Mozilla Firefox vulnerabilities

CVE-2021-29989 [HIGH] CWE-787 CVE-2021-29989: Mozilla developers reported memory safety bugs present in Firefox 90 and Firefox ESR 78.12. Some of Mozilla developers reported memory safety bugs present in Firefox 90 and Firefox ESR 78.12. 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 Thunderbird < 78.13, Firefox ESR < 78.13, and Firefox < 91.

CVE-2021-29984 [HIGH] CWE-787 CVE-2021-29984: Instruction reordering resulted in a sequence of instructions that would cause an object to be incor Instruction reordering resulted in a sequence of instructions that would cause an object to be incorrectly considered during garbage collection. This led to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 78.13, Thunderbird < 91, Firefox ESR < 78.13, and Firefox < 91.

CVE-2021-29981 [HIGH] CVE-2021-29981: An issue present in lowering/register allocation could have led to obscure but deterministic registe An issue present in lowering/register allocation could have led to obscure but deterministic register confusion failures in JITted code that would lead to a potentially exploitable crash. This vulnerability affects Firefox < 91 and Thunderbird < 91.

CVE-2021-29985 [HIGH] CWE-416 CVE-2021-29985: A use-after-free vulnerability in media channels could have led to memory corruption and a potential A use-after-free vulnerability in media channels could have led to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 78.13, Thunderbird < 91, Firefox ESR < 78.13, and Firefox < 91.

CVE-2021-29990 [HIGH] CWE-787 CVE-2021-29990: Mozilla developers and community members reported memory safety bugs present in Firefox 90. Some of Mozilla developers and community members reported memory safety bugs present in Firefox 90. 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 < 91.

CVE-2021-29982 [MEDIUM] CWE-772 CVE-2021-29982: Due to incorrect JIT optimization, we incorrectly interpreted data from the wrong type of object, re Due to incorrect JIT optimization, we incorrectly interpreted data from the wrong type of object, resulting in the potential leak of a single bit of memory. This vulnerability affects Firefox < 91 and Thunderbird < 91.

CVE-2021-29983 [MEDIUM] CVE-2021-29983: Firefox for Android could get stuck in fullscreen mode and not exit it even after normal interaction Firefox for Android could get stuck in fullscreen mode and not exit it even after normal interactions that should cause it to exit. *Note: This issue only affected Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox < 91.

CVE-2021-29987 [MEDIUM] CWE-307 CVE-2021-29987: After requesting multiple permissions, and closing the first permission panel, subsequent permission After requesting multiple permissions, and closing the first permission panel, subsequent permission panels will be displayed in a different position but still record a click in the default location, making it possible to trick a user into accepting a permission they did not want to. *This bug only affects Firefox on Linux. Other operating systems a

CVE-2021-29971 [CRITICAL] CWE-281 CVE-2021-29971: If a user had granted a permission to a webpage and saved that grant, any webpage running on the sam If a user had granted a permission to a webpage and saved that grant, any webpage running on the same host - irrespective of scheme or port - would be granted that permission. *This bug only affects Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox < 90.

CVE-2021-29973 [HIGH] CVE-2021-29973: Password autofill was enabled without user interaction on insecure websites on Firefox for Android. Password autofill was enabled without user interaction on insecure websites on Firefox for Android. This was corrected to require user interaction with the page before a user's password would be entered by the browser's autofill functionality *This bug only affects Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefo

CVE-2021-29976 [HIGH] CWE-787 CVE-2021-29976: Mozilla developers reported memory safety bugs present in code shared between Firefox and Thunderbir Mozilla developers reported memory safety bugs present in code shared between Firefox and Thunderbird. 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 Thunderbird < 78.12, Firefox ESR < 78.12, and Firefox < 90.

CVE-2021-29972 [HIGH] CWE-416 CVE-2021-29972: A use-after-free vulnerability was found via testing, and traced to an out-of-date Cairo library. Up A use-after-free vulnerability was found via testing, and traced to an out-of-date Cairo library. Updating the library resolved the issue, and may have remediated other, unknown security vulnerabilities as well. This vulnerability affects Firefox < 90.

CVE-2021-29970 [HIGH] CWE-416 CVE-2021-29970: A malicious webpage could have triggered a use-after-free, memory corruption, and a potentially expl A malicious webpage could have triggered a use-after-free, memory corruption, and a potentially exploitable crash. *This bug could only be triggered when accessibility was enabled.*. This vulnerability affects Thunderbird < 78.12, Firefox ESR < 78.12, and Firefox < 90.

CVE-2021-29977 [HIGH] CWE-787 CVE-2021-29977: Mozilla developers reported memory safety bugs present in Firefox 89. Some of these bugs showed evid Mozilla developers reported memory safety bugs present in Firefox 89. 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 < 90.

CVE-2021-29974 [MEDIUM] CVE-2021-29974: When network partitioning was enabled, e.g. as a result of Enhanced Tracking Protection settings, a When network partitioning was enabled, e.g. as a result of Enhanced Tracking Protection settings, a TLS error page would allow the user to override an error on a domain which had specified HTTP Strict Transport Security (which implies that the error should not be override-able.) This issue did not affect the network connections, and they were correctly upgra

CVE-2021-29975 [MEDIUM] CVE-2021-29975: Through a series of DOM manipulations, a message, over which the attacker had control of the text bu Through a series of DOM manipulations, a message, over which the attacker had control of the text but not HTML or formatting, could be overlaid on top of another domain (with the new domain correctly shown in the address bar) resulting in possible user confusion. This vulnerability affects Firefox < 90.

CVE-2021-23999 [HIGH] CWE-269 CVE-2021-23999: If a Blob URL was loaded through some unusual user interaction, it could have been loaded by the Sys If a Blob URL was loaded through some unusual user interaction, it could have been loaded by the System Principal and granted additional privileges that should not be granted to web content. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.

CVE-2021-29966 [HIGH] CWE-787 CVE-2021-29966: Mozilla developers reported memory safety bugs present in Firefox 88. Some of these bugs showed evid Mozilla developers reported memory safety bugs present in Firefox 88. 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 < 89.

CVE-2021-29947 [HIGH] CWE-787 CVE-2021-29947: Mozilla developers and community members reported memory safety bugs present in Firefox 87. Some of Mozilla developers and community members reported memory safety bugs present in Firefox 87. 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 < 88.

CVE-2021-29964 [HIGH] CWE-125 CVE-2021-29964: A locally-installed hostile program could send `WM_COPYDATA` messages that Firefox would process inc A locally-installed hostile program could send `WM_COPYDATA` messages that Firefox would process incorrectly, leading to an out-of-bounds read. *This bug only affects Firefox on Windows. Other operating systems are unaffected.*. This vulnerability affects Thunderbird < 78.11, Firefox < 89, and Firefox ESR < 78.11.