Mozilla Firefox vulnerabilities

CVE-2020-26972 [CRITICAL] CWE-416 CVE-2020-26972: The lifecycle of IPC Actors allows managed actors to outlive their manager actors; and the former mu The lifecycle of IPC Actors allows managed actors to outlive their manager actors; and the former must ensure that they are not attempting to use a dead actor they have a reference to. Such a check was omitted in WebGL, resulting in a use-after-free and a potentially exploitable crash. This vulnerability affects Firefox < 84.

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-2020-35114 [HIGH] CWE-787 CVE-2020-35114: Mozilla developers reported memory safety bugs present in Firefox 83. Some of these bugs showed evid Mozilla developers reported memory safety bugs present in Firefox 83. 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.

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-2020-26971 [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-2020-26974 [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-2020-35111 [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-2020-26979 [MEDIUM] CWE-601 CVE-2020-26979: When a user typed a URL in the address bar or the search bar and quickly hit the enter key, a websit When a user typed a URL in the address bar or the search bar and quickly hit the enter key, a website could sometimes capture that event and then redirect the user before navigation occurred to the desired, entered address. To construct a convincing spoof the attacker would have had to guess what the user was typing, perhaps by suggesting it. This v

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-2020-26976 [MEDIUM] CVE-2020-26976: When a HTTPS pages was embedded in a HTTP page, and there was a service worker registered for the fo When a HTTPS pages was embedded in a HTTP page, and there was a service worker registered for the former, the service worker could have intercepted the request for the secure page despite the iframe not being a secure context due to the (insecure) framing. This vulnerability affects Firefox < 84.

CVE-2020-26977 [MEDIUM] CVE-2020-26977: By attempting to connect a website using an unresponsive port, an attacker could have controlled the By attempting to connect a website using an unresponsive port, an attacker could have controlled the content of a tab while the URL bar displayed the original domain. *Note: This issue only affects Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox < 84.

CVE-2020-26975 [MEDIUM] CVE-2020-26975: When a malicious application installed on the user's device broadcast an Intent to Firefox for Andro When a malicious application installed on the user's device broadcast an Intent to Firefox for Android, arbitrary headers could have been specified, leading to attacks such as abusing ambient authority or session fixation. This was resolved by only allowing certain safe-listed headers. *Note: This issue only affected Firefox for Android. Other operating sys

CVE-2020-16042 [MEDIUM] Mozilla Foundation Security Advisory 2020-55: CVE-2020-16042 Mozilla Foundation Security Advisory 2020-55 CVE: CVE-2020-16042 Product: Firefox ESR Impact: high Fixed in: Firefox ESR 78.6

CVE-2020-26952 [HIGH] CWE-787 CVE-2020-26952: Incorrect bookkeeping of functions inlined during JIT compilation could have led to memory corruptio Incorrect bookkeeping of functions inlined during JIT compilation could have led to memory corruption and a potentially exploitable crash when handling out-of-memory errors. This vulnerability affects Firefox < 83.

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-2020-26969 [HIGH] CWE-787 CVE-2020-26969: Mozilla developers reported memory safety bugs present in Firefox 82. Some of these bugs showed evid Mozilla developers reported memory safety bugs present in Firefox 82. 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.

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-2020-26950 [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-2020-26959 [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.