefox
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
Firefox 94
Lançado em 02 de Novembro de 2021 o Firefox 94 chega coma as novidades.
- Com 94, você encontrará uma seleção de seis divertidos Colorways sazonais (disponível por tempo limitado) para customizar as cores do seu Firefox.
- Usar about:unloads para liberar recursos do sistema descarregando guias manualmente sem fechá-las.
- E no Linux, melhorias do desempenho do WebGL com redução de consumo de energia.
- Para proteger melhor todos os usuários do Firefox contra ataques de canal lateral, como Spectre com isolamento de sites.
- O Firefox não avisa mais por padrão quando você sai do navegador ou fecha uma janela usando um menu, botão ou comando de três teclas.
Correções
No quadro abaixo você pode conferir todas as correções de segurança que a versão 94 do Firefox recebeu.
Mozilla Foundation Security Advisory 2021-48
Security Vulnerabilities fixed in Firefox 94
Announced
November 2, 2021
Impact
high
Products
Firefox
Fixed in
Firefox 94
#CVE-2021-38503: iframe sandbox rules did not apply to XSLT stylesheets
Reporter
Armin Ebert
Impact
high
Description
The iframe sandbox rules were not correctly applied to XSLT stylesheets, allowing an iframe to bypass restrictions such as executing scripts or navigating the top-level frame.
References
Bug 1729517
#CVE-2021-38504: Use-after-free in file picker dialog
Reporter
Irvan Kurniawan
Impact
high
Description
When interacting with an HTML input element's file picker dialog with webkitdirectory set, a use-after-free could have resulted, leading to memory corruption and a potentially exploitable crash.
References
Bug 1730156
#CVE-2021-38505: Windows 10 Cloud Clipboard may have recorded sensitive user data
Reporter
Sergey Galich
Impact
high
Description
Microsoft introduced a new feature in Windows 10 known as Cloud Clipboard which, if enabled, will record data copied to the clipboard to the cloud, and make it available on other computers in certain scenarios. Applications that wish to prevent copied data from being recorded in Cloud History must use specific clipboard formats; and Firefox before versions 94 and ESR 91.3 did not implement them. This could have caused sensitive data to be recorded to a user's Microsoft account.
This bug only affects Firefox for Windows 10+ with Cloud Clipboard enabled. Other operating systems are unaffected.
References
Bug 1730194
#CVE-2021-38506: Firefox could be coaxed into going into fullscreen mode without notification or warning
Reporter
Irvan Kurniawan
Impact
high
Description
Through a series of navigations, Firefox could have entered fullscreen mode without notification or warning to the user. This could lead to spoofing attacks on the browser UI including phishing.
References
Bug 1730750
#CVE-2021-38507: Opportunistic Encryption in HTTP2 could be used to bypass the Same-Origin-Policy on services hosted on other ports
Reporter
Takeshi Terada
Impact
high
Description
The Opportunistic Encryption feature of HTTP2 (RFC 8164) allows a connection to be transparently upgraded to TLS while retaining the visual properties of an HTTP connection, including being same-origin with unencrypted connections on port 80. However, if a second encrypted port on the same IP address (e.g. port 8443) did not opt-in to opportunistic encryption; a network attacker could forward a connection from the browser to port 443 to port 8443, causing the browser to treat the content of port 8443 as same-origin with HTTP. This was resolved by disabling the Opportunistic Encryption feature, which had low usage.
References
Bug 1730935
#MOZ-2021-0003: Universal XSS in Firefox for Android via QR Code URLs
Reporter
Hafiizh
Impact
high
Description
A Universal XSS vulnerability was present in Firefox for Android resulting from improper sanitization when processing a URL scanned from a QR code.
This bug only affects Firefox for Android. Other operating systems are unaffected.
Note: This issue is pending a CVE assignment and will be updated when available.
References
Bug 1736886
#CVE-2021-38508: Permission Prompt could be overlaid, resulting in user confusion and potential spoofing
Reporter
Raphael
Impact
moderate
Description
By displaying a form validity message in the correct location at the same time as a permission prompt (such as for geolocation), the validity message could have obscured the prompt, resulting in the user potentially being tricked into granting the permission.
References
Bug 1366818
#MOZ-2021-0004: Web Extensions could access pre-redirect URL when their context menu was triggered by a user
Reporter
Rob Wu
Impact
moderate
Description
When a user loaded a Web Extensions context menu, the Web Extension could access the post-redirect URL of the element clicked. If the Web Extension lacked the WebRequest permission for the hosts involved in the redirect, this would be a same-origin-violation leaking data the Web Extension should have access to. This was fixed to provide the pre-redirect URL. This is related to CVE-XXX but in the context of Web Extensions.
Note: This issue is pending a CVE assignment and will be updated when available.
References
Bug 1659155
#CVE-2021-38509: Javascript alert box could have been spoofed onto an arbitrary domain
Reporter
Ademar Nowasky Junior
Impact
moderate
Description
Due to an unusual sequence of attacker-controlled events, a Javascript alert() dialog with arbitrary (although unstyled) contents could be displayed over top an uncontrolled webpage of the attacker's choosing.
References
Bug 1718571
#CVE-2021-38510: Download Protections were bypassed by .inetloc files on Mac OS
Reporter
houjingyi647
Impact
moderate
Description
The executable file warning was not presented when downloading .inetloc files, which can run commands on a user's computer.
Note: This issue only affected Mac OS operating systems. Other operating systems are unaffected.
References
Bug 1731779
#MOZ-2021-0005: 'Copy Image Link' context menu action could have been abused to see authentication tokens
Reporter
Ademar Nowasky Junior
Impact
low
Description
The 'Copy Image Link' context menu action would copy the final image URL after redirects. By embedding an image that triggered authentication flows - in conjunction with a Content Security Policy that stopped a redirection chain in the middle - the final image URL could be one that contained an authentication token used to takeover a user account. If a website tricked a user into copy and pasting the image link back to the page, the page would be able to steal the authentication tokens. This was fixed by making the action return the original URL, before any redirects.
Note: This issue is pending a CVE assignment and will be updated when available.
References
Bug 1719203
#MOZ-2021-0006: URL Parsing may incorrectly parse internationalized domains
Reporter
Taiga Shirakura
Impact
low
Description
When parsing internationalized domain names, high bits of the characters in the URLs were sometimes stripped, resulting in inconsistencies that could lead to user confusion or attacks such as phishing.
Note: This issue is pending a CVE assignment and will be updated when available.
References
Bug 1724233
#MOZ-2021-0007: Memory safety bugs fixed in Firefox 94 and Firefox ESR 91.3
Reporter
Mozilla developers
Impact
high
Description
Mozilla developers and community members Christian Holler, Valentin Gosu, and Andrew McCreight reported memory safety bugs present in Firefox 93 and Firefox ESR 91.2. 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.
Note: This issue is pending a CVE assignment and will be updated when available.
References
Memory safety bugs fixed in Firefox 94 and Firefox ESR 91.3
Instalação
A instalação sera 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=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&lan=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
Deve ficar como na imagem.
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
Firefox instalado e atualizado.
Fonte
Salve teclando ctrl +x tecle s e tecle Enter para fechar.
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olá, seja bem vindo ao Linux Dicas e suporte !!