Vulnerabilities (CVE)

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Filtered by product Firefox Esr
CVE Vendors Products Updated CVSS v2 CVSS v3
CVE-2019-9792 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2021-07-21 7.5 HIGH 9.8 CRITICAL
The IonMonkey just-in-time (JIT) compiler can leak an internal JS_OPTIMIZED_OUT magic value to the running script during a bailout. This magic value can then be used by JavaScript to achieve memory corruption, which results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.
CVE-2019-11693 2 Linux, Mozilla 4 Linux Kernel, Firefox, Firefox Esr and 1 more 2021-07-21 7.5 HIGH 9.8 CRITICAL
The bufferdata function in WebGL is vulnerable to a buffer overflow with specific graphics drivers on Linux. This could result in malicious content freezing a tab or triggering a potentially exploitable crash. *Note: this issue only occurs on Linux. Other operating systems are unaffected.*. This vulnerability affects Thunderbird < 60.7, Firefox < 67, and Firefox ESR < 60.7.
CVE-2020-6828 2 Google, Mozilla 2 Android, Firefox Esr 2021-07-21 6.4 MEDIUM 7.5 HIGH
A malicious Android application could craft an Intent that would have been processed by Firefox for Android and potentially result in a file overwrite in the user's profile directory. One exploitation vector for this would be to supply a user.js file providing arbitrary malicious preference values. Control of arbitrary preferences can lead to sufficient compromise such that it is generally equivalent to arbitrary code execution.<br> *Note: This issue only affects Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox ESR < 68.7.
CVE-2020-6821 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2021-07-21 5.0 MEDIUM 7.5 HIGH
When reading from areas partially or fully outside the source resource with WebGL's <code>copyTexSubImage</code> method, the specification requires the returned values be zero. Previously, this memory was uninitialized, leading to potentially sensitive data disclosure. This vulnerability affects Thunderbird < 68.7.0, Firefox ESR < 68.7, and Firefox < 75.
CVE-2019-11740 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2021-07-21 7.5 HIGH 9.8 CRITICAL
Mozilla developers and community members reported memory safety bugs present in Firefox 68, Firefox ESR 68, and Firefox 60.8. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Firefox < 69, Thunderbird < 68.1, Thunderbird < 60.9, Firefox ESR < 60.9, and Firefox ESR < 68.1.
CVE-2019-17010 2 Mozilla, Opensuse 4 Firefox, Firefox Esr, Thunderbird and 1 more 2021-07-21 5.1 MEDIUM 7.5 HIGH
Under certain conditions, when checking the Resist Fingerprinting preference during device orientation checks, a race condition could have caused a use-after-free and a potentially exploitable crash. This vulnerability affects Thunderbird < 68.3, Firefox ESR < 68.3, and Firefox < 71.
CVE-2019-11709 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2021-07-21 7.5 HIGH 9.8 CRITICAL
Mozilla developers and community members reported memory safety bugs present in Firefox 67 and Firefox ESR 60.7. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Firefox ESR < 60.8, Firefox < 68, and Thunderbird < 60.8.
CVE-2019-9788 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2021-07-21 7.5 HIGH 9.8 CRITICAL
Mozilla developers and community members reported memory safety bugs present in Firefox 65, Firefox ESR 60.5, and Thunderbird 60.5. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.
CVE-2019-17011 2 Mozilla, Opensuse 4 Firefox, Firefox Esr, Thunderbird and 1 more 2021-07-21 5.1 MEDIUM 7.5 HIGH
Under certain conditions, when retrieving a document from a DocShell in the antitracking code, a race condition could cause a use-after-free condition and a potentially exploitable crash. This vulnerability affects Thunderbird < 68.3, Firefox ESR < 68.3, and Firefox < 71.
CVE-2020-12393 2 Microsoft, Mozilla 4 Windows, Firefox, Firefox Esr and 1 more 2021-07-21 4.6 MEDIUM 7.8 HIGH
The 'Copy as cURL' feature of Devtools' network tab did not properly escape the HTTP method of a request, which can be controlled by the website. If a user used the 'Copy as cURL' feature and pasted the command into a terminal, it could have resulted in command injection and arbitrary command execution. *Note: this issue only affects Firefox on Windows operating systems.*. This vulnerability affects Firefox ESR < 68.8, Firefox < 76, and Thunderbird < 68.8.0.
CVE-2021-23998 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2021-07-02 4.3 MEDIUM 6.5 MEDIUM
Through complicated navigations with new windows, an HTTP page could have inherited a secure lock icon from an HTTPS page. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.
