Mozilla Firefox vulnerabilities

CVE-2020-26956 [MEDIUM] CWE-79 CVE-2020-26956: In some cases, removing HTML elements during sanitization would keep existing SVG event handlers and In some cases, removing HTML elements during sanitization would keep existing SVG event handlers and therefore lead to XSS. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.

CVE-2020-26951 [MEDIUM] CWE-79 CVE-2020-26951: A parsing and event loading mismatch in Firefox's SVG code could have allowed load events to fire, e 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. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbi

CVE-2020-26955 [MEDIUM] CWE-565 CVE-2020-26955: When a user downloaded a file in Firefox for Android, if a cookie is set, it would have been re-sent 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

CVE-2020-26964 [MEDIUM] CVE-2020-26964: If the Remote Debugging via USB feature was enabled in Firefox for Android on an Android version pri 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,

CVE-2020-26954 [MEDIUM] CVE-2020-26954: When accepting a malicious intent from other installed apps, Firefox for Android accepted manifests 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 Andro

CVE-2020-26961 [MEDIUM] CVE-2020-26961: When DNS over HTTPS is in use, it intentionally filters RFC1918 and related IP ranges from the respo 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. This vulnerability affects Firefox < 83, Firefox ESR <

CVE-2020-26962 [MEDIUM] CWE-1021 CVE-2020-26962: Cross-origin iframes that contained a login form could have been recognized by the login autofill se 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. This vulnerability affects Firefox < 83.

CVE-2020-26966 [MEDIUM] CVE-2020-26966: Searching for a single word from the address bar caused an mDNS request to be sent on the local netw 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.*. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thu

CVE-2020-26965 [MEDIUM] CWE-212 CVE-2020-26965: Some websites have a feature "Show Password" where clicking a button will change a password field in 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 t

CVE-2020-26957 [MEDIUM] CWE-665 CVE-2020-26957: OneCRL was non-functional in the new Firefox for Android due to a missing service initialization. Th 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.*. This vulnerability affects Firefox < 83.

CVE-2020-26953 [MEDIUM] CWE-1021 CVE-2020-26953: It was possible to cause the browser to enter fullscreen mode without displaying the security UI; th 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. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.

CVE-2020-26958 [MEDIUM] CWE-79 CVE-2020-26958: Firefox did not block execution of scripts with incorrect MIME types when the response was intercept 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. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.

CVE-2020-26967 [MEDIUM] CVE-2020-26967: When listening for page changes with a Mutation Observer, a malicious web page could confuse Firefox 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. This vulnerability affects Firefox < 83.

CVE-2020-26963 [MEDIUM] CVE-2020-26963: Repeated calls to the history and location interfaces could have been used to hang the browser. This 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. This vulnerability affects Firefox < 83.

CVE-2020-6829 [MEDIUM] CVE-2020-6829: When performing EC scalar point multiplication, the wNAF point multiplication algorithm was used; wh When performing EC scalar point multiplication, the wNAF point multiplication algorithm was used; which leaked partial information about the nonce used during signature generation. Given an electro-magnetic trace of a few signature generations, the private key could have been computed. This vulnerability affects Firefox < 80 and Firefox for Android < 80.

CVE-2020-15683 [CRITICAL] CWE-416 CVE-2020-15683: Mozilla developers and community members reported memory safety bugs present in Firefox 81 and Firef Mozilla developers and community members reported memory safety bugs present in Firefox 81 and Firefox ESR 78.3. 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. This vulnerability affects Firefox ESR < 78.4, Firefox < 82, and Thunderbird <

CVE-2020-15684 [CRITICAL] CWE-416 CVE-2020-15684: Mozilla developers reported memory safety bugs present in Firefox 81. Some of these bugs showed evid Mozilla developers reported memory safety bugs present in Firefox 81. 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. This vulnerability affects Firefox < 82.

CVE-2020-15254 [CRITICAL] CVE-2020-15254: Crossbeam is a set of tools for concurrent programming Crossbeam is a set of tools for concurrent programming. In crossbeam-channel before version 0.4.4, the bounded channel incorrectly assumes that `Vec::from_iter` has allocated capacity that same as the number of iterator elements. `Vec::from_iter` does not actually guarantee that and may allocate extra memory. The destructor of the `bounded` channel reconstructs `Vec` from the raw pointer based on the

CVE-2020-15681 [HIGH] CVE-2020-15681: When multiple WASM threads had a reference to a module, and were looking up exported functions, one When multiple WASM threads had a reference to a module, and were looking up exported functions, one WASM thread could have overwritten another's entry in a shared stub table, resulting in a potentially exploitable crash. This vulnerability affects Firefox < 82.

CVE-2020-15680 [MEDIUM] CVE-2020-15680: If a valid external protocol handler was referenced in an image tag, the resulting broken image size If a valid external protocol handler was referenced in an image tag, the resulting broken image size could be distinguished from a broken image size of a non-existent protocol handler. This allowed an attacker to successfully probe whether an external protocol handler was registered. This vulnerability affects Firefox < 82.