Memory safety bugs fixed in Firefox 79 and Firefox ESR 78. 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. Mozilla developers and community members Natalia Csoregi, Simon Giesecke, Jason Kratzer, Christian Holler, and Luke Wagner reported memory safety bugs present in Firefox 78 and Firefox ESR 78.0. #CVE-2020-15659: Memory safety bugs fixed in Firefox 79 and Firefox ESR 78.1 Reporter Mozilla developers and community Impact high Description This could lead to a perceived broken state, especially when interactions with existing browser dialogs and warnings do not work. When in an endless loop, a website specifying a custom cursor using CSS could make it look like the user is interacting with the user interface, when they are not. Among the many additions were: the Protections Dashboard, the addition of the Refresh button. #CVE-2020-15654: Custom cursor can overlay user interface Reporter SophosLabs Offensive Security team Impact low Description Firefox 78 and Firefox 78 ESR were released on June 30, 2020. Note: This issue only affected Windows operating systems. This required an attacker that is already capable of placing files in the installation directory. #CVE-2020-15657: DLL hijacking due to incorrect loading path Reporter Steve Nyan Lin Impact low Descriptionįirefox could be made to load attacker-supplied DLL files from the installation directory. Which led to an attacker being able to cut off the file ending at an earlier position, leading to a different file type being downloaded than shown in the dialog. The code for downloading files did not properly take care of special characters, #CVE-2020-15658: Overriding file type when saving to disk Reporter belden Impact low Description This risk was already mitigated by various precautions in the code, resulting in this bug rated at only moderate severity. JIT optimizations involving the Javascript arguments object could confuse later optimizations. #CVE-2020-15656: Type confusion for special arguments in IonMonkey Reporter Carl Smith, working with Google Project Zero Impact moderate Description #CVE-2020-6463: Use-after-free in ANGLE gl::Texture::onUnbindAsSamplerTexture Reporter Reported by Pawel Wylecial of REDTEAM.PL Impact moderate DescriptionĬrafted media files could lead to a race in texture caches, resulting in a use-after-free, memory corruption, and a potentially exploitable crash. This could have led to security issues for websites relying on sandbox configurations that allowed popups and hosted arbitrary content. Mozilla developer Anne van Kesteren discovered that with the allow-popups flag could be bypassed when using noopener links. #CVE-2020-15653: Bypassing iframe sandbox when allowing popups Reporter Anne van Kesteren Impact moderate Description Mozilla Developer Rob Wu discovered that a redirected HTTP request which is observed or modified through a web extension could bypass existing CORS checks, leading to potential disclosure of cross-origin information. #CVE-2020-15655: Extension APIs could be used to bypass Same-Origin Policy Reporter Rob Wu Impact high Description Unfortunately, this value is often transmitted to the peer, which allows bypassing ASLR. WebRTC used the memory address of a class instance as a connection identifier. #CVE-2020-6514: WebRTC data channel leaks internal address to peer Reporter Natalie Silvanovich of Google Project Zero Impact high Description This applied only to content that can be parsed as script. #CVE-2020-15652: Potential leak of redirect targets when loading scripts in a worker Reporter Mikhail Oblozhikhin Impact high Descriptionīy observing the stack trace for JavaScript errors in web workers, it was possible to leak the result of a cross-origin redirect. You can get more information by clicking the links to visit the relevant pages on the vendors website.Mozilla Foundation Security Advisory 2020-32 Security Vulnerabilities fixed in Firefox ESR 78.1 Announced JImpact high Products Firefox ESR Fixed in The links provided point to pages on the vendors websites. The information is provided "As Is" without warranty of any kind. Disclaimer: This webpage is intended to provide you information about patch announcement for certain specific software products.
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