CVE-2021-24002 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2021-07-02 6.8 MEDIUM 8.8 HIGH
When a user clicked on an FTP URL containing encoded newline characters (%0A and %0D), the newlines would have been interpreted as such and allowed arbitrary commands to be sent to the FTP server. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.
CVE-2021-23995 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2021-07-02 5.1 MEDIUM 8.8 HIGH
When Responsive Design Mode was enabled, it used references to objects that were previously freed. We presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.
CVE-2021-23994 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2021-07-02 6.8 MEDIUM 8.8 HIGH
A WebGL framebuffer was not initialized early enough, resulting in memory corruption and an out of bound write. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.
CVE-2021-29964 2 Microsoft, Mozilla 4 Windows, Firefox, Firefox Esr and 1 more 2021-06-30 5.8 MEDIUM 7.1 HIGH
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.
CVE-2021-29945 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2021-06-30 4.3 MEDIUM 6.5 MEDIUM
The WebAssembly JIT could miscalculate the size of a return type, which could lead to a null read and result in a crash. *Note: This issue only affected x86-32 platforms. Other platforms are unaffected.*. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.
CVE-2021-29955 1 Mozilla 2 Firefox, Firefox Esr 2021-06-30 2.6 LOW 5.3 MEDIUM
A transient execution vulnerability, named Floating Point Value Injection (FPVI) allowed an attacker to leak arbitrary memory addresses and may have also enabled JIT type confusion attacks. (A related vulnerability, Speculative Code Store Bypass (SCSB), did not affect Firefox.). This vulnerability affects Firefox ESR < 78.9 and Firefox < 87.
CVE-2021-29946 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2021-06-25 6.8 MEDIUM 8.8 HIGH
Ports that were written as an integer overflow above the bounds of a 16-bit integer could have bypassed port blocking restrictions when used in the Alt-Svc header. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.
CVE-2019-17026 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2021-05-13 6.8 MEDIUM 8.8 HIGH
Incorrect alias information in IonMonkey JIT compiler for setting array elements could lead to a type confusion. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Firefox ESR < 68.4.1, Thunderbird < 68.4.1, and Firefox < 72.0.1.
CVE-2014-1520 3 Fedoraproject, Microsoft, Mozilla 4 Fedora, Windows, Firefox and 1 more 2021-03-17 6.9 MEDIUM N/A
maintenservice_installer.exe in the Maintenance Service Installer in Mozilla Firefox before 29.0 and Firefox ESR 24.x before 24.5 on Windows allows local users to gain privileges by placing a Trojan horse DLL file into a temporary directory at an unspecified point in the update process.
CVE-2013-0800 5 Canonical, Debian, Mozilla and 2 more 11 Ubuntu Linux, Debian Linux, Firefox and 8 more 2021-03-11 6.8 MEDIUM N/A
Integer signedness error in the pixman_fill_sse2 function in pixman-sse2.c in Pixman, as distributed with Cairo and used in Mozilla Firefox before 20.0, Firefox ESR 17.x before 17.0.5, Thunderbird before 17.0.5, Thunderbird ESR 17.x before 17.0.5, SeaMonkey before 2.17, and other products, allows remote attackers to execute arbitrary code via crafted values that trigger attempted use of a (1) negative box boundary or (2) negative box size, leading to an out-of-bounds write operation.
CVE-2021-23953 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2021-03-03 4.3 MEDIUM 4.3 MEDIUM
If a user clicked into a specifically crafted PDF, the PDF reader could be confused into leaking cross-origin information, when said information is served as chunked data. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.
CVE-2021-23954 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2021-03-03 6.8 MEDIUM 8.8 HIGH
Using the new logical assignment operators in a JavaScript switch statement could have caused a type confusion, leading to a memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.
CVE-2021-23960 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2021-03-03 6.8 MEDIUM 8.8 HIGH
Performing garbage collection on re-declared JavaScript variables resulted in a user-after-poison, and a potentially exploitable crash. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.
CVE-2019-11745 6 Canonical, Debian, Mozilla and 3 more 23 Ubuntu Linux, Debian Linux, Firefox and 20 more 2021-02-19 6.8 MEDIUM 8.8 HIGH
When encrypting with a block cipher, if a call to NSC_EncryptUpdate was made with data smaller than the block size, a small out of bounds write could occur. This could have caused heap corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 68.3, Firefox ESR < 68.3, and Firefox < 71.
CVE-2020-35113 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2021-01-12 6.8 MEDIUM 8.8 HIGH
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-2020-35112 2 Microsoft, Mozilla 4 Windows, Firefox, Firefox Esr and 1 more 2021-01-12 6.8 MEDIUM 8.8 HIGH
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 operating systems are unaffected.*. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.
