This was fixed to provide the pre-redirect URL. 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. When a user loaded a Web Extensions context menu, the Web Extension could access the post-redirect URL of the element clicked. #CVE-2021-43531: Web Extensions could access pre-redirect URL when their context menu was triggered by a user Reporter Rob Wu Impact moderate Description #CVE-2021-38508: Permission Prompt could be overlaid, resulting in user confusion and potential spoofing Reporter Raphael Impact moderate Descriptionīy 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. This bug only affects Firefox for Android. #CVE-2021-43530: Universal XSS in Firefox for Android via QR Code URLs Reporter Hafiizh Impact high DescriptionĪ Universal XSS vulnerability was present in Firefox for Android resulting from improper sanitization when processing a URL scanned from a QR code. This was resolved by disabling the Opportunistic Encryption feature, which had low usage. 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. However, if a second encrypted port on the same IP address (e.g. 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. #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 This could lead to spoofing attacks on the browser UI including phishing. Through a series of navigations, Firefox could have entered fullscreen mode without notification or warning to the user. #CVE-2021-38506: Firefox could be coaxed into going into fullscreen mode without notification or warning Reporter Irvan Kurniawan Impact high Description This bug only affects Firefox for Windows 10+ with Cloud Clipboard enabled. This could have caused sensitive data to be recorded to a user's Microsoft account. 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. 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. #CVE-2021-38505: Windows 10 Cloud Clipboard may have recorded sensitive user data Reporter Sergey Galich 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. #CVE-2021-38504: Use-after-free in file picker dialog Reporter Irvan Kurniawan 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. #CVE-2021-38503: iframe sandbox rules did not apply to XSLT stylesheets Reporter Armin Ebert Impact high Description If you have any information regarding this alert, please contact JPCERT/CC.Mozilla Foundation Security Advisory 2021-48 Security Vulnerabilities fixed in Firefox 94 Announced NovemImpact high Products Firefox Fixed in SolutionMozilla has released versions of Firefox that address this vulnerability.It is recommended to update to the latest version after thorough testing. Affected ProductsThe following versions are affected by this vulnerability: Security Vulnerabilities fixed in Firefox 72.0.1 and Firefox ESR 68.4.1 For more information on the vulnerability, please refer to the information provided by Mozilla. According to Mozilla, the vulnerability is already being exploited in the wild. Remote attackers leveraging this vulnerability may be able to execute arbitrary code. This vulnerability is a type confusion vulnerability in IonMonkey JIT compiler. We recommend the users of affected products to apply the solution as soon as possible. OverviewOn Janu(US Time), Mozilla has released information regarding vulnerability (CVE-2019-17026) in Firefox and Firefox ESR.JPCERT/CC confirmed the attacks that exploit this vulnerability have already been conducted in Japan.
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