Mozilla Firefox Esr vulnerabilities

CVE-2021-23969 [MEDIUM] CVE-2021-23969: As specified in the W3C Content Security Policy draft, when creating a violation report, "User agent As specified in the W3C Content Security Policy draft, when creating a violation report, "User agents need to ensure that the source file is the URL requested by the page, pre-redirects. If that’s not possible, user agents need to strip the URL down to an origin to avoid unintentional leakage." Under certain types of redirects, Firefox incorrectly set the s

CVE-2020-35113 [HIGH] CWE-787 CVE-2020-35113: Mozilla developers reported memory safety bugs present in Firefox 83 and Firefox ESR 78.5. Some of t Mozilla developers reported memory safety bugs present in Firefox 83 and Firefox ESR 78.5. 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 < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.

CVE-2020-26974 [HIGH] CWE-787 CVE-2020-26974: When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object could have been incorrec When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object could have been incorrectly cast to the wrong type. This resulted in a heap user-after-free, memory corruption, and a potentially exploitable crash. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.

CVE-2020-26971 [HIGH] CWE-787 CVE-2020-26971: Certain blit values provided by the user were not properly constrained leading to a heap buffer over Certain blit values provided by the user were not properly constrained leading to a heap buffer overflow on some video drivers. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.

CVE-2020-26973 [HIGH] CVE-2020-26973: Certain input to the CSS Sanitizer confused it, resulting in incorrect components being removed. Thi Certain input to the CSS Sanitizer confused it, resulting in incorrect components being removed. This could have been used as a sanitizer bypass. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.

CVE-2020-35112 [HIGH] CVE-2020-35112: If a user downloaded a file lacking an extension on Windows, and then "Open"-ed it from the download If a user downloaded a file lacking an extension on Windows, and then "Open"-ed it from the downloads panel, if there was an executable file in the downloads directory with the same name but with an executable extension (such as .bat or .exe) that executable would have been launched instead. *Note: This issue only affected Windows operating systems. Other ope

CVE-2020-26978 [MEDIUM] CVE-2020-26978: Using techniques that built on the slipstream research, a malicious webpage could have exposed both Using techniques that built on the slipstream research, a malicious webpage could have exposed both an internal network's hosts as well as services running on the user's local machine. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.

CVE-2020-35111 [MEDIUM] CVE-2020-35111: When an extension with the proxy permission registered to receive <all_urls>, the proxy.onRequest ca When an extension with the proxy permission registered to receive , the proxy.onRequest callback was not triggered for view-source URLs. While web content cannot navigate to such URLs, a user opening View Source could have inadvertently leaked their IP address. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.

CVE-2020-26960 [HIGH] CWE-416 CVE-2020-26960: If the Compact() method was called on an nsTArray, the array could have been reallocated without upd If the Compact() method was called on an nsTArray, the array could have been reallocated without updating other pointers, leading to a potential use-after-free and exploitable crash. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.

CVE-2020-26968 [HIGH] CWE-787 CVE-2020-26968: Mozilla developers reported memory safety bugs present in Firefox 82 and Firefox ESR 78.4. Some of t Mozilla developers reported memory safety bugs present in Firefox 82 and Firefox ESR 78.4. 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. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.

CVE-2020-26959 [HIGH] CWE-416 CVE-2020-26959: During browser shutdown, reference decrementing could have occured on a previously freed object, res During browser shutdown, reference decrementing could have occured on a previously freed object, resulting in a use-after-free, memory corruption, and a potentially exploitable crash. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.

CVE-2020-26950 [HIGH] CWE-416 CVE-2020-26950: In certain circumstances, the MCallGetProperty opcode can be emitted with unmet assumptions resultin In certain circumstances, the MCallGetProperty opcode can be emitted with unmet assumptions resulting in an exploitable use-after-free condition. This vulnerability affects Firefox < 82.0.3, Firefox ESR < 78.4.1, and Thunderbird < 78.4.2.

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-2020-26961 [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-2020-26965 [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-2020-26956 [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-2020-26958 [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-2020-26953 [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-2020-26966 [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-2020-15683 [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 <