CVE-2020-35111 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2021-01-12 4.3 MEDIUM 4.3 MEDIUM
When an extension with the proxy permission registered to receive <all_urls>, 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-2020-26978 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2021-01-12 5.8 MEDIUM 6.1 MEDIUM
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-2020-26974 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2021-01-12 6.8 MEDIUM 8.8 HIGH
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-2020-26973 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2021-01-11 6.8 MEDIUM 8.8 HIGH
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-2020-26971 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2021-01-11 6.8 MEDIUM 8.8 HIGH
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-2020-26959 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2020-12-10 6.8 MEDIUM 8.8 HIGH
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-2020-26961 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2020-12-10 4.3 MEDIUM 6.5 MEDIUM
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 < 78.5, and Thunderbird < 78.5.
CVE-2020-26958 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2020-12-10 4.3 MEDIUM 6.1 MEDIUM
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-2020-26960 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2020-12-10 9.3 HIGH 8.8 HIGH
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-2020-26956 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2020-12-10 4.3 MEDIUM 6.1 MEDIUM
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-2020-26953 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2020-12-10 4.3 MEDIUM 4.3 MEDIUM
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-2020-26965 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2020-12-10 4.3 MEDIUM 6.5 MEDIUM
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 the possibility for the software keyboard to remember the typed password. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.
CVE-2020-26966 2 Microsoft, Mozilla 4 Windows, Firefox, Firefox Esr and 1 more 2020-12-10 4.3 MEDIUM 6.5 MEDIUM
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 Thunderbird < 78.5.
CVE-2020-26968 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2020-12-10 9.3 HIGH 8.8 HIGH
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-2020-26951 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2020-12-09 4.3 MEDIUM 6.1 MEDIUM
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 Thunderbird < 78.5.
CVE-2020-26950 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2020-12-09 9.3 HIGH 8.8 HIGH
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-2013-2566 4 Canonical, Fujitsu, Mozilla and 1 more 25 Ubuntu Linux, M10-1, M10-1 Firmware and 22 more 2020-11-23 4.3 MEDIUM 5.9 MEDIUM
The RC4 algorithm, as used in the TLS protocol and SSL protocol, has many single-byte biases, which makes it easier for remote attackers to conduct plaintext-recovery attacks via statistical analysis of ciphertext in a large number of sessions that use the same plaintext.
CVE-2020-15678 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2020-11-02 6.8 MEDIUM 8.8 HIGH
When recursing through graphical layers while scrolling, an iterator may have become invalid, resulting in a potential use-after-free. This occurs because the function APZCTreeManager::ComputeClippedCompositionBounds did not follow iterator invalidation rules. This vulnerability affects Firefox < 81, Thunderbird < 78.3, and Firefox ESR < 78.3.
CVE-2020-15676 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2020-11-02 4.3 MEDIUM 6.1 MEDIUM
Firefox sometimes ran the onload handler for SVG elements that the DOM sanitizer decided to remove, resulting in JavaScript being executed after pasting attacker-controlled data into a contenteditable element. This vulnerability affects Firefox < 81, Thunderbird < 78.3, and Firefox ESR < 78.3.
CVE-2020-15677 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2020-11-02 5.8 MEDIUM 6.1 MEDIUM
By exploiting an Open Redirect vulnerability on a website, an attacker could have spoofed the site displayed in the download file dialog to show the original site (the one suffering from the open redirect) rather than the site the file was actually downloaded from. This vulnerability affects Firefox < 81, Thunderbird < 78.3, and Firefox ESR < 78.3.
CVE-2020-15664 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2020-10-13 4.3 MEDIUM 6.5 MEDIUM
By holding a reference to the eval() function from an about:blank window, a malicious webpage could have gained access to the InstallTrigger object which would allow them to prompt the user to install an extension. Combined with user confusion, this could result in an unintended or malicious extension being installed. This vulnerability affects Firefox < 80, Thunderbird < 78.2, Thunderbird < 68.12, Firefox ESR < 68.12, Firefox ESR < 78.2, and Firefox for Android < 80.
CVE-2020-15669 1 Mozilla 2 Firefox Esr, Thunderbird 2020-10-02 6.8 MEDIUM 8.8 HIGH
When aborting an operation, such as a fetch, an abort signal may be deleted while alerting the objects to be notified. This results in a use-after-free and we presume that with enough effort it could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 68.12 and Thunderbird < 68.12.
CVE-2019-11729 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2020-09-30 5.0 MEDIUM 7.5 HIGH
Empty or malformed p256-ECDH public keys may trigger a segmentation fault due values being improperly sanitized before being copied into memory and used. This vulnerability affects Firefox ESR < 60.8, Firefox < 68, and Thunderbird < 60.8.